vitamin b1
4 interactions related to vitamin b1
vitamin b1 + magnesium
Magnesium is the required cofactor that converts thiamine (vitamin B1) into its active coenzyme form, thiamine pyrophosphate (TPP). Without adequate magnesium, thiamine cannot activate properly, so supplementing thiamine in a magnesium-deficient person produces little benefit until magnesium is restored.
black tea + thiamine
Black tea contains antithiamine factors - polyphenols such as tannins and chlorogenic acid - that oxidise thiamine (vitamin B1) into thiochrome-negative, biologically inactive forms in the gut. High habitual tea consumption has been linked to reduced thiamine status, especially in populations with marginal B1 intake.
coffee + vitamin b1
Some early studies suggested coffee contains compounds with antithiamine activity, but follow-up work showed chlorogenic and caffeic acids are not active antithiamine agents under physiological conditions. Heavy coffee or tea intake on a marginal thiamine diet can still modestly worsen thiamine status.
alcohol + thiamine
Alcohol blocks thiamine (vitamin B1) at every level — reducing intestinal absorption, impairing hepatic phosphorylation to its active form, and accelerating urinary loss. Thiamine deficiency in drinkers causes Wernicke encephalopathy (acute) and Korsakoff syndrome (chronic, often irreversible).