Medically Reviewed By:

Dr. Ahmed Farhan MBBS, FCPS (Internal Medicine) | Assistant Professor of Medicine | Consultant Physician | Specialist in Diabetes, Weight Management & Lifestyle Medicine Founder of Dibesity | Advocate of Evidence-Based Natural Health

Look in the kitchen cabinet of almost any home with someone over 50 in it. You will probably find a few bottles. Vitamin D. Calcium. Maybe fish oil, or a daily multivitamin.

You are in good company. A 2026 study of supplement use in the United States found that use among adults 65 and older rose from about 62% to 78% over roughly 25 years. That was the biggest jump of any group in the study.

But are these pills doing what we hope? In 2026, two big pieces of research gave very different answers. One says calcium and vitamin D pills do little for your bones.

The other says a daily multivitamin may help older adults keep their memory and their independence. Both can be true. Here is what the best evidence says about the supplements people over 50 ask about most.

Why this topic is in the news right now

In May 2026, researchers in Canada published a very large review in The BMJ, a respected medical journal.

They looked at calcium and vitamin D pills and asked a simple question. Do these pills prevent broken bones and falls? For most older people, the answer was no, at least not in a way that matters.

The news spread fast because so many people take these pills. Doctors, health guidelines, and government agencies have recommended them for years. The authors said those recommendations should now be looked at again.

Then, in late July 2026, a team at Augusta University shared new results at a nutrition science meeting.

They found that adults over 60 who took a daily multivitamin reported better everyday health after three years. That result is early. It has not yet been published in a journal, so scientists treat it as preliminary.

What the latest research says

Calcium and vitamin D: strong evidence of little benefit for bones

The BMJ team did not run a new experiment. They did a meta-analysis. That means they gathered the best experiments they could find and combined the results. It is like asking 69 different teams the same question and then adding up their answers.

In total, the review covered 69 randomized trials and almost 154,000 adults. In a randomized trial, people are picked by chance to get either the real pill or a fake one. That makes the comparison fair.

The results were clear. Calcium pills, vitamin D pills, and the two together all showed little to no helpful effect on broken bones.

The researchers rated their confidence as high for vitamin D and for the two combined. They rated it as moderate for calcium alone. The review also found little to no clear benefit for preventing falls.

The authors said guideline groups and health agencies should re-check their general advice about these supplements.

Evidence quality: Established. This comes from a large review of randomized trials, with high-certainty results for vitamin D and for the combination.

Vitamin B12: a real need for some people

Vitamin B12 helps your body make DNA and keeps your nerve cells healthy. It comes naturally only from animal foods, such as meat, fish, eggs, and dairy.

Here is the twist after 50. Many older adults make less stomach acid. Your body needs that acid to pull B12 out of food.

The National Institutes of Health (NIH) says B12 deficiency affects between 3% and 43% of older adults. That is a huge range, because studies measure it in different ways.

The NIH also says people over 50 should get most of their B12 from fortified foods or supplements. Those forms are easier for the body to absorb. Fortified foods are ones with extra vitamins added, such as some breads and cereals.

Some medicines can also lower B12. The NIH lists metformin, a common diabetes medicine, and drugs that reduce stomach acid. If you take one of these, it is fair to ask your doctor whether your B12 should be checked. Do not stop any medicine on your own.

What B12 pills probably won’t do is give you a boost of energy if your levels are already fine. Mayo Clinic says there is no proof that B12 pills or shots raise energy or improve athletic performance.

The NIH adds that more trials are needed to know whether B12 helps thinking and memory in older adults.

Evidence quality: Established for preventing and fixing low B12. Unproven for brain or energy benefits in people who are not low.

Multivitamins: a small but interesting signal

COSMOS is one of the biggest tests of multivitamins in older adults. It enrolled 21,442 adults in the United States who were 60 or older. People were picked by chance to take a multivitamin, a cocoa extract, both, or fake pills.

In 2024, the team combined three separate parts of the trial that measured memory and thinking. People who took the multivitamin did better than people who took fake pills on both memory and overall thinking skills.

One news report described the memory gain as similar to being nearly five years younger. The researchers called the benefit for overall thinking modest.

There is an important catch. The trial used one brand, Centrum Silver. Other multivitamins might not give the same results.

The July 2026 results looked at more than 16,000 adults over 60. After three years, the multivitamin group reported better day-to-day functioning.

That means things like walking, climbing stairs, dressing, and doing chores. News coverage described the overall benefit as modest.

One of the researchers said a multivitamin is not a substitute for a good diet or exercise. These results were presented at a meeting and have not yet been published in a journal.

Evidence quality: Emerging. The memory results come from several parts of one large trial. The everyday-function results are preliminary.

Omega-3 fish oil: mixed results

Fish oil is rich in omega-3 fats. Many people over 50 take it hoping to protect the heart. The best test in a general group of people is the VITAL trial.

It enrolled 25,871 adults in the United States who were 50 or older. They took 1 gram a day of omega-3 or a fake pill for about five years.

The main goal of VITAL was to cut major heart events. That means heart attack, stroke, or death from heart disease.

