EVIDENCE GUIDE

Can Supplements Really “Boost” Your Immune System?

“Boost” is an imprecise marketing term. NIH notes that several nutrients are essential for proper immune function and that deficiencies can impair it. But for people without a deficiency, taking more micronutrients generally does not mean proportionally better protection from infection. Evidence depends on the nutrient, population, dose and outcome studied.

What to keep in perspective

Research about an ingredient or lifestyle factor does not automatically prove that a branded supplement containing it is effective. Dose, formulation, study population and the outcome measured all matter.

Practical takeaway

Start with adequate nutrition and general health habits. If you are considering supplements because of symptoms, a suspected deficiency, medication use or a medical condition, individualized professional advice can be more useful than generalized marketing.