What Your Body Needs Changes After 60

As you get older, your body absorbs fewer nutrients from food alone. Your stomach produces less acid, which means you extract less vitamin B12 from meat and dairy. Your skin makes less vitamin D when exposed to sunlight. Your kidneys become less efficient at activating vitamin D. At the same time, many common medications — blood pressure pills, acid reflux treatments, diabetes drugs — interfere with how your body absorbs or uses specific vitamins and minerals.

This does not mean you automatically need supplements. It means you need to know which nutrients matter most for you, whether you are getting enough from food, and whether a supplement makes sense for your situation. A doctor or registered dietitian can answer those questions by looking at what you eat, what medications you take, and what your blood work shows.

Key Takeaways

  • Vitamin B12, vitamin D, calcium, and iron are the nutrients seniors most often lack, and blood tests can show whether you need more.
  • Food is the first choice — a piece of salmon gives you vitamin D, selenium, and protein at once — but supplements fill gaps when food sources are not enough.
  • Some supplements interact with medications or blood thinners, so your doctor needs to know everything you take, including over-the-counter vitamins.
  • More is not better: taking too much of some vitamins can cause harm, and your body cannot store or use excess amounts of water-soluble vitamins.
  • A registered dietitian can review your diet and medications to tell you which supplements, if any, make sense for you.

The Nutrients Seniors Most Often Run Short On

Vitamin B12 helps your nerves and blood cells work. You get it from meat, fish, eggs, and dairy. If you take metformin for diabetes or a proton pump inhibitor for acid reflux, your body absorbs less B12 from food. Symptoms of low B12 — tingling in your feet, confusion, fatigue — can take months or years to show up, and by then the damage may be harder to reverse. A blood test can measure your B12 level.

Vitamin D helps your bones stay strong and your immune system work. Your skin makes it from sunlight, but after 60, your skin is less efficient at this. If you live in a northern climate, spend most of your time indoors, or have dark skin, you likely make very little vitamin D. Fatty fish (salmon, mackerel, sardines), egg yolks, and fortified milk contain some, but most people over 70 need a supplement. A blood test shows your vitamin D level.

Calcium keeps your bones dense. Women lose bone density quickly after menopause; men lose it more slowly but still do. Dairy products, leafy greens, and fortified plant milks contain calcium. If you cannot eat enough of these foods — because of lactose intolerance, cost, or preference — a supplement may help. Calcium works best when paired with vitamin D and weight-bearing exercise.

Iron carries oxygen in your blood. Older adults need less iron than younger people, but some still run low — especially women who have had heavy periods, people with digestive disorders, or those taking blood thinners. Too much iron can damage your heart and liver, so a blood test should guide whether you need a supplement.

Food First, Supplements Second

A piece of baked salmon gives you vitamin D, selenium, omega-3 fatty acids, and protein in one meal. A cup of plain yogurt with berries gives you calcium, vitamin D (if fortified), probiotics, and fiber. A handful of almonds gives you calcium, magnesium, and vitamin E. When you can get nutrients from food, your body absorbs them better and you avoid the risk of taking too much.

Supplements are useful when food sources are not realistic for you. If you cannot eat dairy because of lactose intolerance, a calcium supplement makes sense. If you live where winter lasts six months and you spend your days indoors, a vitamin D supplement is reasonable. If you are vegetarian and do not eat fortified cereals, a B12 supplement may be necessary. The question is not whether supplements are good or bad — it is whether they fill a real gap in your diet.

A registered dietitian can look at a typical day of eating and tell you which nutrients you are getting enough of and which you are not. Many insurance plans cover one or two visits with a dietitian if your doctor refers you. Some senior centers and community health clinics offer free nutrition consultations.

How Supplements Interact With Medications

Some supplements change how your medications work. Vitamin K, found in leafy greens and some supplements, can reduce the effect of warfarin (a blood thinner). Calcium supplements can prevent your body from absorbing certain antibiotics or osteoporosis drugs — you have to take them at different times of day. Vitamin E in high doses can increase bleeding risk if you take aspirin or other blood thinners. Ginkgo biloba, often taken for memory, can also increase bleeding risk.

Your doctor or pharmacist needs to know every supplement you take — not just prescription medications. Write down the name, dose, and how often you take it. Bring the bottles to your appointments. If you start a new supplement, tell your doctor before you take it, especially if you take blood thinners, heart medications, or diabetes drugs.

Some interactions are serious; others are minor. A pharmacist can review your complete list and flag real problems. Do not stop taking a medication because you read that a supplement might interfere — talk to your doctor first about whether the interaction matters for you.

