Rainbow Research Organic Herbal Henna Biotin Shampoo. Description: Rainbow Research Henna/Biotin. Organic Herbal Shampoo. for Natural or Color Treated Hair. Rainbow Henna/Biotin Shampoo is perfect for Natural or Color Treated Hair. Enhances shine and conditions without affecting color. Organic Herbal Extracts combined with colorless Neutral Henna extract provides all the natural benefits of Henna without the color. Adding body and smoothing the hair shaft. Biotin helps strengthen the hair shaft and supports new hair growth. Hair feels and looks healthier. Rainbow Organic Herbal Extracts are a combination of Marigold, Chamomile, Lemon Grass, Soy and Aloe Vera. Plus Vitamin E. Oil Free/No Artificial Colors/pH Balanced. Disclaimer: These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.