Experts Warn Popular Longevity Supplements May Be Little More Than Expensive Placebos
Influencers may claim 'it works for me,' but what’s likelier, experts say, is a pricey placebo effect — that is, the belief that a certain supplement is improving health.
Scroll through any wellness influencer's feed and you are likely to find a carefully curated supplement stack — bottles of NMN, resveratrol, spermidine, and a dozen other compounds promising to slow aging and extend a healthy lifespan. But leading health experts say the science behind most of these products is far shakier than the confident testimonials suggest.
The placebo effect, researchers warn, is a powerful force that can make believers genuinely feel better after taking a supplement, even when the pill contains nothing clinically proven to deliver results. When an influencer says a product 'works for me,' what they may be experiencing is the brain's own capacity to generate a sense of well-being in response to the expectation of benefit.
'People invest a lot of money and emotional energy into these regimens,' said one longevity researcher familiar with the supplement industry. 'That investment alone can create a perception of improved energy, focus, and health — independent of any active ingredient.'
Much of the excitement around longevity supplements stems from promising results in animal studies. Compounds like NMN have extended the lifespan of mice in laboratory settings. However, translating those findings to humans is a significant leap, and robust, long-term clinical trials in human populations largely remain absent or inconclusive.
Regulatory oversight adds another layer of concern. Dietary supplements in the United States are not required to prove efficacy before reaching store shelves. Manufacturers are only obligated to demonstrate that their products are not actively harmful, leaving consumers to navigate a crowded market with little reliable guidance.
Experts recommend that individuals interested in longevity focus on interventions with a strong and consistent evidence base — regular physical activity, a diet rich in whole foods, quality sleep, stress management, and avoiding smoking. These lifestyle factors have repeatedly demonstrated meaningful effects on healthspan in large human studies.
That is not to say all supplements are useless. Vitamin D and omega-3 fatty acids, for example, have accumulated considerable research support for specific populations. The problem, scientists say, is the blanket marketing of unproven compounds as anti-aging breakthroughs, often at premium prices and backed primarily by anecdote.
Before adding any supplement to your routine, experts advise consulting a qualified healthcare provider and scrutinizing the quality of the evidence behind any product claim — rather than taking an influencer's word for it.