★ 55% OFF for Bookstores! NOW at $ 12.14 instead of $ 26.97! LAST DAYS! ★ If you're 50 plus, you may be thinking about starting a ketogenic diet. You may have heard that ketogenic diets can be used to lose weight and improve health, but what exactly is a keto diet? Why should you start it now? And are there any downsides to it? Before we talk about the positives of a keto diet, let's take a moment...