The answer is sweat glands, not sweet glands :)
Pretty much all the other answers don't come even close for consideration. Small intestines have no way of excreting salts and water outside our body and neither do adrenal glands (these are resposible for the release of different hormones).
A complete blood count (CBC) test
In some very sensitive patients, the smell of cheese can cause an allergic reaction so yes
The least likely explanation for this would be that they're training at different intervals, or one is training harder than the other.
The most likely reason is that the way the other person's genetics are most people cant gain muscle as well as others because of disease or their body structure.
Hope this helped!
