Nonsense. What is your source?
If you consume a high-fat, low-calorie diet, your body will produce compounds known as ketone bodies as it burns fat. This can trigger metabolic acidosis. Most people would want to avoid this because metabolic acidosis is commonly found in patients with chronic kidney disease. So yeah, Keto diets are hard on the kidneys, which is why they are not meant to be long term solutions for weight loss.
Keto is not low-calorie.
You should not consume less than 1700 calories a day on a Keto diet.
The good news, is that it’s the easiest thing to do, since you don’t get all that hungry, especially when you combine Keto with Intermittent Fasting.
No, you are wrong. Metabolic acidosis’s six causes have nothing to do with a Keto diet.
https://medlineplus.gov/ency/article/000335.htm