From what I can tell nearly all of the stuff on diet and exercise is driven by someone wanting to make money. Quite a lot of charlatans out there.
Eating a healthy diet from all food groups is best for health.
I think the word keto is over used and often silly thing to say-- a buzz word used to make someone money. Going into ketosis is not a good thing for your kidneys so I would bet most of the so called keto diets do not put someone into the dangerous state of ketosis.
We need to eat the right carbs to live. Complex grain carbs. Most people can be much healthier by cutting white sugar and sugar free foods. Cutting processed baked goods and eating home baked goods too. Processed baked foods have very nasty chemicals in them that I do not add to my baked foods.
I have posted before that the key thing is to eat a diet that is sustainable. The Atkins diet was more sustainable but still not as good as eating lower calories of a diet that does not cut out an entire food group.
Look at the science.
In the world I live in keto has a definition: a diet in which the body produces ketones.
Yes, the right carbs. Carbs are not a required nutrient techically. However, they go along with a whole package of nutrients which are beneficial. Lots of green leavey vegetables and small amounts of drupe fruits are great.
It is what a bear does when it hybernates. It uses its fat stores to live over the long winter. Ketosis is not dangerous. It is natural. IT is something that we Americans have lost as we eat many times a day in a constant state of "fed" and never allowing the body to switch to using its fats.
THere is a whole area of research now looking at how fasting allows the body to repair at the cellular level, and mitochondria cannot rejuvinate in the fed state. ALso in a fasted state, Growth Hormone rises to fix and repair. THis is something that ddropss greatly in us 50- somethings and older.
Bottom line is ketosis is necessary to mobilize the extra body weight people like me carry. Because it is the process of burning fats for energy. As long as too many carbs are consumed, the body cannot switch to burning fats.
Not every one is in it for the money. Like everything, learn to find the real deal. Dr Jason FUng and many others put out info that is free. Look at all that is out there for free. He is a kidney doctor that was frustrated by all his patients on dialysis. He started IDM program.com which is basically free. DIetDoctor.com is basically free.
Dr NOakes survived a 4 year law suit by the South African Medical establishment and wont on all 15-16 counts. He is a keto convert. ANd while his legal defense cost some $1 million, he said in the weeks after the final verdict, it was the best money spent as it put food choices and keto on the world stage for less than the cost of an advertising company.
It helps to get to know the science behind food, diets and fasting and insulin..... and learn to sift the facts and the truth from fallacy. We are lied to by many factions..... and even medical doctors are woefully inadequate..... they are the last place I look to for information other than a diagnosis.