Omega-3 did not meaningfully lower that combined number. But it did lower heart attacks on their own.

The rate of heart attacks was about 28% lower. Fewer people also needed a procedure to open a blocked artery. These were side findings of the trial, so they need more testing before anyone treats them as proven.

There is also a worry about heart rhythm. Atrial fibrillation, or AFib, is an uneven heartbeat. In VITAL, fish oil did not raise or lower the risk of AFib.

A follow-up study of the same trial found the same thing. About 3.6% of people developed AFib, with no real difference between the groups.

But a combined analysis of many trials, covering about 81,000 people, found that fish oil was linked to a roughly 25% higher rate of AFib.

Some of those trials used much higher doses. Some included people who already had heart problems or high blood fats. So the results may not apply to everyone.

Evidence quality: Mixed. There are possible heart benefits and a possible rhythm risk, and the trials do not agree.

Creatine: good evidence for muscle, when paired with lifting

Creatine is a natural substance found in muscle cells. It is also sold as a powder.

A 2017 meta-analysis pooled 22 trials with 721 people. Their average ages ranged from 57 to 70. Everyone lifted weights two or three days a week.

Those who also took creatine gained about 1.4 kilograms (about 3 pounds) more lean tissue than those who took a fake pill. Lean tissue is mostly muscle. They also gained more strength on the chest press and the leg press.

A 2014 review found no change in body fat. A newer 2025 review of 8 trials and 482 people also found gains in strength and lean tissue, mainly in programs lasting up to about 32 weeks.

Here is the key detail. These studies tested creatine along with weight training. They do not show what creatine does on its own.

Evidence quality: Moderate to strong for gains in muscle and strength when combined with resistance training. Not shown for creatine alone.

What it means for blood sugar, weight, and metabolic health

First, B12 matters for people with diabetes. Metformin is one of the most common diabetes medicines, and the NIH says it may lower B12 absorption. A simple conversation with your doctor can catch a problem early.

Second, muscle matters. Muscle is one of the main places your body uses sugar from food. Keeping and building muscle as you age is a smart goal for anyone who is watching their blood sugar. Weight training helps, and the creatine studies suggest a powder may add a little on top of it.

What we know

For most older adults, calcium and vitamin D pills do not meaningfully lower the chance of broken bones or falls. This is based on high-certainty evidence for vitamin D and the combination.
People over 50 often absorb B12 poorly from food, and getting B12 from fortified foods or supplements works.
Creatine plus weight training builds more lean tissue and strength than weight training alone.
A daily multivitamin, in one big trial with one brand, gave older adults a small boost in memory and thinking.
Supplements can interact with medicines, and older adults are more likely to take several medicines.

What we don’t know

Whether the multivitamin results apply to other brands. COSMOS tested only one.
Whether the July 2026 everyday-function results will hold up once they are published and checked by other scientists.
Whether B12 pills protect memory in older adults who are not low in B12. The NIH says more trials are needed.
Whether low-dose fish oil is truly safe for heart rhythm in everyone, or only in some groups.
Whether calcium and vitamin D still help people who are truly low in them. The BMJ review looked at general use, and an earlier trial in women who started with very low vitamin D and little calcium did find fewer fractures.

Common misconceptions

“More supplements means better health.” Not so. Some supplements show no clear benefit in large trials, and some may carry a small risk. The AFib findings with fish oil are one example.

“Natural means safe.” Fish oil is natural, and some analyses still link it to more AFib. Natural products can interact with medicines too. Always tell your doctor and pharmacist what you take.

“A pill can make up for a poor diet or no exercise.” Researchers on the multivitamin study said it is not a substitute for good food or exercise. Strength and balance exercise cut falls by close to a quarter in the review described by news coverage.

Who should pay extra attention?

People who take metformin or stomach-acid medicines, because these can lower B12.
People who eat no animal foods. B12 comes naturally only from animal foods, so vegetarians and vegans may find B12 supplements helpful.
People who have been told they have low vitamin D, weak bones, or osteoporosis. The BMJ review is about general use, not about a diagnosed problem.
People who take several medicines. A pharmacist can check for clashes.
People with heart rhythm problems or heart disease, who should talk with their doctor before starting fish oil.

Practical, evidence-based steps

Start with food and movement. Strength and balance exercises have strong support for lowering falls. Fortified foods can help with B12.
Ask what you actually need. Instead of guessing, ask your doctor whether a blood test for B12 or vitamin D makes sense for you, especially if you take metformin or a stomach-acid medicine.
Make a list of everything you take. Include vitamins, powders, and herbal products. Bring the bottles to your pharmacist and ask about interactions.
Be wary of “supplement stacks” and big promises. The strongest evidence is narrow and specific. It is not a long list of pills.
If you lift weights, creatine is one of the few supplements with good evidence for added muscle. Ask your doctor first if you have a long-term health condition.
Do not stop a prescribed medicine or supplement because of an article. If you think your routine should change, talk with your doctor first.

Frequently asked questions

Do I need a multivitamin after 50?

Not everyone does. The best results so far come from one big trial that used one brand and found modest benefits for memory and thinking.

