Immunity-boosting duos top doctors swear by

Now that ‘sick season’ is in full swing, we want to do all we can to defend against infections like colds, flu and COVID.

- Melissa Gotthardt

And while studies on immunity-boosting supplements abound, determining the best options can prove overwhelming and confusing. That’s why we asked top health experts to share their personal favorites. Here’s how they optimize their own immunity with powerful pairings to outsmart respiratory infections—and how you can too!

START WITH ‘SLOW C’… Steven Gundry, MD, has been supplementing with vitamin C for more than 25 years. A study in Nutrients found it lowers cold incidence by 36%. And in people who did get sick, the duration of symptoms dropped by 59%. What’s more, a JAMA study found that taking 2,000 mg. of vitamin C daily lowered pneumonia risk by 86%. The vitamin amps up immune cell production and curbs