People who have been abusing [drugs and alcohol] tend to lack of nutrition. The type of malnutrition can depend upon the substance being abused. Opiate addicts, for example, often show deficiencies in calcium, vitamins D and B6, and iron, while cocaine addicts generally have low levels of omega-3 fatty acids.On the other hand, alcohol causes the body to excrete larger quantities of nutrients. While putting addicts on vitamin and mineral supplements can be helpful, “real food, with some supplements.Read the blog here - http://www.addictionrehabcenters.com/addiction-treatment/alcoholics-anonymous/