Is it time to bring NAC back as an approach in treating neurogenerative disease?

If you’ve browsed the health product aisles at your local grocery or specialty store, you may have noticed NAC, or N-acetyl cysteine, which is a supplement form of cysteine. Cysteine is a non-essential amino acid found in high-protein foods such as beef, chicken, eggs, and whole grains. What makes cysteine semi-essential is that your body can produce it from two other amino acids - serine and methionine. 

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