I would go as far as to say it is good for you!

Saw a study years ago (long before the days of vaping) which compared the lungs of pure green smokers with joint smokers (green/tobacco mix) & non smokers. And it turned out the people who had the healthiest lungs were the pure green smokers! So... it pays to be a smoker if you're smoking the right thing ;)

Puff puff pass...