[QSIITurbo]

Keto is the absolute worst you can do as an athlete since carbohydrates are required for fast recovery. No professional athlete would be on keto while training. The idea that an athlete should have even slightly over 1g/kg of protein intake per day is correct. However, over 2g/kg/day poses a risk of permanent kidney damage.

Moreover, losing 4 kgs or more of fat in a month increases the risk for cardiovascular disease: the blood cholesterol levels of the subjects may rise to unhealthy levels. Some are resistant to high cholesterol, but statistically it's a risk.

[cableshaft]

Keto can result in (somewhat) worse performance depending on how professional you're trying to be and what activity you're doing, but most people aren't trying to compete at that level and they can work out while on a keto diet.

Also, some people up their carb intake a little before their workout, so it'll burn off and they'll still be in keto afterwards while not risking performance loss.

Finally, you don't double your protein intake on keto, you replace your carb intake with fat, so you wouldn't be at 2g/kg/day danger levels you're suggesting if you're doing the diet properly.