Choosing to use natural medicinal cannabis (marijuana) to combat various health symptoms might be an option for you. If so, you may be the type of person that prefers to avoid synthetic and potentially harmful chemicals.
Since marijuana is a natural plant, some growers may use chemicals such as pesticides when growing their product. Some states prohibit such uses, others may not.
This study shows that chemical residues can reach levels of 69% transfer into mainstream smoke and ultimately into you, depending on the type of smoking apparatus. It is advised to avoid this scenario in order to avoid further potential health complications.
What should you do? If your state does not have mandatory testing to ensure no pesticides or other residues are present on your natural medicine, you should probably choose a dispensary which has grown or purchased lab tested and verified residue free medical marijuana.