Page 1 Reviews Seeking Health, Glutathione with Cofactors, 60 Lozenges iHerb Jesse Joshua Smith UT MD Anderson David C. Rice UT MD Anderson It's scary finding out that you, or your kids, have a MTHFR variant. I freaked out when I learned that I have the MTHFR compound heterozygous 677 and 1298 variant. This variant NAC is a great supplement. It's awesome stuff to support healthy lungs. NAC is a known mucolytic. That is a fancy term meaning breaking up mucus. Now, research does show that NAC