Fourth Youth

Fourth Youth is the longevity skincare brand bringing cellular science out of the biohacking world and into your daily routine. Founded in 2026 by Niki Hoang, a devoted biohacker and former tech program manager, Fourth Youth was built on a simple observation: the longevity movement was transforming how we age from the inside, while skincare stayed at the surface. The molecules biohackers rely on internally, like NAD+ and peptides, were almost nowhere to be found on skincare shelves.

Fourth Youth closes that gap with a deliberately minimal launch line of three precision formulas. Glow Mode, a Bio-Active Radiance Serum for morning, pairs NAD+ with vitamin C and a multi-peptide complex to brighten, hydrate, and rejuvenate. Moon Mode, a Bio-Renewal Peptide Treatment for night, combines bakuchiol, a plant-based retinol alternative, with copper peptides to smooth, refine, and renew without irritation. Lip Lush, a Bio-Smooth Night Lip Balm, extends that overnight renewal to the most overlooked skin on your face, hydrating and smoothing lips while you sleep. Every formula is built on the same philosophy: fewer, smarter steps backed by 12-week consumer perception studies, instead of 10-step routines that overpromise and underdeliver.

Headquartered in Philadelphia, Fourth Youth is female-founded and independently owned, with formulas that are science-driven, cruelty-free, and designed around a single belief: if aging begins at the cellular level, skincare should start there too. Additional launches, including a cleanser, moisturizer, and daytime lip balm, are on the way.