Vitamins and Minerals Chart: Complete Guide with Benefits and Safe Dosages

  What Vitamins Should I Take Daily? Quick Answer

You need all essential vitamins, but you may not need all of them as supplements.

• Start with food: A varied diet can provide many of the vitamins and minerals most adults need.
• Supplement specific gaps: Vitamin B12, vitamin D, iron, folate, calcium and other nutrients may require extra attention depending on diet, age or life stage.
• Compare the dose: The amount in a supplement can be much higher than your daily nutritional requirement.
• More is not always better: Some vitamins and minerals have upper intake limits and can cause problems when taken in excessive amounts.

→ Use the vitamin and mineral cards below to compare your daily need with common supplement doses, food sources and safety limits.

📌 In this guide:

• Essential vitamins for adults: What do you really need daily?
• Vitamin and supplement safety
• Vitamin and mineral daily needs guide
• Vitamin deficiency signs
• Vitamins and minerals for older adults
• Supplement picks
• How to choose and take supplements
• Smart supplementation
• Essential vitamins for adults: Quick list
• Best food sources of vitamins and minerals
• When is the best time to take vitamins?
• Vitamin and supplement FAQ

Check before supplementing if you:

• take prescription medications, especially anticoagulants, thyroid medication or certain antibiotics
• have kidney or liver disease
• are pregnant or breastfeeding
• have been advised to take a high-dose supplement for a diagnosed deficiency

Jump to a vitamin or mineral:

Vitamin A (Retinol and Carotenoids)

Main functions:
Vision, immune function, normal cell growth and maintenance of skin and body tissues.

Daily need:
Men: 900 mcg /day
Women: 700 mcg /day
Pregnancy: 770 mcg /day
Breastfeeding: 1,300 mcg /day

Common supplement dose:
Multivitamins often provide vitamin A close to the Daily Value, sometimes as a mixture of preformed vitamin A and beta-carotene.
Check the label carefully because IU and mcg are not interchangeable unless the form of vitamin A is known.

Best food sources:
Liver, eggs, dairy products, sweet potatoes, carrots, spinach and other dark-green or orange vegetables.

Possible deficiency signs:
Night blindness, dry eyes, impaired immune function and, in severe deficiency, eye damage.

Safety & upper limit
The adult upper limit for preformed vitamin A is 3,000 mcg /day.
High intakes of preformed vitamin A can cause toxicity and are particularly important to avoid during pregnancy unless specifically prescribed.

Biotin (Vitamin B7)

Main functions:
Helps enzymes metabolize fats, carbohydrates and amino acids and supports normal cellular metabolism.

Daily need:
Adults: 30 mcg/day
Pregnancy: 30 mcg/day
Breastfeeding: 35 mcg/day

Common supplement dose:
Multivitamins and B-complex products generally contain modest amounts, while supplements marketed for hair, skin and nails commonly contain much higher doses such as 2,500 to 5,000 mcg, and some products contain 10,000 mcg or more.

Best food sources:
Eggs, meat, fish, liver, nuts, seeds, sweet potatoes, spinach and broccoli.

Possible deficiency signs:
Hair thinning, skin rash and neurological symptoms can occur in true deficiency, although biotin deficiency is uncommon.

Safety & upper limit:
No formal upper intake limit has been established.
However, high-dose biotin can interfere with laboratory tests, including some thyroid, hormone and cardiac tests.
Tell your healthcare provider or laboratory if you take a high-dose biotin supplement.

Vitamin B12 (Cobalamin)

Main functions:
Red blood cell formation, DNA synthesis and normal nervous-system function.

Daily need:
Adults: 2.4 mcg/day
Pregnancy: 2.6 mcg/day
Breastfeeding: 2.8 mcg/day

Common supplement dose:
Multivitamins commonly provide approximately 5 to 25 mcg.
B-complex supplements often contain 50 to 500 mcg.
Stand-alone B12 supplements commonly contain 500 to 1,000 mcg.

Why are supplement doses so much higher than the RDA?
Vitamin B12 absorption falls sharply at high doses.
Only a small percentage of a 500 or 1,000 mcg dose is absorbed, which is one reason high-dose products are commonly sold.

