Vaping Cannabis Produces Stronger Effects Than Smoking Cannabis For Infrequent Users Johns Hopkins Medicine Can Cannabis Users Donate Blood Red Cross Can You Donate Plasma If You Smoke Weed? CGM Monitors If you use cannabis, do it safely Harvard Health How to Quit Vaping, According to Experts The New York Times We all know smoking and vaping isn't great for your health. But it doesn't stop you from being a blood or plasma donor. Just make sure to wait one hour after donating