Hair ResQ Thickening Treatment Follicle Stimulator Serum for thinning hair is uniquely formulated with CBP Tri-Complex, a proprietary blend of plant-based Peptides, Biotin, and Caffeine. Clinically tested peptides target DHT, which causes the onset of hair loss, while Biotin and Caffeine promote circulation to nourish hair follicles, amplify texture, and enrich the hair shaft, giving the appearance of thicker, fuller hair with continued use. We believe what's not in our products is just as important as what is, and that's why we are paraben-free, sulfate-free, vegan, and have banned over 1600 harmful ingredients. All of our plastic packaging is produced using 100% recycled Ocean Bound Plastic.