Best food sources:
Meat, fish, shellfish, eggs, dairy products and fortified cereals or plant-based foods.

Possible deficiency signs:
Fatigue, anemia, weakness, memory problems, numbness or tingling in the hands and feet.

Safety & upper limit:
No tolerable upper intake level has been established for vitamin B12.
Higher-dose supplements can be useful in specific situations, particularly when dietary intake or absorption is inadequate.

Folate / Folic Acid (Vitamin B9)

Main functions:
DNA production, cell division and red blood cell formation.
Folate is particularly important before and during pregnancy.

Daily need:
Adults: 400 mcg /day
Pregnancy: 600 mcg /day
Breastfeeding: 500 mcg /day

Common supplement dose:
Adult supplements commonly contain approximately 400 to 800 mcg of folic acid, equivalent to about 680 to 1,360 mcg when taken with food.

For women who could become pregnant:
A daily intake of 400 mcg of folic acid from supplements, fortified foods or both is recommended in addition to folate naturally obtained from food.

Best food sources:
Spinach and other dark-green vegetables, asparagus, Brussels sprouts, beans, peas, oranges, liver and fortified grains.

Possible deficiency signs:
Megaloblastic anemia, fatigue, weakness and changes affecting rapidly dividing cells.

Safety & upper limit:
The adult upper limit is 1,000 mcg/day of folic acid from supplements and fortified foods.
This limit does not apply to naturally occurring food folate.
Very high folic acid intake can also complicate the detection of vitamin B12 deficiency.

Vitamin B1 (Thiamin)

Main functions:
Helps convert food into energy and supports normal nerve, muscle and cellular function.

Daily need:
Men: 1.2 mg/day
Women: 1.1 mg/day
Pregnancy: 1.4 mg/day
Breastfeeding: 1.4 mg/day

Common supplement dose:
Multivitamin/mineral supplements typically provide around 1.5 mg.
B-complex and stand-alone thiamin products may contain considerably higher amounts.

Best food sources:
Whole and enriched grains, pork, legumes, seeds, nuts and fortified cereals.

Possible deficiency signs:
Fatigue, weakness, loss of appetite, neurological symptoms and, in severe deficiency, beriberi or Wernicke-Korsakoff syndrome.

Safety & upper limit:
No formal upper intake limit has been established because oral thiamin has a low known toxicity.
This does not mean that very high doses are necessary for routine supplementation.

Vitamin B2 (Riboflavin)

Main functions:
Energy production, cellular growth and metabolism of fats, carbohydrates and proteins.

Daily need:
Men: 1.3 mg/day
Women: 1.1 mg/day
Pregnancy: 1.4 mg/day
Breastfeeding: 1.6 mg/day

Common supplement dose:
Multivitamin/mineral supplements commonly provide approximately 1.3 mg.
B-complex and stand-alone riboflavin supplements can contain substantially higher doses.

Best food sources:
Milk, yogurt, eggs, lean meats, liver, almonds, mushrooms and fortified cereals.

Possible deficiency signs:
Cracks at the corners of the mouth, sore throat, swollen tongue and skin changes.

Safety & upper limit:
No formal upper intake limit has been established.
Doses as high as 400 mg/day have been studied without reported toxicity, but this does not make 400 mg a normal daily nutritional requirement.

Vitamin B3 (Niacin)

Main functions:
Helps convert food into energy and supports normal cellular metabolism, nervous-system function and skin health.

Daily need:
Men: 16 mg /day
Women: 14 mg /day
Pregnancy: 18 mg /day
Breastfeeding: 17 mg /day

Common supplement dose:
Multivitamins generally provide niacin near the Daily Value.
Higher-dose nicotinic acid products also exist, but doses used to alter blood lipids are pharmacological rather than ordinary nutritional supplementation.

Best food sources:
Poultry, beef, fish, peanuts, legumes, whole grains and fortified foods.

Possible deficiency signs:
Severe deficiency can cause pellagra, characterized by skin changes, digestive symptoms and neurological problems.

