Diet.
Before I used to eat very rarely. Once a day, probably chips and juice. Drank zero water.
Since adopting a carnivore diet, Ive been happy. A typical day starts with Liver or any organ and 3-5 Eggs/Milk for drink. Lunch is light, probably any kind of Fish I can get my hands on with Organs. Then end the day with Steak (Sirloin typically) and Blood. Nourishment is the key.