Our hair changes as we get older - it's just biology.  We've formulated products designed to work with our unique hair biology, for women who know that spirit and confidence don't stop as we get older, and neither should beautiful hair. Hair Biology Sulfate-Free Vivid & Protected Color Brilliance Conditioner provides brilliant care for color-treated greys. Our formula nourishes and protects against color fate, fights dullness and protects hair from damage to keep hair looking brilliant. No sulfated conditioners. Free of parabens and dyes and safe for color-treated grey hair. Infused with Biotin.  Discover the complete line of age-inspired hair care products from Hair Biology and fall in love with your hair again.