A stroke occurs when a blood clot blocks a blood vessel or artery, or when a blood vessel breaks and interrupts blood flow to an and bleeding occurs into an area of the brain. Every stroke is different.
ETA Chlorophyll works on the Liver and probably works a little. No it really doesn't, you are not a plant. Tea will oxygenate the blood. No it won't Also don't do as someone else said and drink liquid oxygen, that's really not a good idea.
Breathe fresh air. You can increase blood oxygen by breathing fresher air. Allow fresh air to permeate all the rooms of your office, home and car. Open the windows in your bedroom before you go to sleep. Eat foods high in Vitamin F (essential fatty acids). This vitamin increases the oxygen holding capacity of the hemoglobin (the chemical that holds oxygen) in your red blood cells. Foods rich in Vitamin F include avocados, walnuts and soybeans.