Don't know how safe this is but I mix a solution of baking soda and water (5 teaspoons of baking soda, 1 liter of water) and drink it all quickly after using the treadmill for an hour. Then in about 30 to 50 minutes I get really thirsty and begin drinking plain filtered water. After an hour or two the water mixture goes right through me. Then I drink lots of plain filtered water and eventually eat some light fruit or celery until my digestion is back to normal. Afterward I feel very light and relaxed and never get sore or tired muscles from exercising. I even feel great the next day. Sometimes I get nauseous or light headed right after drinking it if I do it wrong. I make sure not to eat anything or drink anything for a few hours before or the water mix gets absorbed instead of going through. It completely removes all desire for anything besides fresh raw fruits and vegetables and water. I don't feel hungry. My digestion is much less sluggish afterward if I stick to the raw fruit and vegetables. My thinking is very clear and relaxed. I'm not sure how safe it is because that's a lot of salt at once, and a lot of bicarbonate. I got the idea from that diet where you fast and drink lemonade with cayenne pepper.