Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: Don't know exactly, but I can estimate about 2.6k calories a day, altough some days it may be Less and some a lot more. ### Response: Also, you can't say it's "100% not that" when you haven't ever measured your calorie intake.It's like saying your checking account is getting lower and lower and you don't know why, but you've also not looked at the math for your income vs. expenditures."You're not earning enough money for how much you spend."Nah, can't be that! I'm certain."Have you actually looked at you budget?"Nope.Unless you have some malabsorption disorder where you can't absorb nutrients (these people have constant diarrhea, gas, belly pain, and even oil in their stool), you just aren't eating enough calories.That's not enough.Young men, especially active young men, typically need 3,000-4,000 kcal to gain weight.Anything in the low or mid 2,000s isn't going to cause weight gain.This isn't a medical mystery. Eat more food and workout. You need r/gainit, not an inpatient stay (assuming no eating disorder)..