D - the person who started this thread was an expert on the subject, and I know she upped her fat and kept her carbs around 50, she completed 6 challenges I believe. Anyhow, she doesn't belong to the forum any longer.

I just started BFL on the 10th and completed my first week on day 9 now. I'm keeping my carbs around 30 - 40, my fat at about 30% of calories. I'm cutting back on some of the fat, but not all. I am grilling chicken, but might have some real mayo etc with it.

Sorry I can't answer your question, but I think having some fat worked for some.

Are you doing the program? If so, is this your first Challenge?