Gases- Oxygen, hydrogen, carbon monoxide, nitrogen
It depends what way u make it u can make one in 5 min but u can also do one that takes longer
Most likely your body won't be as harmed the 2nd time due to the preparation of your cells.
The basis for physical fitness is having a good eating habit, which means to know what you are eating and to eat cleanly. Exercise at least an hour every day and drink plenty of water throughout the day.
