Most fundamentally, olive oil, like all oils and fats, are a concentrated source of calories. With over 4,000 calories per pound, olive oil is far more calorie dense than even pure refined sugar, which has 1,725 calories per pound. Because of its extremely high calorie density, adding olive oil to any food or meal will dramatically increase its calorie density.
In just about every study purporting to show that people or animals lowered their LDL bad cholesterol levels after starting to use olive oil, the subjects used olive oil in place of other dietary fats, often saturated fats like butter, coconut oil, or lard. Well, of course LDL cholesterol is going to be lower when olive oil replaces butter. The total amount of saturated fat and/or cholesterol in the diet takes a tumble when butter is removed.
Another study, published in the New England Journal of Medicine in 2008, assigned 322 moderately obese adults to one of three diets: calorie-restricted low-fat; calorie-restricted Mediterranean; and non-calorie-restricted low-carb. After two years, the Mediterranean group had lost an average of 9 7/10 pounds; the low-fat group, 6 4/10 pounds; and the low-carb group, 10 3/10 pounds. Although weight loss didn't differ greatly between the low-carb and Mediterranean groups, both lost appreciably more than the low-fat group did.
A perfect plate reflecting the Mediterranean diet is nutritionally balanced, diverse, and full of color, flavor, and texture. It’s crisp, leafy greens; deep purple grapes; ruby-red salmon; vibrant rainbow carrots; and nutty, crunchy farro. It’s Greek yogurt topped with figs, dates, and a drizzle of honey. Is your mouth watering? That’s exactly the point—the Mediterranean diet should never feel restrictive. Instead, it’s an enlightened way of eating defined by plant-based foods such as vegetables, fruits, healthy grains, legumes, nuts, and seeds.
Until recently it was thought these antioxidant polyphenols acted directly on genes and blood vessels. But it turns out that they also work via our gut microbes that make up our microbiome. This is the community of trillions of diverse bacteria which live in our large intestine. They feed off the different polyphenols and produce other small chemicals (short chain fatty acids) that dampen down inflammation and help our immune system.
So is the Mediterranean diet still healthy? Absolutely. While this one study may have been flawed, it doesn’t change the fact that fresh fruits, veggies, lean proteins, whole grains, fish and healthy fats like olive oil (along with the occasional glass of wine!) are all foods that are proven to be good for you on their own. Together, they comprise a diet that can be terrific for your health — study or no study.
We require these two ingredients (Fat + carbohydrates) to be eaten around the same time in order for our bodies to store/produce fat. If we are unable to store or produce any new fat, then any time that our body isnt given enough energy (such as through the sugars and starches we eat), it will be forced to break down old fat in order to meet our energy needs. In the world of dieting, we call this weight loss. Ketosis is the exploitation of this chemical nature of our body. One may either eat mostly carbohydrates with little to no fat, in order to achieve ketosis (you must eat protien though or your body will burn your muscles away in search of protien–luckily many grains are a good source of potien), or you can focus on eating fat and cut out most carbohydrates (leaving up to 20 to 50 carbs left in a daily intake)(again, ensuring that you do take in protien evrryday or else your body will burn your muscle as well as fat to meet its needs).
• Other research suggests MCTs help with weight loss by reducing your appetite. As reported by Mental Health Daily:12 "Some scientists speculate that MCT acts on various hormones such as: cholecystokinin, gastric inhibitory peptide, pancreatic polypeptide, peptide YY and neurotensin. The precise mechanism of action of MCTs remains unknown, but it is known to induce satiety and reduced appetite compared to [LCTs]."
Reduced hunger. Many people experience a marked reduction in hunger on a keto diet. This may be caused by an increased ability of the body to be fueled by its fat stores. Many people feel great when they eat just once or twice a day, and may automatically end up doing a form of intermittent fasting. This saves time and money, while also speeding up weight loss.
Obesity means that someone has an excess amount of fat to the extent that it harms your health. Oftentimes, doctors, nurses, and other professionals will put your weight in terms of your height and gender in a figure called body mass index (BMI). According to the World Health Organization, a BMI from 25-30 usually indicates someone is overweight, BMI in the 30-35 range puts someone in the range of being obese and 35 and over morbidly obese. 
"Listening to podcasts while I run has completely changed my fitness routine. I thought I hated running, but what I hated was pop music. Keeping my mind engaged has helped me push passed physical barriers. Podcasts about keto, fitness, and nutrition is motivating to me to learn about my body while I’m actively working it. My favorite podcasts are Keto for Normies, The Keto Savage podcast, Seth Godin's podcast and Hiding in the Bathroom."
