How can you increase oxygen in the blood?

You never said that the oxygen had to be attached to hemoglobin, so this really doesn't have much of an impact. If you really want to increase the PURE OXYGEN in your blood, I suggest an oxygen tank.

I'm kidding, but avoid breathing in pure oxygen because it can be fatal in excess.

The oxygen tank would take care of the rest. The body's ability to use hemoglobin to carry oxygen away would be overpowered by the high oxygen levels in your lungs.

With nowhere to go, the free oxygen would attach itself to proteins in your lungs and interfere with the functions of your central nervous system, flooding your body with so much oxygen that it becomes toxic and shuts down, killing you.

In conclusion, kindly refrain from attempting to raise your blood's oxygen content:

You can increase oxygen in the blood by:

1. Deep breathing exercises
2. Regular aerobic exercise
3. Increasing intake of iron-rich foods to support red blood cell production
4. Ensuring adequate hydration
5. Avoiding exposure to air pollutants
6. Using supplemental oxygen therapy if prescribed by a healthcare professional.