So we do have a lot of research on how bad just nicotine is for you. And it's close to 5% as harmful. We also know how bad polyethylene glycol is for you, and

So we do have a lot of research on how bad just nicotine is for you. And it's close to 5% as harmful. We also know how bad polyethylene glycol is for you, and it's not that bad(it's used in medical devices). So most of the unknown risk is concentrated around device and flavorings.