Eating a balanced diet supports everything from your bone health to immune system. Getting enough nutrients becomes especially important for older adults at a higher risk for low vitamin consumption, according to a paper published in Clinical Interventions in Aging.

Though your diet is where most of the essential nutrients you need come from, your doctor may recommend supplements or multivitamins to help fill in the gaps. For instance, people who take certain medications that deplete the body of a particular nutrient or those with dietary restrictions will need extra help to ensure they’re getting the essential nutrients.

We spoke to experts to figure out which vitamins and minerals you need for healthy aging.

1. Magnesium

Magnesium is a mineral that provides several key functions in the body. It keeps your muscles strong, regulates blood sugar levels and contributes to heart health. Dr. Jacob Teitelbaum, a board-certified internist in integrative medicine, told us that “magnesium is critical for well over 300 reactions in the body.” He said an unprocessed diet has about 600 mg of magnesium daily, but the average American diet has less than 250 mg of magnesium after processing. For reference, the daily recommended amount of magnesium is 400 to 420 mg per day for adult men and 310 to 320 mg for women, but more is needed for those who are pregnant or breastfeeding.

Dr. Teitelbaum warned that the effects of low magnesium may include an increased risk of metabolic syndrome. This can lead to heart attacks, strokes and dementia. You may also feel exhausted or experience widespread muscle pain if you’re not getting enough magnesium.

You can find magnesium in a wide range of ingredients. Dr. Peter Brukner, a specialist sports and exercise physician, said you can find magnesium in nuts, seeds, whole grains and leafy green vegetables like spinach. In extra yummy news, you can also get magnesium from dark chocolate.

“Some older adults or those who take specific medicines (such as diuretics or drugs for acid reflux) may not receive enough magnesium from their diet and might need a supplement,” he said. “However, too much magnesium can cause stomach issues, so be careful.”

2. B vitamins

You also need a range of B Vitamins, including B12 and folate (also called folic acid), to maintain your health as you age. Vitamin B-12 works with folate to help your body make new cells, including blood cells and nerve cells. While you don’t usually require more B12 as you age, your body cannot absorb it as well when you get older. Dr. Brukner said this is because “stomachs make less acid, and this acid is necessary to take the vitamin from food into the body.”

Dr. Teitelbaum said B vitamins are critical for energy production, and suboptimal levels can affect your health. He warns that B vitamin deficiency has been associated with “a marked increase of dementia (especially folic acid) and increased risk of heart attack and stroke (especially in those with elevated homocysteine levels).” Symptoms of B12 deficiency include weakness or poor balance, loss of appetite and numbness and tingling in the hands and feet.

B12 is found in animal proteins like meat, fish and eggs. Dr. Brukner said that if you don’t eat these foods, you may want to turn to foods like cereals and nutritional yeast with added B12. “Older people, especially those having certain stomach issues or taking medicine that lowers stomach acid, might need to take a B12 vitamin supplement,” he explained.

Amelia Ti, a registered dietitian and diabetes educator in New York City, who is also part of CNET’s medical review board, adds that people taking medicine that blocks B12 absorption, like omeprazole or metformin, may also need a vitamin B12 supplement.

3. Calcium

The National Institute on Aging says that calcium is especially important for older people at risk for bone loss. The Institute recommends 1,000 mg each day for men between the ages of 51 and 70, and 1,200 mg per day for men 71 and older. Women aged 51 and up are recommended to take 1,200 mg each day.

“Calcium is well-known for making bones strong, but it is also crucial for muscles to work right,” Dr. Brukner said. “As people become older, their bodies take in less calcium from food, which can cause bones to become weaker.” You can get calcium naturally from sources like milk, yogurt and cheese. The Harvard T.H. Chan School of Public Health notes that calcium is also available in kale, salmon, tofu, almonds and spinach.

As for supplements, Dr. Brukner said, “If you are at risk for bone troubles or don’t get enough calcium in your food, taking supplements might be useful. But too much calcium can cause other issues like kidney stones, so talk with your doctor first.”

4. Vitamin D

Vitamin D is often called the sunshine vitamin because you typically absorb it through the skin just by being outside. However, during winter months, if you live in a cloudy climate or avoid natural sunlight as you age, you may not get enough. Your body needs vitamin D to properly absorb calcium, making it an important nutrient for bone health.

Dr. Brukner says that in addition to sunshine, you can get vitamin D from fatty fish like salmon and mackerel, fortified milk and cereals. Your doctor may also recommend a supplement if you’re experiencing bone loss or at risk of osteoporosis.

In addition to bone health, Dr. Teitelbaum said vitamin D can help you fight off disease. He said, “Suboptimal vitamin D is associated with increased autoimmunity, higher risk of severe infectious diseases (Dr. Fauci noted that he took vitamin D during the COVID [pandemic]) and increased cancer risk.”

5. Omega-3 fatty acids

Omega-3 fatty acids are essential to many of your body’s functions. They play a role in both heart and brain health. However, as Cleveland Clinic points out, your body isn’t able to produce enough omega-3s on its own. This means you need to get more from the foods you eat or supplements you take.

“Omega-3 fatty acids are very good for heart health and can help lessen swelling, which is important for older people,” Dr. Brukner explained. “They are also beneficial for brain well-being and might help guard against memory loss and diseases such as Alzheimer’s.” Ti adds that omega-3s help lessen swelling by reducing inflammation.

Fatty fish like salmon are a good source of omega-3 fatty acids. Dr. Brukner said you can also turn to flaxseeds, chia seeds and walnuts but added a warning: “These give a different type of omega-3 that the body does not use so easily.” Fish oil and algae oil can serve as supplements, too.

6. Zinc

A 2015 paper, published in Pathobiology of Aging and Age-related Diseases, calls zinc an “essential micronutrient for human health in general, and particularly for the elderly.” The authors say zinc plays “an important role in the aging process” and that zinc deficiency may be connected to several age-related chronic illnesses, which include hardening of the arteries, degenerative diseases of the nervous system, age-related changes to the immune system and cancer.

“When we get older, our immune system becomes weaker, and if we don’t have enough zinc, this can make it even worse,” Dr. Brukner explained.

You can find zinc in shellfish, red meat, poultry, beans, nuts and seeds. Dr. Brukner said oysters are particularly zinc-rich. He added, “Some older people might find zinc supplements helpful, especially if they often get sick or do not eat enough foods high in zinc. But taking too much zinc can cause problems with other minerals in the body, so it’s important to follow advised amounts.”

The bottom line 

Eating well can help boost your bones, immune system and more as you age. Along with exercise and other good habits, getting the right minerals and vitamins may improve your health. Try to get ample magnesium, B vitamins, calcium, vitamin D, omega-3s and zinc in your diet each day. Make sure you talk to your doctor before you take any supplements to find out how they may interact with your existing medications and health conditions.