This diet is absolutely horrible for your health. Don’t do it.
Nutrients get lost when you purée something into a liquid, or in her case, power it and sell it powdered. Just eat fruits and vegetables whole as it retains all their nutritional value, chew very well, drink a lot of water, do not eat fattening foods too often, and just eat healthily. No need for it to be a juice that will leave you nutrient deficient. Also, this is blatantly a starvation diet. No kidding you’ll lose weight you’re not giving your body enough nutrients, or calories. Imagine only eating 300 cals a day. That’s this diet.