Weight loss in obese or overweight individuals. Research shows that taking MCTs can decrease body weight, body fat, and waist and hip circumference by a small amount. At least 4 weeks of use is likely needed to see any benefit. Men, people of Asian descent, and people with the highest amount of body fat before treatment seem to benefit the most. However, for most people any benefit is only slight and might not be clinically meaningful.
A 2016 study in The Lancet Diabetes & Endocrinology journal that analyzed data from Predimed – a five-year trial including 7,447 adults with Type 2 diabetes or at risk for cardiovascular disease who were assigned either a Mediterranean diet supplemented with olive oil, the same diet supplemented with nuts or a control diet – found that people on the Mediterranean versions added the fewest inches to their waistlines. The olive oil folks lost the most weight.
The bulk of research suggests that the ketogenic diet is more effective than conventional diets in helping you lose weight and shed body fat. One of the reasons why the ketogenic diet provides such reliable weight loss results is because it consists primarily of highly-satiating whole foods like meat, high-fat dairy, and low-carb vegetables while removing all carb-rich, sugar-laden processed foods from the diet. By eating in this way, you will feel full while eating fewer calories and losing weight.
As well as being a full time GP, Dr Simon Poole is a renowned international commentator on the Mediterranean Diet and a member of the Council of Directors of the True Health Initiative in the USA. He has written regularly on matters related to primary care in medicine and nutrition for a diverse range of national media including The Guardian, Nutrition and Food Science and the Journal of the Royal College of Surgeons as well as consumer magazines such as Cook Vegetarian and Body Language. He also has extensive experience broadcasting and writing for local, national and international radio, television and web based organisations and regularly speaks at and chairs conferences attended by physicians, the media, politicians and the food industry on subject matters relating to health, politics and nutrition.
There's no one "Mediterranean" diet. At least 16 countries border the Mediterranean Sea. Diets vary between these countries and also between regions within a country. Many differences in culture, ethnic background, religion, economy and agricultural production result in different diets. But the common Mediterranean dietary pattern has these characteristics:
Also don’t weigh yourself everyday, your weight will fluctuate a lot on this diet due to water loss/retention cycle (particularly if you’re a woman), if you want to weigh yourself regularly then pick a day of the week and do it at the same time every time (like Sunday morning after you’ve woken up and been to the loo etc but not had breakfast yet), otherwise though just go by whether your clothes are getting looser slowly over time (they will).
A 2013 study conducted by the German Research Center for Food Chemistry indicates that even just smelling EVOO may lead to greater feelings of fullness: when the scent was added to foods via an aromatic extract, it lowered the number of calories consumed by study participants, and improved blood sugar response. Additionally, compared to other oils and fats, when EVOO was added to yogurt, the group that had eaten the yogurt enriched with olive oil showed the largest increases in blood levels of serotonin, a hormone associated with satiety.
Sleep enough – for most people at least seven hours per night on average – and keep stress under control. Sleep deprivation and stress hormones raise blood sugar levels, slowing ketosis and weight loss a bit. Plus they might make it harder to stick to a keto diet, and resist temptations. So while handling sleep and stress will not get you into ketosis on it’s own, it’s still worth thinking about.
You also need to consume coconut and other healthy fats in order absorb fat-soluble nutrients found in various foods. These include nutrients like beta-carotene (a precursor of vitamin A found in plants like berries, squash and leafy greens), vitamin E, calcium, magnesium, phosphorus and lutein. When you consume a healthy diet filled with lots of different whole, plant foods but don’t get enough healthy fat sources at the same time, your body is basically not capable of utilizing these nutrients as well.
Picking through the data, the researchers found that the extra olive oil group did slightly better than the extra nut group, but both were clearly superior to low fat diets. The research was also much more reliable than many diet studies because it was a randomised control trial that looked at a large group of people over a long period of time, rather than just monitoring people on one diet for a few days or weeks.
The diet primarily consists of foods and ingredients that are very close to nature, including olive oil, legumes like peas and beans, fruits, vegetables, unrefined cereal products, and small portions of animal products (that are always “organic” and locally produced). In contrast to the typical American diet, it’s very low in sugar and practically free of all GMOs or artificial ingredients like high fructose corn syrup, preservatives and flavor enhancers. For something sweet, people in the Mediterranean enjoy fruit or small quantities of homemade desserts made with natural sweeteners like honey.
And monounsaturated fat isn't the only thing olive oil has going for it nutritionally. Some olive oils come with phytonutrients that may offer their own disease protection benefits (still, it's not clear whether most of us can take in enough of these phytonutrients without going overboard on olive oil, says Joyce Nettleton, DSc, RD, researcher and editor of the PUFA Newsletter).