Short for N-acetyl cysteine, NAC is the supplement form of cysteine, an amino acid found in protein-rich foods such as beef, turkey, eggs, fish, and nuts. Because your body can produce it from the amino acids methionine and serine—also found in high-protein foods—it’s classified as a non-essential or conditionally essential amino acid.
Cysteine is necessary for the production of glutathione, one of the body’s most important antioxidants. Called the “master antioxidant,” glutathione protects against free radical damage to cells and plays a critical role in immunity, healthy aging, and disease prevention.
By promoting glutathione production, NAC supports immune health, and supplementing with NAC has been shown to enhance the activity and function of immune system cells, to inhibit replication of the influenza A virus, and to significantly reduce flu-like episodes and symptoms. Now, some researchers suggest that NAC may have potentially powerful actions in preventing or treating Covid-19.
But NAC offers benefits beyond immunity. Some highlights:
1. Lung and respiratory function.
Continue reading your story on the app
Continue reading your story in the magazine
From No Meat to Grass-Fed Red Meat
Some vegetarians are rethinking the reasons they adopted a plant-only diet—and rediscovering high-quality animal protein, particularly pasture-raised meat.
Light Summer Refresher
Take a break from hot weather with this antioxidant-packed, cooling treat
Men's Health HANDBOOK
Advice for preventing and treating ailments that most commonly afflict men.
The Anti-Cancer Diet
Disease-proof your plate with science-backed foods shown to reduce cancer risk.
How to deal with intestinal distress the natural way.
5 Steps to Reverse Pandemic Weight Gain
How to shed the pounds you may have picked up after a year in social isolation.
5 Reasons You Need NAC
It’s best known for promoting a robust immune response, but NAC does so much more—and new research suggests that it may even play a role in protecting against Covid-19.
Collagen for Heart Health
This popular anti-aging supplement for joints and skin also boasts impressive cardiovascular benefits.
Are You Gluten Free And Healthy?
If you’ve developed unwanted weight gain or heart disease risk factors after eliminating gluten from your diet, better carb choices can help balance blood sugar and insulin levels to take you to a new level of health.
7 Super Brain Boosters
Maybe you find yourself trying to remember why you needed to go to the grocery store. Or wondering where you parked the car after a movie. Or questioning whether or not you’ve already fed the dog. If so, it might be time to consider adding some of these brain-enhancing herbs to your supplement routine.