High-dose biotin is real medicine for one inherited condition
An inherited fault in the enzyme that recycles biotin leads to seizures and lost sight or hearing untreated. Consistent high doses halt much of it, and US newborns are screened.
What the study found
The one condition where high dose biotin is genuinely treatment
Biotin is normally recycled by an enzyme, biotinidase. When it is missing, an inherited condition, biotin runs out on a normal diet, and untreated it reaches seizures and lost sight or hearing. Consistent high doses halt much of it, which is why newborns in all 50 US states are screened.
The caveat · Says nothing for people without it
This is a reference chapter, and it reports no incidence figure. The high doses used here treat a specific inherited fault in recycling biotin, and say nothing about biotin in people who do not have it. Reading across from this condition to general supplementation is precisely the error its existence invites. This reflects the chapter as it stood in December 2025.