Safety & upper limit:
The adult upper limit for supplemental niacin is 35 mg/day without medical supervision.
Higher doses, especially nicotinic acid, can cause flushing and other adverse effects.
Gram-level doses used for lipid disorders should only be taken under medical supervision.

Vitamin B5 (Pantothenic Acid)

Main functions:
Helps convert food into energy and is required for the synthesis and metabolism of fatty acids and other important compounds.

Daily need:
Adults: 5 mg/day
Pregnancy: 6 mg/day
Breastfeeding: 7 mg/day

Common supplement dose:
Multivitamin/mineral products commonly contain around 10 mg.
B-complex and stand-alone pantothenic acid supplements can contain much larger doses, sometimes ranging into the hundreds of milligrams.

Best food sources:
Chicken, beef, organ meats, eggs, mushrooms, potatoes, whole grains, yogurt, legumes and many vegetables.

Possible deficiency signs:
Deficiency is very rare because pantothenic acid is widely distributed in foods. Severe deficiency may cause fatigue, irritability, numbness and burning sensations in the feet.

Safety & upper limit:
No formal upper intake limit has been established.
Very large supplemental doses can cause digestive upset or diarrhea.

Vitamin B6 (Pyridoxine)

Main functions:
Protein and amino-acid metabolism, neurotransmitter production, hemoglobin formation and normal immune function.

Daily need:
Adults 19–50: 1.3 mg/day
Men 51+: 1.7 mg/day
Women 51+: 1.5 mg/day
Pregnancy: 1.9 mg/day
Breastfeeding: 2.0 mg/day

Common supplement dose:
Vitamin B6 is widely included in multivitamins and B-complex supplements.
Product doses vary considerably and can be many times higher than the nutritional requirement, so the amount on the label should be checked rather than assuming that a higher dose is better.

Best food sources:
Fish, poultry, beef liver, potatoes and other starchy vegetables, chickpeas, bananas and fortified cereals.

Possible deficiency signs:
Anemia, skin changes, swollen tongue, weakened immune function, irritability or neurological symptoms.

Safety & upper limit:
Long-term high-dose vitamin B6 can cause peripheral neuropathy and nerve damage.
The U.S. adult UL is 100 mg/day, while EFSA uses a more conservative adult UL of 12 mg/day.
For routine supplementation, avoid treating high-dose B6 products as equivalent to the normal daily requirement.

Vitamin C (Ascorbic Acid)

Main functions:
Antioxidant protection, collagen production, wound healing, immune function and improved absorption of non-heme iron from plant foods.

Daily need:
Men: 90 mg/day
Women: 75 mg/day
Pregnancy: 85 mg/day
Breastfeeding: 120 mg/day
Smokers: add 35 mg/day to the amounts above.

Common supplement dose:
Multivitamins usually provide vitamin C close to the Daily Value, while stand-alone supplements commonly provide approximately 250 to 1,000 mg per dose.

What about 1,000 mg vitamin C?
A 1,000 mg supplement is much higher than the daily nutritional requirement, but it remains below the adult upper intake limit.
Higher doses are not automatically more effective simply because they contain more vitamin C.

Best food sources:
Bell peppers, oranges and other citrus fruits, kiwi, strawberries, broccoli, Brussels sprouts and tomatoes.

Possible deficiency signs:
Fatigue, easy bruising, bleeding gums, slow wound healing and, in severe deficiency, scurvy.

Safety & upper limit:
The adult upper limit is 2,000 mg/day from food and supplements combined.
High supplemental doses can cause diarrhea, nausea and abdominal cramps.
People with hereditary hemochromatosis should also be cautious with very high vitamin C intake because it can increase iron absorption.

Vitamin D (Cholecalciferol / D3)

Main functions:
Helps the body absorb calcium, supports bone and muscle health and contributes to normal immune function.

Daily need:
Adults 19–70: 15 mcg (600 IU)/day
Adults over 70: 20 mcg (800 IU)/day
Pregnancy: 15 mcg (600 IU)/day
Breastfeeding: 15 mcg (600 IU)/day

Common supplement dose:
Vitamin D supplements are commonly sold in doses of 1,000 to 2,000 IU (25 to 50 mcg) per day.
Products containing 4,000 IU (100 mcg) are also available, but 4,000 IU corresponds to the adult upper intake limit rather than the routine daily requirement.