A good first step is to ask whether your food already covers your needs. Your doctor or pharmacist can help you decide.

Should I stop taking calcium and vitamin D?

Please do not stop on your own. The BMJ review looked at general use in older adults, mainly to prevent broken bones and falls.

It is not a verdict on every person. If a doctor told you to take them for a specific reason, ask whether that advice still fits you.

Why is it harder to get enough B12 as I get older?

Many older adults make less stomach acid, and the body needs that acid to release B12 from food. B12 in fortified foods and supplements does not need that step, so it is easier to absorb.

Is fish oil safe after 50?

At the dose used in the VITAL trial, fish oil did not raise or lower the risk of AFib. But a combined analysis of many trials linked fish oil to a higher AFib rate, and some of those trials used high doses. If you have heart problems or take heart medicines, ask your doctor first.

Does metformin affect vitamins?

The NIH says metformin might reduce B12 absorption and lower B12 levels in the blood. Ask your doctor whether a B12 check makes sense for you. Do not change your medicine on your own.

Conclusion

Supplements after 50 are not all good or all bad. The best evidence is more specific than the labels on the bottles.

Calcium and vitamin D pills show little benefit for bones in most older adults. B12 is a real need for many people over 50, and especially for those on metformin or acid-lowering drugs.

A daily multivitamin looks promising for memory, but that evidence is still young. Fish oil has mixed results. Creatine helps build muscle when you also lift weights.

The most useful move is simple. Ask your doctor or pharmacist what you truly need, and put your effort where the evidence is strongest: good food, strength training, and balance exercise.

This article is for general information. It is not medical advice, and it cannot diagnose or treat any condition.

References

Calcium, vitamin D, or combined supplementation to prevent fractures and falls: systematic review and meta-analysis. BMJ. 2026;393:e088050. doi:10.1136/bmj-2025-088050. Summary: https://bmjgroup.com/calcium-and-vitamin-d-supplements-offer-little-to-no-meaningful-benefit-on-fracture-and-fall-prevention/ [Link]
NIH Office of Dietary Supplements. Vitamin B12: Fact Sheet for Consumers. https://ods.od.nih.gov/factsheets/VitaminB12-Consumer/
Mayo Clinic. Vitamin B-12. https://www.mayoclinic.org/drugs-supplements/vitamin-b12/art-20360463
Clemson Cooperative Extension, Home & Garden Information Center. Vitamin B12 (adapted from the Dietary Reference Intakes). https://hgic.clemson.edu/factsheet/vitamin-b12
Effect of multivitamin-mineral supplementation versus placebo on cognitive function: results from the clinic subcohort of the COSMOS randomized clinical trial and meta-analysis of 3 cognitive studies within COSMOS. Am J Clin Nutr. 2024. doi:10.1016/j.ajcnut.2023.12.011. https://pmc.ncbi.nlm.nih.gov/articles/PMC11103094/
COSMOS trial results page. https://cosmostrial.org/results/
Augusta University / Medical College of Georgia. A daily multivitamin may help older adults maintain functional health (presented at NUTRITION 2026, July 27, 2026; preliminary, not yet peer reviewed). https://www.newswise.com/articles/a-daily-multivitamin-may-help-older-adults-maintain-functional-health
Marine omega-3 fatty acid supplementation and prevention of cardiovascular disease: update on the randomized trial evidence (VITAL). Cardiovasc Res. https://pmc.ncbi.nlm.nih.gov/articles/PMC10262192
Effect of long-term marine omega-3 fatty acids supplementation on the risk of atrial fibrillation in randomized controlled trials of cardiovascular outcomes: a systematic review and meta-analysis. https://pmc.ncbi.nlm.nih.gov/articles/PMC9109217/
VITAL Rhythm Trial: fish oil and vitamin D supplements and atrial fibrillation (AHA Scientific Sessions 2020; coverage). https://cardiovascularbusiness.com/topics/clinical/heart-rhythm/fish-oil-vitamin-d-prevent-atrial-fibrillation
Chilibeck PD, et al. Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis. Open Access J Sports Med. 2017;8. https://pmc.ncbi.nlm.nih.gov/articles/PMC5679696
Devries MC, Phillips SM. Creatine supplementation during resistance training in older adults: a meta-analysis. Med Sci Sports Exerc. 2014;46(6):1194-1203. https://pubmed.ncbi.nlm.nih.gov/24576864/
The impact of creatine supplementation associated with resistance training on muscular strength and lean tissue mass in the aged: a systematic review and meta-analysis (2025). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12752335/
Emerging Patterns in Dietary Supplement Use Among US Adults, 1999-2023. JAMA Netw Open. 2026;9(6):e2619291. doi:10.1001/jamanetworkopen.2026.19291. Author interview: https://medicalresearch.com/?p=74328
Earth.com. Most older adults gain little from calcium and vitamin D supplements, despite decades of bone health advice (news coverage, June 23, 2026; used for the exercise-and-falls comparison and the earlier low-vitamin-D trial). https://www.earth.com/news/most-older-adults-gain-little-from-calcium-and-vitamin-d-supplements-despite-decades-of-bone-health-advice/