Biotin deficiency can cause dry skin, brittle nails and hair, as well as hair loss
Published by: The Nutritional Medicine Institute Open Access: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence ( which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited
Nitrosative stress is also present, as illustrated by markers of nitrosative stress such as increased NOS and NO (182, 297), peroxynitrite (182, 297), elevated NF- production (182), and nitrate after exercise (182, 297)
The participants applied 2% oxidized glutathione (GSSG) lotion to one side of their face and a placebo lotion to the other side, twice daily for 10-weeks