Unpacking the Peptide Craze: Why Are They Suddenly Everywhere?

The Trend: Peptides are having a moment. These chains of amino acids have long been used in medicine. For example, semaglutide (Ozempic) is a peptide, but a growing number of influencers are now promoting off-label peptide injections for everything from fat loss and muscle growth to better sleep, faster injury recovery, and anti-aging. Interest in hormone optimization and biohacking has surged, and telehealth clinics have made it easier to obtain experimental compounds. 

What People Are Saying: One GQ article described unregulated peptides as “the hottest thing on the fringe of fitness and anti-aging.” Sounds cool, but most traditional healthcare practitioners recommend steering clear or, at the very least, exercising extreme caution. “Without a clinical deficiency, the benefits don’t justify the risks for most people,” one doctor said. Another calls the current state of compounded peptides “kind of a Wild West.” 

What to Know: Many of the purported benefits are based on small studies, animal research, or anecdotal reports. While some peptides do have legitimate medical uses, many of the compounds circulating online have not been rigorously tested in humans — and definitely not for the uses they’re being marketed for. Safety concerns include contamination, incorrect dosing, unknown long-term effects, and misleading marketing claims.