[Kayou]

You still need to have carbs in your diet, it wouldn't be healthy otherwise. Especially if you practice a sport.

I eat whatever I want (mostly pasta usually) and I need 20 units a day at most. (100 units/ml dosage).

[theorique]

There's no dietary or metabolic need for carbohydrate. The human body can survive and thrive perfectly well with only fat and protein as macronutrients. Practically speaking, doing that is challenging and complicated because most foods are a mix of all three macronutrients.

[Kayou]

But do you need sugar? Or you don't need either sugar nor carbs? It seems strange to me. EDIT: it seems that if you use only your fat, you'll end up producing too much Ketones which leads to Ketoacidosis. Doesn't sound good.

[nunb]

Doctors Phinney and Volek would disagree on the carbs/sport connection.

[Kayou]

Then they should come with an explanation as to why I want to throw up and can't do anything when doing sport with no insulin to use my carbs.

[tsomctl]

No you don't.

Source: The Art and Science of Low Carbohydrate Performance by Phinney and Volek

[nugi]

This is patently untrue.