"Carbohydrate tolerance" refers to the body's ability to process and handle carbohydrates efficiently. It measures how well a person's body can digest and manage the sugars and starches found in foods. Full definition
And the diet comes first because the fast metabolism and high carbohydrate tolerance are your biggest obstacle in relation to weight gain. (fitnessandpower.com)
The main characteristic are being insulin dominant, having a slow metabolic rate, and low carbohydrate tolerance. (bodybuilding-wizard.com)
In the end what works for one may not work for another and we all have different carbohydrate tolerance and different protein requirements. (ketodietapp.com)