How much of the oxygen in our bodies comes from water?

Question

65% of our body is oxygen and 60%-90% of our body is water, so how much of that 65% oxygen is from water?

In: Biology

Answer 1

The vast majority of it. Smaller amounts come from the various proteins, carbs, and vitamins we eat, and even more from the air we breathe, simply because oxygen is a good molecule for making chemical bonds. But because we have so much water in our bodies, we also have an absolutely huge amount of oxygen.