Supports keratin infrastructure — the primary structural protein of skin.
Cofactor for carboxylase enzymes that power cellular energy metabolism.
Supports healthy cell turnover and tissue maintenance over time.
Biotin (Vitamin B7, formerly Vitamin H) is a water-soluble B vitamin essential for cellular metabolism and protein synthesis. It serves as a critical cofactor for carboxylase enzymes — the machinery your body uses to metabolize fatty acids, amino acids, and glucose. In the skin, biotin’s primary role is supporting keratin production — the structural protein that forms the foundation of skin, hair, and nails.
Biotin activates carboxylase enzymes that are essential for fatty acid synthesis — the process that builds the lipids your skin barrier depends on. Without adequate biotin, fatty acid production slows, lipid composition changes, and the barrier weakens. Topically, biotin supports the metabolic energy supply that skin cells need for healthy division, differentiation, and keratin assembly. It works at the foundation level: not treating symptoms, but ensuring the cellular machinery that maintains skin structure has the fuel it needs.
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carboxylase enzymes depend on biotin as their essential cofactor — without it, fatty acid synthesis, amino acid metabolism, and glucose processing all slow down.
Biotin skincare works at the deepest level — not treating surface symptoms, but powering the cellular engine that maintains skin structure. As vitamin B7 for skin, biotin is the essential cofactor your cells need for biotin keratin production — the protein that forms skin’s structural foundation. The biotin skin benefits go beyond the surface: biotin cell metabolism ensures every skin cell has the energy for healthy division and lipid synthesis. As a biotin skin repair agent, it supports the fatty acid production that ceramides depend on — making it the invisible partner behind every barrier-building ingredient. This vitamin H skincare role is foundational: biotin barrier strength comes from ensuring cells can actually build what they need. Combined with Niacinamide for internal ceramide synthesis, Panthenol for accelerated cell renewal, and Sunflower Extract for linoleic acid delivery. Supported by Hyaluronic Acid for deep hydration and Vitamin E for lipid protection — all on a Ceramide 3 foundation. Explore the full formulation in The Serum C+E on Amazon.
Ceramide 3 reinforces the barrier structure. Biotin fuels the cellular machinery that builds and maintains that structure in the first place. Without adequate biotin, skin cells can’t produce the fatty acids and keratin proteins they need — no matter how many ceramides you apply externally. Biotin ensures the factory runs. Ceramide 3 ensures the product holds.