I got NAC at Wal*Mart as a prophylactic for COVID. $20 for 250 pills, 600mg each. Take it once a day. Haven’t noticed any changes.
Be glad you have not noticed any changes which means you have not had any problems which need to be addressed. Similar to taking an aspirin, you may take it to get rid of a headache and and after that the headache may be gone. If you don’t have a headache of course you will not notice any effects. And while we are at NAC N-Acetyl-Cysteine and NOT Acetyl-L-Carnitine always remember to take at least two to three times as much C otherwise it could do more harm than good. Check my previous post about some detailed info about NAC. Stay healthy and well my friend.