Because the more someone exerts themselves the more oxygen and carbon dioxide out put ratio is greater. The more you run and the faster you run the more oxygen you loose which is supplied to your muscles including your lungs.
Vitamin a
vitamin d
vitamin e
vitamin k
Humanity? Hope this helps
There is no specific answers for this. People might have specific allergies to something like peanut butter , but anything like medicine that is not recommended for you might cause you allergies and bad stuff
