The NCS will enroll participants who plan to use cannabis but have not yet started cannabis use. The Study’s success relies on users’ willingness to share their experience through secure online surveys that take approximately 30 minutes. The survey will include questions related to mental and physical health, functioning, quality of life, and use of medications (including cannabis and cannabis derived products). Some participants will also be invited to complete surveys using an app on their phones or have blood tests done to measure changes in health. If you are planning to begin using cannabis for medicinal purposes, with or without the guidance of a medical professional, you likely qualify for participation. Each eligible participant will receive a $25 Amazon gift card.