Can You Donate Plasma If You Smoke Weed? My Marijuana Cards Does Nicotine Free Vaping Affect Your Blood Vessels? What Science Tells Us Medic Pro 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 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