@jerlands,
You know, I would really like to learn more about you by you sharing your actual real life experiences rather than just providing links and videos, and making proclaimations as to what is controversial and dangerous, and doing that without citing sources.
Damaging in what way? I hope you're not talking about ketoacidosis, which some uninformed nutritionists and other health care people point to.
Many people confuse ketosis with ketoacidosis, which is an extreme and rare form of ketosis almost always experienced by diabetics, which can put them into kidney failure.
Not something your average person would experience....ever.
It's one thing jerlands, to pretend that people live in laboratory conditions as far as what they eat, and what people experience on a day to day basis.
In real life, you more or less float in and out of ketosis without even being aware of it. All it takes might be an extra large serving of brussel sprouts, or eating some carrots mixed in with your broccoli, while at the same time eating a big salad with a lot of onions and red bell pepper. Hardly something that needs to be supervised.
How do I personally know at any given time is I am officially in ketosis? Short answer is, "I don't".
The only sure way to know is through blood testing, which is pricey. The keto pee sticks aren't that acurate. Also, over the long run, you loose interest in monitoring every bite of food, and move on to the business of enjoying life.
I do know without having to waste money on testing that when in mild ketosis, which is the aim, that I experience a general feeling of well being both physically and mentally. Hunger isn't experienced as a sudden feeling, and can be ignored if you're busy, confident that your body has plenty of fat stores that will keep you going more efficiently that glucose.
As far as calling this "cutting edge" science, sure, the chemical interactions actually being observed and the fact they are being recorded is new. However, in actual practice, it's no more than eating like people more or less did pre-1950's or mostly how people ate during the 1800's and before that, and how all humans ate before the development of agriculture.
The reality is, people through most of our existance had lived in a state of ketosis most of the time. Also fasting for various lengths of time.
Only it wasn't called going out of ketosis, or fasting. It was called "Hey, berries are in season!" or "I found a beehive and it's got honey in it" Or "We didn't kill anything today (or even yesterday) on our hunt"
So be specific and say what is controversial, and the source of that controversy.
Considering that the brain works more efficiently on ketones and the body utilizes fat as a clean burning fuel, and that carbs overwork the liver and pancreas because we didn't evolve to handle the overload we have today, and it lowers our lipids because we use the fat we eat rather than store it, what are the dangers? Especially considering that we don't live in lab conditions, and unless you are obsessed with weighing out every gram of food, you body either stays near the border of ketosis more often than delves deep into it.
Hey, sometimes you just choose to have that slice of pizza. Problem solved.
So, what's your personal human being experience with all this?