Short answer: Vitamin C is a powerful antioxidant that supports collagen formation and skin health, while Biotin is the beauty essential that supports healthy hair growth and stronger nails.
Why these two ingredients address genuinely different parts of beauty
Vitamin C's role centers on collagen and skin firmness, while Biotin's role centers specifically on hair growth and nail strength — two complementary, not overlapping, contributions.
Why this pairing is supported by cited, checkable research
Vitamin C's role in skin health is documented in Nutrients (Pullar et al., 2017), and Biotin's role in hair support is reviewed in Skin Appendage Disorders (Patel et al., 2017).
💡 Worth knowing: these citations concern the individual ingredients, not the finished DermaCept product.