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Sleep, vaccination timing, handwashing technique, stress management — the specific habits research actually supports, and the ones "immune-boosting" marketing exaggerates
Christopher Campbell / Unsplash
"Immune-boosting" has become one of the more overused and least precise phrases in health marketing, applied to everything from juice cleanses to specific vitamin megadoses with considerably more confidence than the underlying research actually supports. The immune system doesn't have a single dial that a supplement or food can simply turn up, and most of what genuinely affects how well it functions comes down to a smaller set of well-documented habits that receive less marketing attention specifically because they aren't easily sold in a bottle.
Each entry in this list covers a specific habit with genuine research support, the mechanism behind why it matters, and the practical timing that makes starting it before cold and flu season peaks more useful than starting it once symptoms have already begun.
