If there’s one ingredient stealing the spotlight this year, it’s peptides. Promising everything from firmer skin to thicker hair, they are now creeping into fitness and wellness routines, with claims that go beyond the surface. After maxing out on protein powders and collagen scoops , TikTok’s latest fixation is peptide stacking. Is it the next frontier in health, or just another wellness fad in disguise?

“Peptide stacking refers to the practice of using multiple peptides at the same time to achieve different or synergistic effects,” says Dr. Aarti Javeri-Mehta, internal medicine specialist & board-certified lifestyle medicine physician and founder of Sustain Health. “These peptides may target goals such as fat loss, muscle gain, improved sleep, wound healing, enhanced skin quality,

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