Cold & Flu Prevention

Supplements studied for preventing or shortening common cold and flu.

19 supplements have studies linked to this goal. Zinc scores highest (6/10), followed by Elderberry (5/10) and Garlic Extract (5/10). 6 of them reach moderate or strong support — the rest are thinly studied or showed little effect.

Supplements rated for Cold & Flu Prevention

How to read these scores

The 0–10 score reflects how well the evidence supports a supplement for this specific goal, independent of how much it has been studied overall. It is an editorial rating checked against meta-analyses — how we set it.