Hair ResQ Thickening Treatment.
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. Vegan | Color-Safe | pH Balanced | Gluten-Free Hair ResQ Thickening Treatment for thinning hair is a natural conditioner that is formulated with Biotin to strengthen and revitalize hair plus Caffeine to energize and invigorate hair follicles and encourage healthy hair growth. Original Formula. Biotin B-Complex + Caffeine.