Yes my meat fast only last one day. It just seems to zap my appetite down some. Because I am in maintainence the amount of carbs I eat from day to day vary. Im certain some days I would be close to 75 where as others i may only be getting 15. generally im about 30-45. I dont have it written in stone either. I may go 7 days maybe 2 weeks but I would say 3 times a month I have one day where I eat strickly meat and drink lots of water. I almost always eat 4 days a day...partly because I have hypoglycemia and partly cause my day starts sometime around 6 in the morning and doesnt end until 10 at night.