Intermediate fasting, water fasting and crescendo fasting are all methods of fasting to lose weight. While intermittent fasting 16:8 works to help you lose weight fast, did you know you don't have to do intermittent fasting for 16 hours? Intermediate fasting 12 hours works just as well! I lost 10 pounds in 3 weeks just by fasting! It's the BEST way to get skinny fast for lazy girls like me!