Are multivitamins worth taking, or are you just paying for expensive urine?
The honest answer: for a healthy adult who eats a varied diet, a daily multivitamin is mostly insurance — and yes, you do pee out the water-soluble vitamins you don't need. But "expensive urine" is too dismissive. A multivitamin helps cover common dietary micronutrient gaps, it is cheap, and for specific groups the evidence is more interesting than the cynics admit. A solid daily base such as SELF Multivitamin 60caps or OstroVit 100% VIT&MIN 30 tabs is a reasonable low-cost safety net — not a miracle, not a scam.
If you take just one daily foundation supplement, which fits your needs?
Browse the rangeThe supplement almost everyone buys first
Multivitamins are the gateway supplement: convenient, familiar, and marketed as "foundational nutrition". That popularity is exactly why the "expensive urine" line caught on — if everyone takes one and most people are healthy, surely it does nothing? The reality is more nuanced. A multivitamin is only useful to the extent it fills a gap you actually have.
Where experts disagree
Nutrition scientists genuinely debate this. One camp points to large studies showing little benefit for all-cause mortality or heart disease in well-nourished populations. The other camp notes that those same populations often aren't as well-nourished as assumed, and that specific outcomes — like cognition in older adults — tell a different story.
Both are right about different things. A multivitamin won't lengthen the life of a healthy 30-year-old who eats well. It may still be worth it for someone with a restricted diet, low sun exposure, or higher age.
What the science actually shows
The most interesting recent data comes from the 3-year COSMOS-Mind randomised trial. In 2,262 older adults, a daily multivitamin-mineral significantly improved global cognition versus placebo (p=0.007), with a larger benefit in those with cardiovascular disease (Baker et al., 2023). That is a defensible "worth it for older adults and dietary gaps" line, not proof that everyone needs one.
For the nutrients people are genuinely short on at northern latitudes, the case is stronger:
- Vitamin D: standardised data on 55,844 Europeans found 13% below 30 nmol/L year-round, climbing toward 40% below 50 nmol/L in winter (Cashman et al., 2016). The Endocrine Society guideline suggests adults need roughly 1,500–2,000 IU/day to stay above 30 ng/mL (Holick et al., 2011). A multivitamin's small D dose may not be enough on its own.
- Omega-3, often missing from diets, has solid cardiovascular data: EPA+DHA lowered triglycerides by about 0.37 mmol/L dose-dependently (AbuMweis et al., 2018). A dedicated NOW Omega 3 1000mg 500 Soft Gels does this better than a multivitamin.
| Group | Is a multivitamin worth it? |
|---|---|
| Healthy adult, varied diet | Low-value insurance — fine, not essential |
| Restricted/low-calorie diet | Genuinely useful gap-filler |
| Older adults | Evidence for cognition support (Baker 2023) |
| Northern winters | Helpful, but pair with dedicated vitamin D |
Practical takeaways
- Diet first. No pill replaces real food. Use a multivitamin to back up a good diet, not excuse a poor one.
- Don't megadose. With water-soluble vitamins, excess really does leave in urine; with fat-soluble ones (A, D, E, K) excess can accumulate, so stay near label doses.
- Layer the strong singles. If you only buy one or two things, dedicated vitamin D and omega-3 often beat a generic multi.
- Match it to you. Active people, older adults and restricted eaters get the most value.
Browse the vitamin complexes category, creatine and omega-3 at maxfit.ee to build a base that fits your diet.
How to read a multivitamin label without getting fooled
Labels are where good and pointless products separate. A few habits help:
- Look at percentages near 100% of the reference intake, not 1,000%. Megadoses of water-soluble vitamins mostly leave in urine and add cost, not benefit.
- Check the form of key minerals. Chelated or citrate forms of magnesium and zinc are generally better tolerated and absorbed than cheap oxides.
- Watch the fat-soluble vitamins. A (retinol), D, E and K accumulate, so a sensible multi keeps these near, not far above, reference intakes.
- Ignore proprietary blends that hide individual doses behind a single total — you can't tell if anything is dosed usefully.
The goal isn't the flashiest label; it's a tablet you'll take consistently that fills your actual gaps without overshooting.
Who probably doesn't need one
It's worth saying plainly: a healthy adult who eats a varied diet with plenty of vegetables, fruit, protein and oily fish may get little measurable benefit from a daily multivitamin, and that's fine. For this person, money is often better spent on a dedicated winter vitamin D, an omega-3 if fish intake is low, and creatine if they train. A multivitamin becomes more valuable as diet quality, food variety or sun exposure drops.
The bottom line
A multivitamin is not magic and not a scam. For a well-fed healthy adult it is cheap insurance; for older adults, restricted eaters and people in dark winters it can be genuinely worthwhile. Eat well first, then fill the real gaps.
References
Baker LD, Manson JE, Rapp SR, et al. (2023). Effects of cocoa extract and a multivitamin on cognitive function: A randomized clinical trial. Alzheimer's & Dementia, 19(4), 1308–1319. https://doi.org/10.1002/alz.12767
Cashman KD, Dowling KG, Škrabáková Z, et al. (2016). Vitamin D deficiency in Europe: pandemic? American Journal of Clinical Nutrition, 103(4), 1033–1044. https://pubmed.ncbi.nlm.nih.gov/26864360/
Holick MF, Binkley NC, Bischoff-Ferrari HA, et al. (2011). Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism, 96(7), 1911–1930. https://pubmed.ncbi.nlm.nih.gov/21646368/
AbuMweis S, Jew S, Tayyem R, Agraib L. (2018). Eicosapentaenoic acid and docosahexaenoic acid containing supplements modulate risk factors for cardiovascular disease: a meta-analysis of randomised placebo-controlled trials. Journal of Human Nutrition and Dietetics, 31(1), 67–84. https://pubmed.ncbi.nlm.nih.gov/28675488/
FAQ
Do you really just pee out multivitamins?
Partly. Excess water-soluble vitamins (B and C) do leave in urine, but minerals and fat-soluble vitamins are stored. The body keeps what it needs, so a multivitamin still fills genuine gaps.
Who benefits most from a multivitamin?
Older adults, people on restricted or low-calorie diets, and those with little winter sun. For a healthy adult eating a varied diet, it is more insurance than necessity.
Is one strong vitamin D better than a multivitamin?
For northern winters, often yes. A multivitamin's vitamin D dose is usually small, so a dedicated vitamin D — and an omega-3 — may add more value.
