Jon (Australia) on 10/28/2014: N-acetyl-cysteine (NAC) = great for detoxing lungs - helpful for smokers or people who used to smoke! ?
If you smoke or used to smoke and want to clean out your lungs try NAC, this is an indispensable product.
Aside from increasing your body's production of glutathione, essential for liver protection, NAC is particularly effective in clearing your lungs of damaging carcinogens or any other detrimental pollutants.
In fact, if your dog is silly enough to go after a skunk and gets sprayed, and you take it to the vet, the first thing the vet will do is give it a 1K mg shot of NAC to clear its lungs of the spray, which can be toxic due to its preventing your dog's ability to breathe with that oil covering the oxygen intake cells. So, for liver or lung protection/healing, NAC is essential and well worth the relatively minor expense, considering the benefits of taking it in contrast to the damage done if you don't use it regularly while smoking.
This worked very well for us and its effects were immediately noticeable. It should be taken between meals with a B-6 tablet and 50mg of vitamin C in order to get the greatest benefit. I would recommend 2x 600mg capsules per day taken separately between meals for anyone needing the benefits of NAC. (If you smoke, you will cough more because your lungs are being cleared of tar and toxins.)