Try eating 1,800 calories a day of cellulose and see what happens.
Sarcasm aside, your body is not 100% efficient. Food type does matter. Just not in the fatlogic, "I ate 10,000 calories of fruit, that's healthy," way.
Breaking down proteins requires more energy than sugar. There's overhead. So... no. 1800 calories of meat vs 1800 calories of cotton candy will not yield the same results. The first part of "Calories-in, calories-out" isn't based on the value of the food when it enters your mouth. It's based on the energy actually being input into the system.
Try eating 1,800 calories a day of cellulose and see what happens.
Sarcasm aside, your body is not 100% efficient. Food type does matter. Just not in the fatlogic, "I ate 10,000 calories of fruit, that's healthy," way.
Breaking down proteins requires more energy than sugar. There's overhead. So... no. 1800 calories of meat vs 1800 calories of cotton candy will not yield the same results. The first part of "Calories-in, calories-out" isn't based on the value of the food when it enters your mouth. It's based on the energy actually being input into the system.