it's not easy to stop, even more if you are plagued with symptoms and anxiety and everything else, terrible stuff for your health, im a pack a day smoker also.. im reading what is good for your lungs, iodine(lugol) cycles , not continuously due to how it may affect your thyroid .. sodium bicarbonate.. collostrum and thymus(thymosin)
Sadly we can't rely and play around with supplements that are of help,... like tau , I think that it affects gaba receptors, from what I saw ... it is great to aid for you to stop smoking, but you risk a setback...