Mind-body CAN be the causative factor. But sometimes correlation only. A friend's wife died, and he got sick afterwards. Grief? Illness went away when he stopp

Mind-body CAN be the causative factor. But sometimes correlation only. A friend's wife died, and he got sick afterwards. Grief? Illness went away when he stopped eating badly (his wife had prepared most meals for him). Of course, he had switched to a pretty bad diet, and he was older, more likely to be affected by diet. Cramps, for example, can be often be prevented with potassium, which is in plants. Some people don't eat plants as much when they are stressed, leading to cramps.