New staple in my routine
The price-to-quality ratio here is hard to beat; I've already reordered twice. Tastes way better than I expected for a supplement; I actually look forward to taking it.
Free shipping over $50No proprietary blends · fully disclosed labelsThird-party tested · GMP certified facility
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The star rating and review count summarize aggregated product feedback. The written reviews shown below are representative samples and are not verified individual purchases.
4.6
out of 5
The price-to-quality ratio here is hard to beat; I've already reordered twice. Tastes way better than I expected for a supplement; I actually look forward to taking it.
Zero clumping, which I appreciate since my old one needed a whisk every time. Consistent quality across every tub I've bought so far. Packaging is sturdy and the freshness seal was fully intact on arrival.
Tastes way better than I expected for a supplement; I actually look forward to taking it. Label is clear about dosing and the bottle doesn't take up much shelf space.
The flavor is genuinely good — not chalky or overly sweet like a lot of others I've tried. Zero clumping, which I appreciate since my old one needed a whisk every time. My energy through the afternoon is noticeably more stable since I started this.
The flavor is genuinely good — not chalky or overly sweet like a lot of others I've tried. Label is clear about dosing and the bottle doesn't take up much shelf space.
Arrived sealed and well packaged, with a scoop that was actually easy to find. Consistent quality across every tub I've bought so far. The flavor is genuinely good — not chalky or overly sweet like a lot of others I've tried. Not worth the premium — comparable products cost less per serving.
Showing 6 of 37 written reviews

Swanson. GREAT ANTIOXIDANT SUPPORT FOR YOUR LIVER - Free radicals can cause oxidative damage to your liver, but NAC is necessary for the regeneration of glutathione, a potent antioxidants that binds with and neutralizes free radicals. NAC is the stable form of the amino acid L-Cysteine and works to stabilize the formation of protein structures, which supports cellular health. DELIVERS 600MG OF ACETYL CYSTEINE - NAC has earned a reputation as a free radical scavenger due to its ability to promote glutathione preservation, which helps prevent oxidative damage while also having an antiaging effect. TERRIFIC DETOX SUPPORT - The thiol groups within NAC help to fight against toxins or environmental pollutants, and works to inactivate them. OUR QUALITY COMMITMENT: For nearly 50 years, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in our GMP certified facilities, and our purity and potency testing includes independent third-party labs. MONEY BACK GUARANTEE: At Swanson, we guarantee that every health product is made from the purest, freshest ingredients. If you aren't satisfied with any product(s) purchased within the last 30 days, return the unused portion to us for a full refund.