Do you need 2,000 IU every day?
Not necessarily.
Supplement needs depend on dietary intake, sun exposure, age and vitamin D status.
A person with a confirmed deficiency may temporarily need a different dose under professional guidance.

Best food sources:
Fatty fish such as salmon, trout and sardines, egg yolks, fortified milk, fortified plant drinks and other fortified foods.

Possible deficiency signs:
Low vitamin D can contribute to bone pain, muscle weakness and poor bone mineralization.
Severe deficiency can cause osteomalacia in adults.

Safety & upper limit:
The adult upper intake limit is 100 mcg (4,000 IU)/day unless a higher dose is used under medical supervision.
Excessive vitamin D can cause hypercalcemia and other complications.

Vitamin E (Alpha-Tocopherol)

Main functions:
Acts as an antioxidant that helps protect cells from oxidative damage and supports normal immune and cellular function.

Daily need:
Adults: 15 mg/day
Pregnancy: 15 mg/day
Breastfeeding: 19 mg/day

Common supplement dose:
Once-daily multivitamins commonly provide around 13.5 mg of vitamin E.
Stand-alone vitamin E supplements frequently contain 67 mg (about 100 IU of natural vitamin E) or more.

Important when reading the label:
Some older products still use International Units (IU).
Natural and synthetic vitamin E have different conversions, so comparing products by IU alone can be misleading.

Best food sources:
Sunflower seeds, almonds, hazelnuts, wheat-germ oil, sunflower and safflower oils, spinach and broccoli.

Possible deficiency signs:
True vitamin E deficiency is rare in healthy people.
Severe deficiency can cause neurological problems, muscle weakness and impaired coordination, particularly in people with disorders that affect fat absorption.

Safety & upper limit:
The U.S. adult upper limit for supplemental vitamin E is 1,000 mg/day.
This is a safety ceiling, not a recommended dose.
High-dose vitamin E supplements can increase bleeding risk and may interact with anticoagulant or antiplatelet medications.
Long-term high-dose supplementation has not been shown to prevent cardiovascular disease or cancer in healthy adults.

Vitamin K (K1 and K2)

Main functions:
Essential for normal blood clotting and involved in proteins that contribute to bone metabolism.

Daily need:
Men: 120 mcg/day
Women: 90 mcg/day
Pregnancy: 90 mcg/day
Breastfeeding: 90 mcg/day

Common supplement dose:
Vitamin K is included in many multivitamins, often at amounts below the full Daily Value.
Stand-alone vitamin K products vary much more widely.
Vitamin K2 supplements, especially MK-7, are commonly sold in doses around 90 to 200 mcg per serving.

K1 or K2?
Vitamin K1 (phylloquinone) is found mainly in green vegetables.
Vitamin K2 refers to several menaquinones, including MK-4 and MK-7, which are found in some fermented and animal foods and are also used in supplements.

Best food sources:
Kale, spinach, collard greens, broccoli, Brussels sprouts and vegetable oils provide mainly vitamin K1. Natto and some fermented foods provide vitamin K2.

Possible deficiency signs:
Vitamin K deficiency is uncommon in healthy adults but can increase bleeding tendency and impair normal blood clotting.

Safety & upper limit:
No formal upper intake limit has been established because vitamin K has a low known toxicity.
However, vitamin K can interact significantly with warfarin and similar anticoagulants.
People taking these medications should keep vitamin K intake consistent rather than suddenly increasing or decreasing food or supplement doses.

Calcium

Main functions:
Bone and tooth structure, muscle contraction, nerve transmission and normal blood clotting.

Daily need:
Adults 19–50: 1,000 mg/day
Men 51–70: 1,000 mg/day
Women 51–70: 1,200 mg/day
Adults 71+: 1,200 mg/day
Pregnancy and breastfeeding, adults 19+: 1,000 mg/day

Common supplement dose:
Multivitamin/mineral products commonly contain about 200 to 300 mg of calcium.
Calcium-only or calcium + vitamin D supplements commonly provide 500 to 600 mg per serving.

