Vitamins and Supplements for Older Adults
Which nutrients older adults are most often advised to ask about (B12, vitamin D, calcium, vitamin A), UK amounts and upper levels, what trials found, and how to keep a long pill list safe.
Content last updated . This page has not been medically reviewed.
Overview
The US National Institute on Aging (NIA) says eating a variety of healthy foods is the best way to get nutrients, and that doctors may recommend a supplement when someone is not getting enough. [1] It also says it is usually better to get nutrients from food than from a pill, because food contains other helpful things such as fiber. [2] This page covers the few nutrients most often raised in later life, how official advice differs by country, and how to keep a growing list of pills safe. It is not personal advice.Nutrients most often discussed
| Nutrient | Why it comes up | Official amounts and cautions (UK, NHS) |
|---|---|---|
| Vitamin B12 | NIA says older adults need as much as other adults, but some have trouble absorbing the B12 naturally found in food. [1] The NHS says B12 or folate deficiency affects around 1 in 10 people aged 75 or over and 1 in 20 aged 65 to 74, and that medicines including proton pump inhibitors (PPIs) and anticonvulsants can affect absorption. [3] | Adults 19 to 64 need about 1.5 mcg a day; 2 mg or less a day of supplements is unlikely to cause harm (NHS, undated page read 2026). [4] The page gives no separate figure for people over 64. |
| Vitamin D | The NHS says everyone should consider a daily supplement in autumn and winter, and people who are frail, housebound or in a care home should take one all year. [5] | 10 mcg a day; do not take more than 100 mcg (4,000 IU) a day (NHS, 2020). [5] |
| Calcium | Works with vitamin D for strong bones. [1] | Adults 19 to 64 and over need 700 mg a day; more than 1,500 mg a day could cause stomach pain and diarrhea (NHS, 2020). [6] |
| Vitamin A | Many multivitamins contain it. [7] | The NHS advises women past menopause and older men to avoid more than 1.5 mg a day from food and supplements combined, because of osteoporosis risk (NHS, 2020). [7] |
| Folic acid | Doses above 1 mg can mask the symptoms of vitamin B12 deficiency; the NHS calls this a particular concern for older people. [4] | 1 mg or less a day of supplements is unlikely to cause harm (NHS, undated page read 2026). [4] |
US intake figures (RDA and upper levels) for people over 50 come from the NIH Office of Dietary Supplements. We could not read that site this session and do not quote them from memory. Do not guess a deficiency from tiredness or forgetfulness: the NHS says B12 and folate deficiency can be diagnosed from symptoms and a blood test, and some problems can become permanent if untreated, so see a clinician. [3] See vitamin B12 deficiency and vitamin D deficiency and testing.
What trials show
| Question | What the source found | Label |
|---|---|---|
| Fractures, vitamin D and calcium in healthy community-dwelling postmenopausal women (US task force, 2018) | Adequate evidence that 400 IU or less of vitamin D with 1,000 mg or less of calcium has no benefit for preventing fractures, and that vitamin D plus calcium increases kidney stones. It does not apply to people with osteoporosis, past fractures, higher fall risk or vitamin D deficiency. [8] | Evidence in adequately nourished people |
| Thinking and memory with a daily multivitamin-mineral (COSMOS-Mind, 2,262 people, mean age 73, 3 years) | Statistically significant benefit on a global cognition score (mean z 0.07, 95% CI 0.02 to 0.12). [9] | Promising but limited |
| Preventing Alzheimer's or cognitive decline | NIA: no vitamin or supplement is recommended for this. [10] | Insufficient evidence |
| B vitamins and cognitive decline | A 2022 meta-analysis found B vitamins slowed decline on one test score. [11] A 2020 review found no overall evidence they prevented decline. [12] | Mixed |
A 2026 rapid review of meta-analyses found that randomized trials of multivitamin-mineral products improved global cognition and memory in older adults but showed no benefit for all-cause mortality, and reported a higher risk of age-related macular degeneration progression. [13] Findings depend on the population, so they do not transfer to everyone.
Medicines and "pill burden"
Supplements can interact with prescriptions. NIA gives the example that vitamin K can reduce the ability of the blood thinner warfarin to prevent clotting, and that some supplements can raise bleeding risk after an injury or change the response to anesthesia during surgery. [2] Kidney and liver conditions are not covered in the sources we read for this page, so ask a clinician before adding anything if you have either. Keep one written list of everything you take and bring it to appointments. [1] Read medication interactions, older adults safety and supplements before surgery. Wellness covers medicines and supplement burden and healthy aging.Choosing a product
NIA suggests looking for a supplement with the vitamin or mineral you need without many unnecessary ingredients, checking that the dose is not too large, and avoiding megadoses. [2] It also says not to buy supplements with ingredients you do not need, and not to assume that more is better. [1] Ask your doctor, pharmacist or dietitian first. See how to evaluate a supplement formula and quality testing and certifications.Frequently asked questions
Should older adults take a multivitamin?
Not automatically. COSMOS-Mind found a small benefit on a thinking score, but NIA does not recommend any supplement for preventing cognitive decline. [9][10]
Why is B12 a concern with age?
Some older adults absorb B12 from food poorly, and medicines such as PPIs can affect absorption. [1][3]
Is more calcium better for bones?
Not in the studied group. Calcium at 1,000 mg or less with 400 IU or less of vitamin D showed no fracture benefit and raised kidney stones. [8] Ask a clinician if you have osteoporosis.
Can supplements affect my medicines?
Yes. Vitamin K and warfarin is one example. [2]
Can folic acid help my memory?
Proper evidence not found that folic acid alone does; we looked at NIA, the NHS and PubMed reviews of B vitamins, which were mixed. [11][12] The NHS warns that more than 1 mg a day of folic acid can mask B12 deficiency. [4]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
How to read the evidence labels
Labels used on this page: established nutritional role / deficiency treatment, evidence in adequately nourished people, promising but limited, mixed, insufficient evidence.
References
- NIA: Dietary Supplements for Older Adults. Read 2026-10-22.
- NIA: Vitamins and Minerals for Older Adults. Read 2026-10-22.
- NHS: Vitamin B12 or folate deficiency anaemia. Read 2026-10-22.
- NHS: B vitamins and folic acid. Read 2026-10-22.
- NHS: Vitamin D. Read 2026-10-22.
- NHS: Calcium. Read 2026-10-22.
- NHS: Vitamin A. Read 2026-10-22.
- USPSTF recommendation statement, Vitamin D, Calcium, or Combined Supplementation for the Primary Prevention of Fractures in Community-Dwelling Adults (JAMA 2018). Read 2026-10-22.
- COSMOS-Mind: Effects of cocoa extract and a multivitamin on cognitive function, randomized clinical trial (Alzheimer's & Dementia 2023). Read 2026-10-22.
- NIA: What Do We Know About Diet and Prevention of Alzheimer’s Disease?. Read 2026-10-22.
- Meta-analysis, B vitamins and prevention of cognitive decline and incident dementia (Nutrition Reviews 2022). Read 2026-10-22.
- Systematic review and meta-analysis, Vitamin B: can it prevent cognitive decline? (Systematic Reviews 2020). Read 2026-10-22.
- Rapid review of meta-analyses, Multivitamin and mineral use and health outcomes (Ageing Research Reviews 2026). Read 2026-10-22.