I’ve read about low carb diets being hard on the kidneys and liver, as poisons form in the liver due to ketosis.
SCD is not in the true sense of the word a low-carbohydrate diet. Because you’re still taking in carbohydrates, just in the form of simple sugars. So we can’t really talk about ketosis. It can be challenging for the liver if you don’t maintain variety and overdo it with your daily consumption of nuts and protein in general.