In fact, he says my already somewhat balanced diet is part of why I didn't experience the keto flu. (Some people report feeling sick to their stomach, irritable, and dizzy, among other flu-like symptoms, for the first few days or even weeks of keto.) People who transition from a very high-carb and high-protein diet to a high-fat diet are more susceptible to these rare but extreme symptoms, he says. This is why he says he built a Feast Phase-when you're adding fats into your diet without really restricting your carbs-into his Keto360 plan as a way to ease your body into ketosis. "If someone is a fairly good eater, and they already do have a moderate amount of fat in their diet-not high fat but moderate-typically they'll transition pretty well," he says.
There has also been increased interest in the diet’s effects on aging and cognitive function. [9-11] Cell damage through stress and inflammation that can lead to age-related diseases has been linked to a specific part of DNA called telomeres. These structures naturally shorten with age, and their length size can predict life expectancy and the risk of developing age-related diseases. Telomeres with long lengths are considered protective against chronic diseases and earlier death, whereas short lengths increase risk. Antioxidants can help combat cell stress and preserve telomere length, such as by eating foods that contain antioxidants nutrients like fruits, vegetables, nuts, and whole grains. These foods are found in healthy eating patterns like the Mediterranean diet.  This was demonstrated in a large cohort of 4676 healthy middle-aged women from the Nurses’ Health Study where participants who more closely followed the Mediterranean diet were found to have longer telomere length. 
Now that Flynn’s diet has demonstrated acceptance and encouraging results among several different populations, she feels that its potential is even greater than she had first fathomed. The financial accessibility of a plant-based olive oil diet is one of its most significant features, since it is often assumed that such an eating pattern will inherently be pricier than a more traditional standard American diet. Flynn remarks, “When someone says that olive oil is expensive, I point out that they are comparing olive oil pricing to vegetable oil, which I do not think is a fair comparison.” She goes on to note that since animal products often comprise the lion’s share of one’s food budget, purchasing less meat while adding more olive oil typically results in a decrease in overall food costs. This point is especially important for Flynn’s current work with food pantry clients and her future plans to bring the diet to low-income populations to improve their risk factors for chronic diseases.
Cold pressed extra virgin olive oil has many benefits when used properly. You may not want to cook with it at high temperatures, though. While it appears to be more stable than other vegetable oils, all oils break down and lose their nutrients and flavor when cooked on high heat. Plus, the oxidation that happens during cooking may actually create compounds that attack healthy tissues in the body. For cooking at extremely high temperatures, it may be advisable to use a more stable fat that’s a shorter chain fatty acid, like coconut oil or avocado oil.
It's important to realize that MCT oil will not produce weight loss miracles all on its own. However, it is an excellent addition to an otherwise healthy diet. Moreover, many consider MCTs "the ultimate ketogenic fat," as it allows you to eat slightly more net carbs while still staying in nutritional ketosis. Without MCTs, you'd have to cut carbs more drastically in order to maintain ketosis.
Now, if you had looked only at the blood lipids of the monkeys eating the monounsaturated-fat-rich diet in this study, you’d have thought they would have ended up with cleaner arteries than those that ate more saturated fat. Compared to monkeys fed the diet high in saturated fat, the monkeys fed the monounsaturated-fat-rich diet had lower LDL bad cholesterol levels and higher HDL good cholesterol levels (similar to what happens in studies with humans). And compared to monkeys fed a diet high in polyunsaturated fats, the monkeys fed the high-mono diet had HDLs that were nearly twice as high (again, just like humans).
Don’t get it wrong — just about all the cheap and abundant oils in coconut oil are good for you, which is why coconut oil is high on the list of Bulletproof foods! The problem is that studies show you can’t get enough of the really useful MCTs from just eating coconut oil or a so-called “MCT oil” that is diluted with lauric acid, a useful, but cheap, and hugely abundant part of coconut oil that is marketed as an MCT oil.
HDL cholesterol has long been considered “good” because it is largely responsible for picking up excess cholesterol from tissues, including the artery wall, and bringing it back to the liver for disposal. This process is known as reverse cholesterol transport. It’s easy to remember if you think of HDL as the garbage trucks that help rid the body of garbage (LDL).
In fact, the FDA now allows olive oil labels to carry the claim that its monounsaturated fat can reduce heart disease risks -- with a few strings attached. The claim says that "limited and not conclusive scientific evidence" suggests that eating about 2 tablespoons of olive oil daily may reduce the risk of heart disease. To give this possible benefit, it adds, the olive oil must replace a similar amount of saturated fat in your diet -- and must not increase the total calories you eat in a day.