This is a good question. As Austin Southern points out, protein is not an efficient way to store calories. Nonetheless, it would seem that storing amino acids as protein would be advantageous for other reasons. read more
Though the body can’t readily store proteins, it’s found some clever ways to get the nutrients it needs when it gets too little dietary protein. Considering the hardships and food shortage that humans have faced, it wouldn't make much sense if skipping a day of protein intake caused grave health problems. read more
Because your body can't store extra protein, it has to break it down. If you consume protein too close to exercise, your body won't focus on oxygenating and hydrating your muscles optimally because it needs oxygen and water to metabolize the protein. read more
but, we can't just store huge amounts of ammonia because it's toxic. sugars and fats aren't toxic, so we can store them. because of this, our body either quickly utilizes excess ammonia to make nitrogenous compounds like amino acids and nucleotides, or it excretes it via Urea in our urine. read more
Human beings aren't able to store protein, for the most part. The human body can break down its muscle tissue to get certain amino acids, or the building blocks of protein, but it has no specialized cells to store protein efficiently, as it does fat and carbohydrate. read more