There are no miracles. This is just science. Any diet can knock water weight off of you, and as long as you like fruit juice, there isn't anything nasty to take. You are just eating enough carbs to keep your energy up, since fruit juice is just sugar, like pop. However, you aren't getting much fat, or protein, so that would be a problem, as well as " fasting ", which is why it is just 2 days.
I could tell you to eat plain meat at 1500 calories a day, and you would lose weight in bunches, but it isn't something to try for. The absence of carbs has a diuretic effect, so you might lose 5-6 lbs in 2 days. That doesn't mean you should try that.
Also, any temporary diet, will just be reversed when you revert back to the way you were eating before, so why bother. Fluid fluctuations like this have a better chance of doing damage to the heart, than seeing lasting results.
If you like doing this, go ahead, but I think the negative response are only because of concern for your long term health.
The first sign of any diet being B.S., is they combine the words MIRACLE, and DIET.
Russell - current BMI 28.6
197 - bmi 30 - done
164 - bmi-25
| current weight: 183.4