As I wrote in op-eds for the Wall Street Journal61 and Medscape,62 the Lancet Public Health study is based on very thin data. The questionnaire underlying the report left out questions regarding popular foods, such as pizza and energy bars, and did not consider alcohol consumption. Moreover, the “low-carb” diet group in this study included people eating up to 37% of calories as carbohydrates—not low-carb according to the latest science. Ultimately, this is the kind of data that can show association but not establish causation, which means it is the kind of data one can use to generate hypotheses but not prove them. This kind of data would never be considered sufficient to approve a drug, for instance. The same standards should be applied to diet. Quite a few researchers, including myself, had our critiques published in Lancet Public Health.63 The authors replied but did not respond to most of the criticisms.
But beyond that, experts aren't convinced that the keto diet has any other scientifically-proven health benefits. In fact, it may have some distinct downsides. If you follow the keto diet incorrectly, for example (like by eating lots of saturated fats, versus healthy unsaturated fats), you're at risk of raising your cholesterol levels. “The best strategy to keep your heart healthy is to get as much fat as possible from unsaturated sources such as olive, avocado and canola oils, nuts, seeds, avocados, and olives," says Ansel.
Coal, on the other hand, burns evenly, and continues to burn for hours. Not only that, but it is fairly simple to adjust the amount of coal you burn to keep the house nice and warm, but not hot, for extended periods of time. The only problem is, it is kind of a hassle to get it to start burning at first (again, in the analogy we are assuming you are simply trying to light bare coal on fire, no aids). But once it is started, maintaining it is no sweat. So what is the solution? You use a tiny bit of kerosene, which lights easy and burns hot, to get the coals started (we need a few carbs, but not much).
Below is a quick graphic of a meal plan on the traditional Mediterranean diet, it is the same meal plan that I also follow. Under the graphic you can find details, tips and links to the recipes. I provide a variety of choices for meals that you can mix and match with links to the recipes. For more ideas just head over to the Recipe Index and you will find a large selection of Mediterranean recipes.
When compared to the calorie-restrict diet, the subjects who underwent the ketogenic diet experienced a reduction three times greater in hemoglobin A1C (1.5% vs. 0.5%).  In addition to observing greater improvements in diabetes-related markers, researchers observed a greater reduction in medication usage in subjects that underwent the ketogenic diet treatment. Thus, due to their overall findings, the researchers stated that “Lifestyle modification using low carbohydrate interventions is effective for improving and reversing type 2 diabetes.” 
I have T2D and IBS and my blood sugar readings were degrading. I was going to have to take a second daily dose of Metformin and the first one already played havoc with the IBS. I started a low-carb diet because my T1D husband had been inspired by a podcast by Sam Harris with scientist Gary Taubes, author Why We Get Fat, Good Calories, Bad Calories and the Case Against Sugar, and started dumping the majority of his carbs a month previous. He had cut his insulin use literally in half and lost 15 pounds. He was feeling better and visibly had more energy. I was resistant to the diet and even the idea of it. I have been on Atkins and Sugar Busters and while I did fine on Sugar Busters back in the day, Atkins was too fat-based and that was the opposite of how I had been raised to think about dieting. I knew that the Diabetic diet given to me by the Diabetic Educator had never been enough and I get carby binge cravings even though it offers plenty of carbs and calories. I also knew that it’s a cycle for me-eat more carbs, want more carbs, and never really feel satisfied. On top of that, when my stomach hurts I seek carbs, and it hurts quite often. I did Weight Watchers and the Diabetic diets because they let me “cheat” and have my carbs while dieting. To be fair, just the act of tracking my food improved my outcome on either. But I got mad at WW when they upped the points for carbs on their system and made it so I couldn’t eat cake for lunch if I wanted to. Not that I made a practice of it, but it was principle of the thing. Long story short, I was pretty doubtful that I would be very successful on Atkins or Keto. To humor my husband I began a low-carb diet that started out as Atkins 20 or Keto and has morphed to more of an Atkins 30-40 for my personal comfort while using Keto, Atkins, and Paleo recipes and ultimately cutting all gluten. That means 30-40 net carbs per day, rather than per meal and a lot of natural non-processed foods. The first week was quite terrible. But even through the Keto Flu I recognized that my IBS symptoms felt better. I started to