According to science and research, here is what you need to know about the positive and negative effects of cannabis on your body.
Cannabinoids released into your body can latch onto receptors in the brain, which can cause feelings of relaxation and pain relief. The THC in marijuana can increase the feel-good chemical dopamine in the brain. It may also change the way you process information.
When smoke is inhaled it can contain toxins like tar, though research linking pot to lung disease has not be conclusive.
THC can lower blood pressure, which can expand blood vessels and make the eyes appear bloodshot.
Cannabis also affects the central nervous system, which is why scientists think it helps with pain and controlling spasms and seizures.
Cannabis can increase heart-rate for some users.
Reducing nausea is a common effect of cannabis, although for some it can be the opposite.