This post from 4chan outlines what may be happening. https://media.greatawakening.win/post/8lDmQCNY.png The takeaway is that nicotine and CBD are both helpful. Patches might be better than smoking. Another possible help is NAC or its precursor L-Cysteine. Other things I've seen suggested are statins, shikimic acid, Ivermectin, herbs such as ginseng and horse chestnut. There are a lot of herbs that are touted as "helping the circulatory system" but how can be hard to pin down. They also can interact with regular medicines so be careful, most can be searched for side effects on line.