India, Dec. 7 -- The arrival of a new, advanced generation of peptides has made them this year's must-have in the beauty world. Boosted by celebrity endorsements like Dua Lipa's DUA brand and Hailey Bieber's Rhode lip treatment, they promise to dramatically lift, tighten, and repair the skin. This popularity has led to an even more high-tech trend called peptide stacking, which is the newest and most scientific way people are using them. Peptides are short chains of amino acids, tiny messengers that tell your skin or body what to do. They can signal collagen to rebuild, inflammation to ease, muscle recovery to accelerate or hormones to regulate. For years, dermatologists have used them for targeted repair. Peptides had already been popular, but stacking pushed them into a new kind of virality. Wellness creators like Yuri Lee began filming their morning routines featuring rows of droppers, pastel serums and peptide vials. "Social media made stacking very visible because people started showing faster improvements," explains dermatologist Dr Prachi. On the wellness side, stacking fits into the current culture of longevity, where every creator is documenting their personal recipe for metabolic health, gut repair and recovery. Peptides have a surprisingly powerful effect on the body's hormonal and cellular signalling. When you combine several peptides, those signals can overlap, amplify or interfere with one another. Dermatologist Dr Deepali Bhardwaj explains that not all combinations play well together. For instance, when it comes to injectables, mixing different peptides without strict medical protocols can be risky. Some people experience mood fluctuations, dizziness or disrupted sleep. Others notice shifts in insulin response, blood sugar imbalances or added strain on the liver and kidneys. The skin itself can react too - redness, irritation or sudden breakouts are common....