Terrai's One & Done Serum is built on a single premise: your skin shouldn't need five different bottles to fix five different problems. It's why this face serum stacks brightening, hydrating, and barrier-repairing actives into one 30ml bottle instead of forcing you to layer multiple products.
- Multi-active formulation backed by real actives, not filler. The serum combines niacinamide, tranexamic acid, ethyl ascorbic acid (a stable vitamin C derivative), and fermented ingredients like lactobacillus and fermented honey, actives that dermatology research consistently links to reducing dark spots and uneven tone.
- Peptide-driven, not just marketed as "anti-aging." It contains five distinct peptides, including Acetyl Hexapeptide-8 and Copper Tripeptide-1, to support long-term collagen and elastin production rather than relying on a single generic peptide blend.
- Clinically documented, with the paperwork to prove it. An IN-VIVO clinical test report, a hypoallergenic test, and a skin irritation study are all published as downloadable PDFs on the skin care collection, so claims aren't just copy on a page.
- One formula addressing multiple concerns. Instead of separate products for hydration, texture, and pigmentation, the serum is formulated to address dark spots, redness, under-eye puffiness, and barrier weakness in a single AM/PM step.
- Homegrown and made in-house. Terrai formulates its own products rather than white-labelling, giving it direct control over ingredient sourcing and batch consistency.
A face serum that does the job of your whole shelf still has to earn that claim with data. Browse the skin care collection and see what's actually inside the bottle.
