Is High Dose Thiamine (HDT) a mechanism of repairing a Leaky Brain? And, a reason HDT works.
…Several B vitamins sup.port the health of the blood-brain barrier:
Vitamin B1 (thiamine) deficiency disrupts the blood-brain barrier and supplementation can restore it.
Vitamins B12, B5, and B9 (folate) can restore blood-brain barrier integrity.