The main difficulty when it comes to Keto is going into Ketosis. Our body takes a lot of time because it turns towards survival mechanisms first before eventually going into ketosis. Moreover, it’s also hard because many people don’t get the diet right. A lot of people feel they’re eating fewer carbs than they actually are and some aren’t able to adapt to the totally carb-free lifestyle. See more at: http://steroidscience.mystrikingly.com/blog/is-ultra-fast-keto-boost-a-scam