suspect that if I felt that bad just from quitting carbs that maybe there was more to the idea of sugar addiction than I wanted to believe. I’m six weeks in now and I’m losing a steady pound a week plus my sugars have dropped radically. A pound a week might not sound like much but it’s more than I’ve lost in 10 years. I have PCOS and insulin resistance so I’ve had a fasting blood sugar that ranged from 109-113 since my early twenties. It was flying high around 160-170 before the diet, now I’m reading between 119-139. Even more than that, my IBS symptoms stabilized. I’ve been tracking all my food using the free Atkins meal tracker so I started trying to narrow the foods that caused flare ups. I’m lactose intolerant but I knew that and used lactose free products or Lactaid for the cream based dishes. I had my gall bladder removed and so have always put down my symptoms to an inability to process dairy and fats. Big surprise to find that a higher fat, higher dairy diet was making my symptoms disappear. Gluten is the only common factor so far. Celiac? Just a food sensitivity? I don’t know, but that will be the next investigation. It is an investigation that I would never have thought to start on the Diabetic diet. Like the author, I’m very fond of cake and carbs. Luckily there are low-carb, no-gluten recipes for muffins and cakes. They aren’t exactly the same and some are definitely better than others, but they are out there. Plus, there is nothing wrong with having true birthday cake once a year if that is really what you need and if you don’t have a reason to avoid it, like binge symptoms or IBS flare ups. My husband let himself have a piece of cheesecake the other day and felt physically awful for two day after, plus he had to use a lot of insulin to counter the spike. It’s a pretty good deterrent. Just a side note but I had other symptoms of inflammation as well. My ankles were swelling to golf ball size and painful, it was difficult for me to stand and walk comfortably when this happened. While they haven’t stopped completely, the discomfort has gone way down as has the swelling and frequency. What’s my point? I’m not a salesman for a particular diet. Everyone is different and some people might respond very well to Keto and/or Atkins while others may not need anything that extreme. I’m not knocking the Diabetic diet. My dad lost 150 pounds 38 years ago on a very low calorie/low carb Diabetic diet that gradually increased and he has kept the weight off all this time and kept his blood sugar steady with medication, but has not had to go to insulin even at age 84. Also, he was a smoker, a diabetic, had hemochromatosis and was over 300 pounds with an apple body shape. He has had some fall out from this-he didn’t stop the smoking until a heart attack 20 years ago and that didn’t help. But he has made it to 84 and when he walked into his doctor’s office 40 years ago I’m guessing the doctor wouldn’t have put any money on that survival rate. Unfortunately, it looks like I need the lower carb version and will continue to need it to manage my symptoms. I didn’t want it, that’s for sure. But Diabetics are locked in a death struggle with Diabetes and it won’t give up just because we are tired or want our sugar. So for me, it has to be Very Low Carb for Life. Others may find they need this too and discouraging them from trying it is not doing them any favors. Hopefully I will continue to find this sustainable. I just need to keep reminding myself that I am more fond of my feet and my vision than my birthday cake.
And it’s not just this study, either. Several other studies have found that keto leaves rodents unable to process carbs, leads to insulin resistance, and, more long-term, causes non-alcoholic fatty liver disease, which is when your liver accumulates lots of fat and begins to shut down. Triglycerides and inflammation go way up, too.
A systematic review in 2018 looked at sixteen studies on the ketogenic diet in adults. It concluded that the treatment was becoming more popular for that group of patients, that the efficacy in adults was similar to children, the side effects relatively mild. However, many patients gave up with the diet, for various reasons, and the quality of evidence inferior to studies on children. Health issues include high levels of low-density lipoprotein (LDL), high total cholesterol, and weight loss.
And what benefit you will have with “moderate” diets that let you eat bread and others carbohydrates but high insulin ? remember that it is critical to not only look after glucose levels on blood, it is very very important to reduce your intake of insulin to avoid a lot of diseases including metabolic syndrome for high insulin and insulin resistance.
The risks are more long term, such as risk of nutritional deficiency (vitamin c, a, k and b vitamins) and also increased risk of bowel and possibly breast cancer cancer due to limited fibre intake. Ketosis generally isn’t recommended and it’s not exactly a state that would the body would usually be in, but it can be done safely for set periods of time.’