Ah yes, I've run across that guy before. He's a nutcase, pure and simple, and is only out to sell his ebook.
When my body fat % was the lowest - 12.5%, which is low for a woman - my skin problems were at their worst. The less fat filling up the skin = the more excess skin, which is the opposite of what he says.
My advice? Save your money!
Gillian, congratulations on your weight loss! Come and join us in the Maintainers Forum.