Eating more carbs doesn’t make your muscles grow bigger when you’re already getting enough protein and calories — your muscles respond more to lifting weights than to how many carbs you eat.

Carbohydrate intake has no significant effect on muscle hypertrophy when protein and total energy intake are held constant.

If you eat enough protein (like 25g per meal), your muscles will grow even if you eat almost no carbs—carbs aren’t needed for building muscle.

Whether you eat a lot of carbs or very few, as long as you're getting enough calories and protein, your strength and muscle growth won't be different after 3 months of lifting weights.

If you're doing a really long, intense workout or two hard sessions in one day, eating carbs might help you lift more—but only if you were hungry or hadn't eaten, not if you're eating the same number of calories from other foods.

If you're doing a really long, intense workout with lots of sets, or working out twice in one day, eating carbs might help you lift more—but only if you were hungry or hadn't eaten, not if you're eating the same number of calories from other foods.