vitamin b1
4 interactions related to vitamin b1
vitamin b1 + magnesium
Magnesium is the cofactor that converts thiamine (vitamin B1) into its active coenzyme form, thiamine pyrophosphate (TPP). When magnesium is low, thiamine cannot activate fully, so a thiamine supplement may produce little benefit until magnesium status is restored. The two work together rather than against each other.
black tea + thiamine
Black tea contains antithiamine factors - polyphenols such as tannins and chlorogenic acid - that can oxidise thiamine (vitamin B1) into biologically inactive forms in the gut before it is absorbed. Heavy habitual tea consumption has been linked to lower thiamine status, mainly in people whose dietary B1 intake is already marginal. For most well-nourished adults the effect is modest.
coffee + vitamin b1
Coffee and tea were historically labeled antithiamine beverages, but later biochemistry walked the claim back: chlorogenic and caffeic acids do not destroy thiamine under physiological conditions, and the real activity comes from polyphenol oxidation products and tannins, which are lower in coffee than tea. The net effect on thiamine status is modest and unlikely to matter for well-nourished people; it becomes relevant only on a marginal diet or in groups already prone to deficiency.
alcohol + thiamine
Alcohol depletes thiamine (vitamin B1) at multiple levels — reducing its absorption from the gut, impairing the liver's ability to convert it to its active form, and increasing how much is lost in urine. In heavy drinkers this can lead to Wernicke encephalopathy, a neurologic emergency, which if untreated may progress to Korsakoff syndrome, a chronic and often irreversible memory disorder.