It follows similarly low-carb diets, like Atkins, a popular approach back in the early 2000s that has since fallen to the wayside. The researchers proposed that those at risk were probably eating fewer vegetables, fruits, and grains, which are known for being inflammation-fighting foods. He also suspects there are some benefits for the heart and reversing diabetes since it has been shown to improve insulin sensitivity. The main issue is that ketosis is arguably a backup mechanism for fuel and energy for the body, he says. There have been many positive effects reported, but researchers don’t understand the long-term effects of sustained keto-based nutrition.