Dr. Campos, it is so discouraging to see that you disparage the ketogenic diet based on your assumption that it is very heavy in poor quality processed meats. No diet that relies on processed foods can be viewed as “healthy”. Become better informed by getting up to speed with what Jeff Volek, RD, PhD, calls a “well-formulated ketogenic diet.” Also, learn more about the potential of the diet to slow cancer progression (my specialty). You owe it to your patients who are depending on you for advice. Present them with facts, not opinions.
At the first visit, participants were instructed how to follow the LCKD as individuals or in small groups, with an initial goal of ≤20 g carbohydrate per day. Participants were taught the specific types and amounts of foods they could eat, as well as foods to avoid. Initially, participants were allowed unlimited amounts of meats, poultry, fish, shellfish, and eggs; 2 cups of salad vegetables per day; 1 cup of low-carbohydrate vegetables per day; 4 ounces of hard cheese; and limited amounts of cream, avocado, olives, and lemon juice. Fats and oils were not restricted except that intake of trans fats was to be minimized. Participants were provided a 3-page handout and a handbook [11] detailing these recommendations. Participants prepared or bought all of their own meals and snacks following these guidelines.
Author’s note: I want to stress again the importance of consulting with your doctor before you try ketogenic dieting. The more I study this area of science, the more I realize that every individual is extremely unique when it comes to health issues and there are a ton of reasons why you should NOT go full-on keto (especially if you are prone to kidney, heart, or gallbladder issues). That being said, for many people this form of eating is life changing, and the amount of scientific research supporting a ketogenic lifestyle is significantly increasing. Subscribe to my newsletter to stay posted when I publish new articles, and I’d appreciate any and all feedback/corrections on the content I’ve written above. Thanks! (Image credit)
Yes. The ketogenic diet is very healthy. As a matter of fact, it comes with lots and lots of health benefits which we have already looked at. Even though this diet comes with a few side effects, it comes with a lot more health benefits ranging from providing more energy to helping with weight loss and controlling blood sugar. In all, the ketogenic diet is a very healthy diet.
Since our body isn’t used to using ketones, we tend to feel flu-like when in ketosis. Lots of brain fog, fatigue, headaches, nausea and poor endurance. You also get bad smelling breath, sweat and pee from the acetone (a byproduct of fat metabolism). Sexy? Not so much. Thankfully, if you are in ketosis long enough, a lot of people report that most of these side effects start to go away.

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If you are pregnant or are nursing, you should not follow a Ketogenic diet. You will not receive enough of the recommended carbohydrates, vitamins and nutrients necessary for yourself and your growing baby on this diet. Your obstetrician will recommend how many carbohydrates you should consume per meal and for snacks during each phase of your pregnancy. They will likely refer you to a Certified Diabetes Educator for nutritional counseling as well. Please check out The Diabetes Council’s FAQ’ About Gestational Diabetes for all your gestational diabetes related questions.

It may seem unusual that a diet filled with fats could be a positive for your heart, but that’s exactly what Dr. Phinney suggests. “In the one-year study, 22 of 26 cardiovascular risk factors significantly improved. Most notably, these patients experienced a mean fasting triglyceride reduction of 24 percent, an 18 percent increase in good HDL cholesterol, and significant reductions in both systolic and diastolic blood pressure.” For all of these findings, Dr. Phinney notes that research into the benefits of keto is still in its earliest stages. “The fact is, there is not yet any long-term, peer-reviewed data that connects some of these improvements to nutritional ketosis,” he says. Read more about the 11 hidden dangers of the keto diet.
The relation between a high fat diet and cancer is not conclusive. Recent epidemiological studies (17,58–60) could not explain a specific causal relationship between dietary fat and cancer. It has been found that altered energy metabolism and substrate requirements of tumour cells provide a target for selective antineoplastic therapy. The supply of substrates for tumour energy metabolism can be reduced by dietary manipulation (eg, ketogenic diet) or by pharmacological means at the cellular level (eg, inhibitors of glycolysis or oxidative phosphorylation). Both of these techniques are nontoxic methods for controlling tumour growth in vivo (61). Sugar consumption is positively associated with cancer in humans and test animals (58–61). This observation is quite logical because tumours are known to be enormous sugar absorbers. It has also been found that the risk of breast cancer decreases with increases in total fat intake (16). Further studies on the role of a ketogenic diet in antineoplastic therapy are in progress in our laboratory.
Fats produce more energy as compared to proteins or carbohydrates and this quality of theirs renders them very helpful in ensuring that the body is sufficiently energized. Since your body is using up fat for providing energy for the whole reaction system, the fat content decreases over time. This happens since the fats are not in the adipose tissues now. Instead, they are being broken up as they are ingested. This further prevents obesity.
Certain Cancers Keto may be used in combination with chemotherapy and radiation, some studies have suggested, including one published in November 2018 in the journal Oncology. (12) But ultimately more studies are needed to determine if keto can play a role in cancer therapy, and patients should not use it as a stand-alone treatment or without a doctor’s consent.
If you’re science oriented, you can also try his 2008 book “Good Calories, Bad Calories”. For a more journalistic view on the events that led to fat phobia starting in the 1950’s (as well as the joke that is the Mediterranean Diet), there is also Nina Teicholz’s 2014 book “The Big Fat Surprise.” Be sure to check out youtube for some of these folks’ lectures and discussions. They are not advocating whacky stuff.
He was wrong. Originally used for epilepsy, studies show that keto diets are far from dangerous. In fact, they benefit numerous conditions, including cancer, dementia, and overweight/obesity, and modern history only supports these claims. During the early 19th century, physicians had dramatic success implementing keto diets, yet they eventually found that prescribing drugs was much easier that than scrupulously monitoring what people ate. (1) 
I, too, am finding the keto diet to be beneficial. My weight is moving down. My recent A1c was 5.7. I am consistently below 90 each morning when I check my blood. I am learning to adapt my cooking to the needs of maintaining this way of eating. I have incorporated walking because now I FEEL like it. I don’t feel deprived. I feel empowered. No medications for diabetes!
If you’re wondering why iron is at risk on a meat-based diet, hear me out. Many grain foods provide a considerable amount of iron, because wholegrains naturally contain iron in their inner layer called the ‘germ’. Another reason is that some grain products can have iron added to them during manufacturing. So, once you cut grains out, your iron status could suffer, which can lead to unpleasant symptoms like tiredness and lethargy. It can even compromise your immune system.