How much should you take at once?
Calcium absorption is generally better when supplemental doses are 500 mg or less at one time.
If you need more, dividing the dose can improve absorption.

Calcium carbonate or calcium citrate?
Calcium carbonate contains more elemental calcium and is generally best taken with food.
Calcium citrate is less dependent on stomach acid and can be taken with or without food.

Best food sources:
Milk, yogurt, cheese, calcium-fortified plant drinks, canned sardines or salmon with bones, calcium-set tofu, kale and other leafy greens.

Possible deficiency effects:
Long-term inadequate calcium intake can reduce bone strength and contribute to osteoporosis and fracture risk.

Safety & upper limit:
The upper limit is 2,500 mg/day for adults 19-50 and 2,000 mg/day from age 51 onward, including food and supplements.
Calcium supplements can interact with medications such as levothyroxine and some antibiotics, so timing may matter.

Copper

Main functions:
Helps produce energy, form connective tissue and blood vessels, support the nervous and immune systems and assist iron metabolism.

Daily need:
Adults: 900 mcg/day
Pregnancy: 1,000 mcg/day
Breastfeeding: 1,300 mcg/day

Common supplement dose:
Copper is included in many multivitamin/mineral products and stand-alone supplements.
Product doses vary widely, from small amounts up to several milligrams.

Do you need a copper supplement?
Most adults obtain enough copper from food.
Supplementation may be more relevant when a deficiency is confirmed or when long-term high-dose zinc intake has reduced copper absorption.

Best food sources:
Liver, oysters and other shellfish, cashews, sunflower seeds, dark chocolate, mushrooms, chickpeas and whole grains.

Possible deficiency signs:
Anemia, low white blood cell counts, impaired immune function, neurological symptoms and abnormalities in connective tissue or bone can occur in deficiency.

Safety & upper limit:
The adult upper limit is 10,000 mcg (10 mg)/day.
Excess copper can damage the liver.
High-dose zinc supplements can also reduce copper absorption and contribute to deficiency.

Iron

Main functions:
Essential for hemoglobin and myoglobin production, oxygen transport, energy metabolism, normal growth and cellular function.

Daily need:
Men 19+: 8 mg/day
Women 19–50: 18 mg/day
Women 51+: 8 mg/day
Pregnancy: 27 mg/day
Breastfeeding: 9 mg/day

Common supplement dose:
Multivitamin/mineral supplements containing iron, especially products designed for women, commonly provide about 18 mg.
Iron-only supplements often contain considerably more, with many products providing around 65 mg of elemental iron.

Important: elemental iron matters
Different iron compounds contain different percentages of elemental iron.
The number that matters on the Supplement Facts label is the amount of elemental iron, not the total weight of ferrous sulfate, fumarate or gluconate.

Best food sources:
Red meat, poultry, seafood, liver, lentils, beans, tofu, spinach and iron-fortified cereals.

Improve absorption:
Vitamin C can increase absorption of non-heme iron from plant foods.
Calcium may interfere with iron absorption, so individual calcium and iron supplements are often taken at different times.

Possible deficiency signs:
Fatigue, weakness, poor concentration, reduced exercise tolerance, pale skin and iron-deficiency anemia.

Safety & upper limit:
The adult upper limit is 45 mg/day from food and supplements for healthy adults.
Higher doses are sometimes prescribed to treat iron-deficiency anemia, but they should not be considered routine supplementation.
High-dose iron commonly causes nausea, constipation and other digestive symptoms, and people with hereditary hemochromatosis should avoid unnecessary iron supplementation.

Magnesium

Main functions:
Supports muscle and nerve function, energy production, protein synthesis, blood glucose regulation, blood pressure regulation and normal bone structure.

Daily need:
Men 19–30: 400 mg/day
Men 31+: 420 mg/day
Women 19–30: 310 mg/day
Women 31+: 320 mg/day
Pregnancy: 350–360 mg/day depending on age
Breastfeeding: 310–320 mg/day depending on age

Common supplement dose:
Magnesium supplements vary widely, but many stand-alone products provide approximately 100 to 350 mg of elemental magnesium per serving.
Always read the amount of elemental magnesium on the label rather than the total weight of the magnesium compound.

