Synonyms: late-onset multiple carboxylase deficiency
Biotinidase (BTD) is an enzyme found particularly in kidney, liver and serum, involved in recycling biotin. This is an essential water-soluble vitamin co-factor, sometimes called vitamin H, used by the four human carboxylase enzymes in the metabolism of fats, carbohydrates and proteins.
This is a companion discussion topic for the original article at https://patient.info/doctor/neurology/biotinidase-deficiency