22 citations,
September 2008 in “Brain & development” Biotin supplements increased biotin levels but did not significantly prevent hair loss in rats on valproic acid.
15 citations,
May 2006 in “Brain & development” Valproic acid may cause hair loss by reducing biotinidase enzyme activity in rats.
March 2023 in “Mağallaẗ wāsit li-l-ʿulūm wa-al-ṭibb” A rare biotin deficiency in an Iraqi family caused severe symptoms but was successfully treated with lifelong biotin.
16 citations,
May 2009 in “Journal of child neurology” Valproic acid does not change biotinidase enzyme activity in children's blood.
21 citations,
June 2011 in “Journal of child neurology” Valproic acid and carbamazepine do not change biotin or biotinidase levels but may lower zinc levels, still within normal range.