Salmon-DNA injections and other odd beauty trends, demystified

Social-media beauty trends range from salmon sperm DNA injections to nightingale-droppings facial masks and PRP ‘vampire facials.’ Science suggests purified fish DNA fragments and growth-factor–rich plasma may modestly improve hydration, texture and wrinkles, but evidence is limited and often industry-funded. Experts caution against DIY uses of bird droppings and emphasize that real benefits come from proven routines (sunscreen, moisturisers, retinol) while researchers explore collagen optimization and microbiome–based therapies.