Fasting for Vaccine Efficacy: Should You Eat Before Your Shot? (And What Really Matters)
You’ve got your vaccine appointment booked. Maybe it’s your annual flu shot, a COVID booster, or another important immunization. Naturally, you want it to work as well as possible. Then you hear a snippet of conversation, read an online post, or recall an old wives' tale suggesting fasting *before* the shot might "boost" your immune response. Should you skip breakfast? Let’s cut through the noise and find out what science says about eating before your jab, focusing on what truly supports your immune system. **The Fasting Question: What Does the Science Say?** The idea behind fasting potentially helping isn't pulled from thin air. Some animal studies, particularly one from Yale University in 2020 published in *Immunity*, showed fascinating results. Mice who were given a compound mimicking a fasting state *before* receiving a vaccine actually generated a *stronger* immune response compared to mice that ate normally. The proposed reason? Fasting seemed to reduce backgrou...