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 is called the Law of Mass Action. Very little oxygen actually gets through, but if you are consistently feeding your body the extra oxygen, there will be an extensive increase in your total tissue oxygen level. The goal is to keep the oxygen level of your blood as close as you can to 100 points.