Thyroxine Trimethoprim increases urinary excretion Valproic acid Vitamin K Impairs vitamin metabolism Iron Increases iron losses from the digestive tract Folate Reduces serum folate levels Folate Reduces folate absorption and impairs metabolism Vitamin B12 Increases urinary vitamin B12 excretion Folate Impairs folate metabolism Niacin High doses of niacin may reduce effectiveness of certain oral hypoglycemic drugs Vitamin C Impairs vitamin C metabolism and increases uri- nary excretion Magnesium, zinc, calcium, Reduces both mineral and tetracycline absorption iron Zinc Increases urinary excretion Vitamin K, biotin Reduces endogenous vitamin production by col- onic bacteria Riboflavin, vitamin C Increases urinary vitamin excretion Vitamin-B complex, vitamin C, Increases urinary vitamin and mineral excretion potassium, magnesium, zinc Calcium Decreases urinary calcium excretion Vitamin B6 Impairs vitamin metabolism Riboflavin Reduces riboflavin absorption Vitamin E Impairs vitamin metabolism Folate Impairs folate metabolism and reduces absorption Copper, zinc, selenium Reduces serum mineral levels References Roe DA

Activation of GPER ameliorates experimental pulmonary hypertension in male rats
Additional medical clearance may be required for clients with certain kidney, heart or other health conditions
So, they might have all of the nutrients or most of them on the label, but when you look at the amounts or the doses that they contain, theyre often woefully inadequate