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Request Sample D-Biotin (Vitamin H) Spec-Chem Industry Inc D-Biotin (Vitamin H) can make hair elastic, prevent early hair loss and improve the natural resistance of skin. It also has certain effectiveness in anti-wrinkle applications. This product can enhance the overall organizational structure of the skin, incr...view more D-Biotin (Vitamin H) can make hair elastic, prevent early hair loss and improve the natural resistance of skin. It also has certain effectiveness in anti-wrinkle applications. This product can enhance the overall organizational structure of the skin, increase the flexibility of nails, improve the structure of brittle nails and make nails more fine and smooth by promoting the synthesis of lipids. view less