not enough calories
I've been on the hcg diet for 17 days and have lost 21 lbs without difficulty.
The only problem is that I seldom eat over 350 cal in a day,if I stick to the 100gr protocol. There just aren't that many calories in leafy vegetables! Chicken and fish and they are pretty low cal too. I am using the homeopathic hcg alternative drops (FDA has banned the real stuff) 6 x a day and don't feel hungry at all. I like to puree strawberries with lemon juice and cider vinegar for a salad dressing....it's very yummy. I use a lot of fresh ginger and garlic too.