(Insulin can cause your body to make other hormones that bring on outbreaks.) Still, more research is needed to determine exactly how much effect, if any, the diet actually has on acne. This is mainly based on a commonly reported experience from people who have tried a ketogenic diet . This is a commonly reported positive effect from people who start a ketogenic diet. Several meta-analyses of RCTs, an even higher level of evidence, likeMansoor 2016 have confirmed greater weight loss with low carb diets.