When More Is Not Better

Your body can only use so much of a vitamin. Water-soluble vitamins — B vitamins and vitamin C — are not stored; your body excretes what it does not use. Taking extra B vitamins or vitamin C beyond what you need wastes money. Fat-soluble vitamins — A, D, E, and K — are stored in your body fat. Taking too much can build up to toxic levels.

High doses of vitamin A can weaken your bones and cause liver damage. Too much vitamin D can raise calcium levels in your blood, leading to kidney stones and heart problems. Excess iron damages your heart and liver. High-dose vitamin E increases bleeding risk. The label on a supplement bottle may say a dose is safe, but safe for whom — a 30-year-old or a 75-year-old taking five medications? Your doctor can tell you what dose makes sense for you.

Multivitamins marketed to seniors often contain amounts that are reasonable, but they may include nutrients you do not need and miss ones you do. A targeted approach — taking only what your blood work and diet show you need — is usually smarter than a one-size-fits-all multivitamin.

Questions to Ask Your Doctor

Before you start any supplement, ask your doctor these questions: Do my blood tests show I am low in this nutrient? Will this supplement interact with any of my medications or other supplements? What dose should I take? How long should I take it before we check my blood levels again? Are there foods I could eat instead?

If your doctor says you do not need a supplement, ask why — sometimes the answer is that your diet is already meeting your needs, and sometimes it is that the risk of interaction is too high. If your doctor recommends a supplement, ask whether a generic version works as well as a brand name (usually it does) and where to buy it.

Bring a list of all supplements you are considering or already taking to every appointment. If you see multiple doctors, make sure each one knows what the others have recommended.

Reading Labels and Choosing Products

The label on a supplement bottle tells you the amount of the nutrient per dose, the form it is in (for example, vitamin D2 versus D3, or calcium citrate versus calcium carbonate), and any other ingredients. The form matters: vitamin D3 (cholecalciferol) is more effective than D2 (ergocalciferol). Calcium citrate is easier to absorb than calcium carbonate, especially if you take acid reflux medication.

Look for products that have been tested by a third party — USP (U.S. Pharmacopeia), NSF International, or ConsumerLab are common certifications. These organizations test whether the bottle actually contains what the label says and whether it is free of contaminants. The FDA does not review supplements before they are sold the way it reviews medications, so third-party testing is your assurance of quality.

Generic and store-brand supplements are usually just as good as name brands and cost less. Price is not a sign of quality. A supplement that costs twice as much does not work twice as well.

When to Talk to Your Doctor About Supplements

See your doctor before starting a supplement if you take blood thinners, heart medications, diabetes drugs, or any medication you have been on for years. See your doctor if you have kidney disease, liver disease, or a history of kidney stones. See your doctor if you are about to have surgery — some supplements increase bleeding risk and should be stopped beforehand. See your doctor if you are over 75 or take more than five medications.

If you notice new symptoms after starting a supplement — nausea, dizziness, unusual bruising, or changes in how your medications seem to work — stop the supplement and call your doctor. Keep a straightforward log of what you take and when, so you can spot patterns if something does not feel right.

Frequently Asked Questions

Do I need a multivitamin if I eat a healthy diet?

Not necessarily. A blood test can show whether you are getting enough of the key nutrients. If your diet includes a variety of vegetables, fruits, whole grains, protein, and dairy or fortified alternatives, you may not need a multivitamin. If you have dietary restrictions — vegetarian, vegan, dairy-free — or a condition that affects absorption, a targeted supplement may help more than a multivitamin.

Is it safe to take supplements long-term?

It depends on the supplement and the dose. Some — like vitamin D and calcium — are safe to take long-term if the dose is appropriate for you. Others, like high-dose vitamin A or E, should not be taken long-term without medical supervision. Your doctor should review your supplements yearly and order blood tests to check whether you still need them and whether levels are in a safe range.

Can supplements replace medication?

No. Supplements support nutrition; they do not treat disease the way medications do. If your doctor prescribed a medication for high blood pressure, heart disease, or diabetes, a supplement cannot replace it. Some supplements may help alongside medication — for example, calcium and vitamin D support bone health while a bisphosphonate medication treats osteoporosis — but always follow your doctor's treatment plan.

What is the difference between a supplement and a medication?

Medications are tested in clinical trials, reviewed by the FDA, and approved to treat or prevent a specific disease. Supplements are not reviewed the same way and cannot claim to treat disease. A supplement can say "supports bone health," but it cannot say "treats osteoporosis." If a product claims to cure or treat a disease, it is being marketed illegally as a medication.

How do I know if a supplement is working?

Some effects take time — vitamin D and calcium build bone density over months, not weeks. Others show up in blood tests: B12 levels, vitamin D levels, iron stores. Ask your doctor what sign would show the supplement is working and when to recheck. If you have been taking a supplement for three months and see no improvement and your blood work shows your level is now normal, you may be able to stop it or lower the dose.