 In this study, researchers examined how quickly the body loses its stores of B-group vitamins after being deprived of them for five days. They found that the body rapidly loses its stores of vitamins B1, B2, for pyridoxic acid, a catabolite of vitamin B6, pantothenic acid, folate and biotin. These vitamins are excreted from the body through urination, and their levels in urine and blood drop sharply within two days. This suggests that the body may be able to detect when it has run out of vitamins and begin to excrete them before becoming deficient. This article was authored by Katsumisubota, Chisosugita, Mitsusono, and others.