Sons Hair Growth Complex - Multivitamin & Anagain - 60 capsules Marine Collagen acts as an antioxidant to strengthen scalp and hair follicles. Acerola cherry extract is an excellent source of vitamin C, which hair needs to help with collagen synthesis. Also acts as an antioxidant and aids in the absorption of iron, a key nutrient for hair. Saw Palmetto inhibits DHT, preventing hair follicle shrinkage and hair cycle shortening to improved hair health. Studies show it has anti-androgenetic properties.