Which form of magnesium?
Magnesium citrate, chloride, lactate and aspartate tend to be absorbed more completely than less soluble forms such as magnesium oxide.
The best form also depends on tolerance and why the supplement is being used.

Best food sources:
Pumpkin seeds, almonds, spinach and other leafy greens, black beans, whole grains, avocado and dark chocolate.

Possible deficiency signs:
Loss of appetite, nausea, fatigue and weakness can occur early.
More severe deficiency can cause numbness, muscle contractions or cramps, seizures and abnormal heart rhythms.

Safety & upper limit:
The adult upper limit is 350 mg/day from supplements and medications only.
It does not include magnesium naturally present in food.
Supplemental magnesium above this level can cause diarrhea, nausea and abdominal cramping.
The risk of magnesium toxicity is greater with impaired kidney function.
Magnesium can also interact with some antibiotics and bisphosphonates.

Manganese

Main functions:
Supports energy metabolism, antioxidant enzymes, bone formation, reproduction, immune function and normal blood clotting.

Daily need:
Men: 2.3 mg/day
Women: 1.8 mg/day
Pregnancy: 2.0 mg/day
Breastfeeding: 2.6 mg/day

Common supplement dose:
Multivitamin/mineral products that contain manganese commonly provide about 1 to 4.5 mg.
Stand-alone manganese supplements often contain 5 to 20 mg, which can approach or exceed the adult upper intake limit.

Best food sources:
Whole grains, oats, brown rice, nuts, legumes, spinach, kale, tea, pineapple and shellfish.

Possible deficiency signs:
True manganese deficiency is rare.
Very low intake may affect bone formation, growth and metabolism.

Safety & upper limit:
The adult upper limit is 11 mg/day from food and supplements combined.
Excessive exposure can cause neurological toxicity, and people with chronic liver disease may be more vulnerable to manganese accumulation.

Phosphorus

Main functions:
Major structural component of bones and teeth and essential for energy production, DNA, cell membranes and many biochemical reactions.

Daily need:
Adults 19+: 700 mg/day
Pregnancy: 700 mg/day
Breastfeeding: 700 mg/day

Common supplement dose:
Most multivitamin/mineral products provide little phosphorus.
Supplements that contain phosphorus typically provide 10% or less of the Daily Value, although some specialized products contain much more.

Do you usually need a phosphorus supplement?
Usually not.
Phosphorus is widely available in food and is also present in many processed foods as phosphate additives.

Best food sources:
Milk, yogurt, cheese, meat, poultry, fish, eggs, beans, lentils, nuts and whole grains.

Possible deficiency signs:
Deficiency is uncommon but can cause weakness, bone pain, poor appetite and impaired bone mineralization.

Safety & upper limit:
The U.S. upper limit is 4,000 mg/day for adults 19-70 and 3,000 mg/day for adults 71+.
People with kidney disease may need to restrict phosphorus intake because phosphate can accumulate when kidney function is impaired.

Potassium

Main functions:
Supports normal muscle contraction, nerve transmission, kidney and heart function and fluid balance.

Daily need:
Men 19+: 3,400 mg/day
Women 19+: 2,600 mg/day
Pregnancy: 2,900 mg/day
Breastfeeding: 2,800 mg/day

Common supplement dose:
Multivitamin/mineral products that contain potassium commonly provide only around 80 mg.
Many stand-alone potassium supplements provide about 99 mg per serving.

Why are supplement doses so small?
Most potassium should normally come from food.
The amounts in ordinary supplements are far below the daily nutritional requirement, while high-dose potassium products require much greater caution.

Best food sources:
Potatoes, beans, lentils, tomatoes, spinach, avocados, bananas, dried fruit, yogurt, milk, fish and meat.

Possible deficiency signs:
Low potassium can cause muscle weakness, fatigue, constipation and abnormal heart rhythms in more severe cases.

