Vitamins stored in bathrooms, kitchens may become less effective

High humidity present in bathrooms and kitchens could be degrading the vitamins and health supplements stored in those rooms, even if the lids are on tight, a new study shows. Crystalline substances are prone to a process called deliquescence, in which humidity causes a water-soluble solid to dissolve. Keeping vitamins and supplements away from warm, humid environments can help ensure their effectiveness.