My understanding is that marijuana can depress cell activity a bit, this means systems your body needs to constantly maintain will degrade, the heart being the system needing the most constant maintenance, essentially you could see his like accelerated aging. It draws into question regular use for cancer patients, you could probably prove the relationship by correlating glaucoma patients to heart disease patients. This was known and not published for some time i suspect, it's being published now because they need to displace as much blame for the boosted mortality rates from the jab. but I suspect it's still true.