What it is: A lightweight, sensitive-skin friendly 7% stabilized Vitamin C serum that visibly brightens uneven skin tone. Skin Type: Normal, Dry, and Sensitive Skincare Concerns: Dark Spots, Dullness, and Uneven Skin Tone Formulation: Serum Highlighted Ingredients: - 7% Stabilized Vitamin C (Tetrahexyldecyl Ascorbate) 20%: A potent, gentle vitamin C for visible brightening and dark spot reduction. - Vitamin E: An antioxidant, vitamin E works to deeply nourish and soften the complexion. Ingredient Callouts: Contains less than one percent synthetic fragrance. What Else You Need to Know: C-Tetra is the perfect option for those new to Vitamin C or with sensitive skin—this serum restores the look of skin radiance in just 7 days while remaining gentle. Formulated with jojoba seed oil, C-Tetra delivers effective yet non-greasy nourishment for visibly softer and comforted skin. Clinical Results: Proven via independent consumer study conducted over 4 weeks on 52 participants with sensitive skin: - 7 days to visibly brighter, smoother skin and improved skin radiance - 96% of sensitive skins agreed C-Tetra was gentle on the skin - 90% agree skin feels instantly softer