There is no essential Carbohydrate, your body can produce the energy.
There are essential proteins and fats that you must get from your diet.
For Keto, the key is making sure you get the nutrients, you’ll need to eat some non-starchy vegetables and fruits (Avocado is a fruit) to get those nutrients, but you shouldn’t go over 20 grams of carbs to get those nutrients.
Exactly. Humans can manufacture carbs from protein. The nutrient part is tricky for the Eskimos. Some of their diet is raw which is why they don’t get into trouble with certain essential vitamins.
Caveat - eating raw (or undercooked) wild meat can be deadly if you don’t know what you’re doing
There are no specific essential carbohydrates (as with the eight/nine amino acids, or the two essential fatty acids), but carbohydrates as a macro-food group are a natural and necessary part of the human diet. The body does store carbohydrates to a limited extent as glycogen, in the muscles and liver.
It is difficult, if not impossible, to get all needed nutrients in a diet devoid of caloric carbohydrates. (Nota Bene: Most fruits contain caloric carbohydrates; avocados are a great exception.)
We do not live in a natural way - in almost any dimension. We do not forage or farm, expending calories. People over-consume caloric (and often nutrient-deficient) carbohydrates, and then sit for hours. Since the body does not burn those calories, they are converted into body fat as stored energy, once the glycogen limit has been exceeded (which is easily done in sedentary individuals).
The Keto Diet is indeed not suitable for continual use: It is too acid-forming systemically (which in the long term promotes numerous degenerative conditions, including especially osteopenia), and too hard on the kidneys and liver. For short term, intermittant, use by persons with healthy kidneys and liver, it can be quite effective.
I nearly died thirty years ago. I studied natural diet and nutrition, and stopped visiting doctors. (I have not consulted with a Medical Doctor since 1995, although if I broke a limb tomorrow, I would immediately do so: trauma, yes, prevention, no.)
My body fat (measured three ways before and after at a college fitness center) went from c. 22% to c. 11%.
(Since I am physically, and legally, disabled, extensive exercise was not an option for me. I had to rely primarily upon diet.)
My current body fat is c. 12-13%, and my waist is 29”. I achieved all of the many benefits through food combining, natural hygeine, herbal cleansing, and nutritional supplementation.
I never once had to resort to the Keto Diet, or its functional equivalent back then, before it became the rage.
I have assisted many over the years, as a I worked as a nutritional consultant in the supplementation industry, and have published one ebook on diet and nutrition, and am writing more. Mine is an informed opinion.
Reading your comment, I was taken aback at how similar in tone and ignorance it is to the left talking about guns.
Truly. I’m talking stupid-stick material. Continue keto long-term at your own peril, but cease preaching hysterical ignorance.