Safety & upper limit:
No formal UL has been established for healthy adults because healthy kidneys normally excrete excess dietary potassium.
However, potassium supplements and potassium-based salt substitutes can be dangerous in people with kidney disease or those taking medications that reduce potassium excretion, including some ACE inhibitors and potassium-sparing diuretics.

Selenium

Main functions:
Required for thyroid hormone metabolism, DNA production, reproduction and antioxidant enzymes that help protect cells from oxidative damage.

Daily need:
Adults: 55 mcg/day
Pregnancy: 60 mcg/day
Breastfeeding: 70 mcg/day

Common supplement dose:
Many multivitamin/mineral products contain about 55 mcg.
Combination supplements commonly contain 50 to 200 mcg.
Stand-alone selenium products often provide 100 to 400 mcg.

Best food sources:
Seafood, meat, poultry, eggs, dairy products, grains and Brazil nuts. Brazil nuts can contain very high and variable amounts of selenium.

Possible deficiency effects:
Selenium deficiency is uncommon in many countries but can impair selenoprotein function and may affect thyroid and immune function.

Safety & upper limit:
The U.S. adult upper limit is 400 mcg/day from all sources.
EFSA uses a more conservative adult upper limit of 255 mcg/day.
Chronic excess can cause hair loss, brittle nails, metallic taste, garlic-like breath, nausea and neurological symptoms.

Sodium

Main functions:
Maintains fluid balance and is essential for nerve impulses and muscle contraction.

Daily need:
Adults: 1,500 mg/day
Pregnancy: 1,500 mg/day
Breastfeeding: 1,500 mg/day

Do you need a sodium supplement?
Most people obtain more than enough sodium from food, particularly processed and restaurant foods.
Routine sodium supplementation is generally unnecessary for healthy adults.

When are electrolyte products different?
Sports drinks and electrolyte products can contain sodium to replace losses from prolonged sweating, heat exposure or endurance exercise.
Their sodium content should be considered separately from ordinary daily supplementation.

Main food sources:
Table salt, bread, processed meats, cheese, sauces, soups, packaged foods and restaurant meals contribute much of the sodium in typical diets.

Low sodium can also be a problem:
Hyponatremia is usually related to fluid balance, illness, medications or unusually large fluid intake rather than simply failing to eat enough salt.

Chronic disease risk guidance:
For adults, the National Academies recommends reducing sodium intake when it exceeds 2,300 mg/day.
The 2,300-mg level is a Chronic Disease Risk Reduction intake rather than a conventional toxicity UL.

Zinc

Main functions:
Supports immune function, DNA and protein synthesis, wound healing, cell division, growth and normal taste.

Daily need:
Men: 11 mg/day
Women: 8 mg/day
Pregnancy: 11 mg/day
Breastfeeding: 12 mg/day

Common supplement dose:
Multivitamin/mineral products commonly provide zinc near the Daily Value of 11 mg.
Stand-alone supplements often provide approximately 10 to 30 mg of elemental zinc, depending on the product and intended use.

Elemental zinc matters:
Zinc gluconate, zinc citrate, zinc acetate and zinc sulfate contain different amounts of the mineral compound, but the Supplement Facts label reports the amount of elemental zinc.

Best food sources:
Oysters, beef, poultry, crab, fortified cereals, beans, nuts, seeds and dairy products.

Possible deficiency signs:
Reduced appetite, impaired immune function, slow wound healing, hair loss and changes in taste or smell can occur with zinc deficiency.

Safety & upper limit:
The adult upper limit is 40 mg/day from all sources.
Taking 50 mg or more for several weeks can reduce copper absorption and may impair immune function.
Zinc can also interact with quinolone and tetracycline antibiotics, so dose timing matters.

  Vitamin Deficiency Signs: What to Watch For

Vitamin and mineral deficiencies do not always cause obvious symptoms at first.
When symptoms appear, they can overlap with many other conditions, so they are best used as clues rather than a diagnosis.

→ Don't guess from symptoms alone: If a deficiency is suspected, testing can help determine whether supplementation is actually needed.

Calcium: Bone needs increase for some older adults

Calcium needs rise to 1,200 mg/day for women ages 51–70 and for all adults age 71 and older.

