I think the Keto diet may be very helpful in reducing/eliminating cravings for the addictive substance. This is just my speculation. I began to suspect that sugar was an addictive substance after years of trying to lose weight by restricting calories. The cravings I had were intense. Keto stopped my cravings, which solidified my belief that sugar is addictive. Alcohol is converted to glucose (sugar) in the liver. Could sugar addiction be a part of alcohol addiction? If it is, Keto should be helpful. I don't know about other addictive substances, but I think it is worth a try. My brain fog is gone, my depression is lifted, and I have more energy and motivation to get daily tasks accomplished. Keto may help people in recovery with those symptoms. Again, it's just speculation on my part, but I think it's worth trying.