I found LCHF through many decades of frustration in losing weight (Weight Watchers Lifetime member, Low Fat diet, etc etc). After years of severe symptoms of IBS and trying a Low Fodmap diet with some success, I decided to try Intermittent Fasting in 2016. I lost 40 lbs over the course of a year and felt great. However, I developed a sinus infection that wouldn’t resolve with many rounds of antibiotics and was diagnosed with a Primary Immunodeficiency (from birth) which also affects the gut as well as the lungs and sinuses (frequent infections). The treatment is regular Gamma Globulin infusions, however this caused a gain of 20 lbs as my body became more healthy. Finding Low Carb (LCHF) in addition to the IF was a game changer. Now I am slowly losing again (slowly because the infusions cause fluid retention due to having to be over hydrated to absorb the thick medication). I am an advocate for eating whole food, no sugar, no sweeteners (have been off of both for 1.5 years), low carb low Fodmap veggies, some fruits, whole fat yogurt (no added Inulin due to IBS), and no gluten. This way of life is the best for my body. We all respond differently. Before changing my diet to LCHF I participated in a Microbiome project at the University of California, San Diego (UCSD). I recently took samples and submitted them again to UCSD as part of a study to look at the Microbiome of people with Immune Deficiencies. This time I was eating LCHF so the pre/post results may be very interesting. I think we are going to find in the future that our Microbiomes are what determines which foods are bodies need to thrive. Google the American Gut Project (not able to post the link) for more info.