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.
This allows the hemoglobin inside them  to bind oxygen from the air. The red blood cells then circulate  around the body. When they reach a body part that is low in oxygen,  it automatically drops off their hemoglobin. This way, red blood  cells supply the entire body with oxygen.