According to this link, whole grains, legumes (peas and beans), apricots, pineapples, melons, cow's milk, lentils and many leafy greens all contain Vitamin B1 but I'm not sure whether they have the same amount as a Vitamin B1 tablet (which obviously depends on how big a tablet it is !). A deficiency may not be caused by a lack of these food stuffs but by excessive alcohol consumption.