I'm 4 weeks in to the BSD, and have lost 7kg (about 16lb), and that's as someone who was ALREADY low carb, high fat (paleo/primal/Lchf, whatever label you prefer), and that brings my total weight loss to 38kg/6stones (over several years).
I follow a grain free, whole food diet (heavy on green leafy stuff, non starchy veg and seafood, with plenty of good quality meat and natural fats, very little dairy other than butter and cream). So I've just cut it back to 800 cal a day, with an 6 or 8 hour eating window most days. I think the short eating window is quite helpful, for both me and my DH.
Family history of type 2 diabetes, IBS,coeliac, inflammatory bowel disease, RA, other autoimmune conditions... I had some of these myself (now resolved/in remission on the "clean" diet), and had gestational diabetes, a big risk factor for developing type 2. Have been self testing with a blood sugar meter every few months for the past 8 years and watching my BS carefully. I'm certain I would have fully diabetic some years ago if I hadn't lost weight and started watching my carb intake. However, I still have weight to lose, and too much of that is on my belly, and my BS is too near the high end of normal for my liking.
The 800 cal for 8 weeks is an excellent and much needed kick up the arse! At the start of the 8 weeks, I bought a step tracker and I am finding that very motivating- walking an hour every day since (pats self on back
). Can't quite face anything more vigorous while on the 800cal a day!