Last few weeks I suffer from terrible fatigue. I have checked my daily protein intake and it seems to be kind of low - something around 0,27g of protein per pound of body weight a day - in total I'm eating something above 30g of protein a day and my weigh is 110 pounds (50 kg) (I know, it is not much). I'm 21 years old male, 70 inches (180 cm) tall.

I'm eating something around 2200 kcal a day, with 100g of fat, 300g of carbohydrates and 30g of protein.

Can be my fatigue caused by protein lack? Is 0,3g per pound a day really that low?