Are Multivitamins a Waste of Money?

The U.S. multivitamin market generates over $8 billion annually. An estimated one in three Americans takes a multivitamin every day. In 2022, the U.S. Preventive Services Task Force (USPSTF) published its updated recommendation: multivitamin supplementation provides no meaningful benefit for reducing cardiovascular disease or cancer in healthy adults, and there is insufficient evidence to recommend it for overall mortality. For many, this was a headline that deserved more nuance than it received.

What the USPSTF Actually Said

The 2022 USPSTF statement reviewed evidence across 84 studies and concluded that for multivitamins the current evidence is insufficient to judge whether benefits outweigh harms for preventing cardiovascular disease or cancer in generally healthy, non-pregnant adults (an "I statement," not a recommendation against). The Task Force recommended against using beta-carotene or vitamin E supplements for this purpose because of net harm at supplemental doses. That conclusion applies specifically to primary disease prevention in otherwise healthy people eating a reasonably varied diet. It does not apply to people with documented deficiencies, those on calorie-restricted diets, people with malabsorption disorders, older adults with reduced gastric acid and dietary variety, or people on medications that deplete specific nutrients.

Who Actually Benefits From a Multivitamin

For several populations, a multivitamin remains a reasonable low-cost insurance policy. Older adults (65+) frequently have inadequate intake of B12, vitamin D, and zinc due to reduced appetite, lower gastric acid production, and decreased outdoor activity. Strict vegetarians and vegans are at high risk for B12, iron, zinc, and iodine insufficiency. People on long-term metformin therapy deplete B12. Bariatric surgery patients have impaired absorption of multiple micronutrients and require lifelong supplementation. Pregnant women benefit from folate, iron, and iodine above dietary levels. For these groups, a basic multivitamin or targeted supplementation is well-supported.

The Problem With Most Multivitamin Products

Even when supplementation is warranted, most multivitamins are poor products. They typically use cheap, poorly-absorbed mineral forms (magnesium oxide, zinc oxide, ferrous sulfate) at doses too low to correct deficiency, while including high doses of fat-soluble vitamins that accumulate. The iron and calcium in many multivitamins compete for absorption. Many contain vitamin K1 instead of the more bioactive K2 form. Premium multivitamins that use chelated minerals and active vitamin forms (methylcobalamin for B12, methylfolate for folate, cholecalciferol for D3) are significantly more effective — and significantly more expensive. If you take a multivitamin, the form of each ingredient matters as much as the presence of it.

The Bottom Line

For a healthy adult eating a varied diet, a daily multivitamin is unlikely to prevent disease or meaningfully extend life. The USPSTF conclusion is correct in that context. But "not beneficial for primary disease prevention in healthy adults" is a far more specific claim than "waste of money for everyone." If you're in a higher-risk group for specific deficiencies, targeted supplementation — or a high-quality multivitamin — remains sensible. If you're not, spending the same money on vegetables is probably the better investment.