Vitamin B1 (Thiamine)

Overview
Vitamin B1, also known as thiamine, is a water-soluble vitamin that is essential for mitochondrial glucose metabolism in the brain. It serves as a cofactor for pyruvate dehydrogenase (PDH) and alpha-ketoglutarate dehydrogenase (α-KGDH), enzymes that are critical for converting glucose into ATP through the TCA cycle. Thiamine does not exist in large brain reserves; the central nervous system maintains small, tightly regulated intracellular pools that depend on continuous, transporter-mediated supply, making deficiency states potentially acute. Thiamine deficiency can rapidly impair brain energy metabolism and cognitive function.
Recipes
Foods
Biological Mechanisms and Implications
References
- Thiamine is essential for mitochondrial glucose metabolism in the brain leading to ATP production Dhir et al. 2019
- Thiamine does not exist in a large brain "reservoir"; the CNS maintains small, tightly regulated intracellular pools that depend on continuous, transporter-mediated supply, making deficiency states potentially acute
- Therapeutic doses up to 100× higher than RDA have shown benefit in Alzheimer's disease, with larger Phase 2 trials in progress








