so i've read some studies that weed actually has no negative side effects..!

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Mhm and were are these studies? If they aren't on googlescholor then they aren't legit.

I suppose that you mean "cannabis". It's a bit vague when you say "some studies", it sounds as if you were misinformed. It can cause short-term problems and brain damage can be permanent in the long run. I've known adults who tried it as youngsters and now they suffer from persistent hallucinations. Of course, in some countries the beneficial effects of weed on cancer and other diseases have been acknowledged, medical prescription and monitoring provided.

Please make sure you're dealing with the right piece of information -one mistake with these serious things, and no way back.

National Health Service

Other than running the risk of panic attacks (but this is only prevalent in susceptible individuals), cannabis doesn't seem to have any negative side effects. Many studies show its effectiveness in ending the death of cancerous cells. A study showed that tobacco smokers have a higher risk for lung cancer than smokers who smoke both tobacco and cannabis. Smokers who smoke both were no more likely to develop lung cancer than non smokers. This gives evidence that cannabis may help stop lung cancer, which is why many cannabis only smokers don't develop lung cancer.

its probably sites that are coming from old hippies who have been sdmoking their whole life that are making up "facts" There is negative effects like a little lung damage and your brain can be ****** up if you use to much of it but thats basically it.

hard to say really, I'd go on the side of saying it's a lot less worse than alcohol and tobacco. YMMV