Cannabis Use and Blood Donation: Unmasking the Truth 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 Can You Give Blood If You Smoke? MD Spiro Vaping is as bad as smoking and it significantly decreases lifespan. Vaping contains ultrafine particles, volatile organic compounds and aldehydes that promote inflammation and damage heart and lungs. Here are scientific evidence