Hi Thank you for posting your query in HCM. I had gone through your question I understand your concerns. Weight loss programmes consists intake of low calorie foods which are lack of healthy nutrients that are required for the normal body functions, this leads to low levels of glucose, sodium in the body, causing electrolyte imbalance and hormonal imbalance too, imbalances in the hormones like cortisol, leptin, adiponectin, ghrelin will lead to foid cravings. Low sodium and low glucose in the body cause severe fatigue . Have a healthy and balanced diet that includes complex carbohydrates, high proteins, healthy fats.get regular physical activity. Hope i have answered your question if you have further questions i will be happy to help.