Men ages 51–70 still need 1,000 mg/day.
Food sources include dairy products, fortified plant drinks, calcium-set tofu and canned fish with edible bones.

Vitamin D: The daily need rises after age 70

Adults ages 19–70 need 600 IU (15 mcg) per day.

From age 71 onward, the daily recommendation rises to 800 IU (20 mcg).

Vitamin D helps the body absorb calcium and supports normal bone and muscle function.

Vitamin B12: Absorption can become less efficient

The daily requirement remains 2.4 mcg, but getting enough B12 can become more difficult with age.

Some older adults produce less stomach acid, which can reduce absorption of the vitamin B12 naturally bound to food.

For this reason, adults over 50 are often advised to obtain at least some of their vitamin B12 from fortified foods or supplements, where the vitamin is not bound to food protein.

Iron: Needs usually decrease after menopause

Adult men need 8 mg/day.

Women ages 19-50 need 18 mg/day, but after age 50 the recommendation falls to 8 mg/day.

Iron supplements should not be taken automatically simply because someone is older.
Excess iron can also be harmful, so supplementation is best targeted to an actual need.

Magnesium, Potassium and Zinc: Needs do not suddenly disappear with age

Magnesium: about 420 mg/day for men and 320 mg/day for women age 31 and older.

Potassium: 3,400 mg/day for men and 2,600 mg/day for women.

Zinc: 11 mg/day for men and 8 mg/day for women.

Most of these amounts should ideally come from food unless a supplement is needed for a specific reason.

Important for older adults:

Medications, reduced appetite, digestive disorders and kidney function can all affect nutrient needs or supplement safety.
If several supplements or prescription medications are being used, checking for interactions is especially important.

Vitamin D3 - 2,000 IU

Useful for: Increasing vitamin D intake when food and sun exposure do not provide enough.

Product dose: 2,000 IU (50 mcg) vitamin D3 per tablet.

Remember that the normal daily need for most adults through age 70 is 600 IU, so a 2,000-IU supplement is more than the daily nutritional requirement but still below the adult upper limit of 4,000 IU/day.

Nature Made Vitamin D3 2000 IU

Magnesium Glycinate - 200 mg

Useful for: Adding magnesium when dietary intake is insufficient or when this form is preferred for its generally good tolerability.

Product dose: 200 mg elemental magnesium per serving of two capsules.

When comparing magnesium products, always look at the amount of elemental magnesium rather than the total weight of the magnesium compound.

Nature Made Magnesium Glycinate

Vitamin B12 - 1,000 mcg

Useful for: People who need substantially more B12 than they obtain from food, including some older adults and people following vegan diets.

Product dose: 1,000 mcg vitamin B12 per fast-dissolve tablet.

This is much higher than the adult daily need of 2.4 mcg, but high-dose B12 supplements are common because only a small fraction is absorbed at high doses.

Nature Made B12 Fast Dissolve 1000 mcg

Vitamin C + Vitamin D3 + Zinc

Useful for: Combining several nutrients involved in normal immune function in one supplement.

The current formula contains vitamin C, vitamin D3, zinc, vitamin A and vitamin E.

This type of supplement can help increase nutrient intake, but it should not be presented as a way to prevent colds or guarantee faster recovery.

Nature Made Super C with Vitamin D3 & Zinc

Daily Multivitamin

Useful for: Adults looking for broad nutritional coverage when their diet may leave several nutrient gaps.

Nature Made Advanced Multivitamin for Adults Gummies currently provides 20 key nutrients, including calcium, magnesium and all eight B vitamins.

A multivitamin can help fill nutritional gaps, but it does not replace a varied diet and is not automatically necessary for every healthy adult.

Nature Made Advanced Multivitamin for Adults

Simple rule:

Choose the nutrient first, then the dose, then the product, not the other way around.

   Simple absorption tip:

Vitamin C helps the body absorb non-heme iron from plant foods.
Try pairing lentils, beans or leafy greens with peppers, tomatoes, citrus fruit or another vitamin C-rich food.

Simple rule:

Follow the product instructions, choose a time you can stick to, and separate supplements only when there is a known absorption or medication interaction.