Even though I know food is a profitable business, I have not been involved with any food business. If you are interested, you can do a lot of things in this industry, you can become a producer (farmer), you can become manufacturer of processed food, you can become a seller of produce, you can become a refinery, you can even start a restaurant. However, it can be very complicated to start a food based business as you need permits from various departments, including trade and commerce, quality control, and health departments, etc. Getting permits from government agencies can be a real problem.