I've seen some how to smoke weed articles but I have never come across this question, is holding in your rip bad for you? When my friends smoke they always hold the smoke in their lungs for a long time. They try and hold it in as long as possible. What brings me to ask this question is because a very experienced smoker from California told me that holding the smoke in is bad for you. He said you are cutting off the oxygen supply to your brain and that is what kills brain cells. He said you should just inhale it and exhale it right away. What do you guys think? I don't want to kill brain cells by holding my breath. I just want to smoke right!