Health-food buy is a job title that refers to someone who specializes in selling health food products. The two crossword solutions for this term are soy milk (7 letters) and tofu (4 letters). Soy milk is a plant-based milk made from soybeans, while tofu is a food made from condensed soy milk that is pressed into solid white blocks. Both of these products are popular health food items and are often sold by health-food buyers.