GummyTalk Forum

Hey everyone, just spotted NAC supplements at Costco for way cheaper than I usually see online or at my local health store. Like, half the price. Has anyone tried these? Is the lower price a red flag for lower quality, or did I just find a killer deal? Worried it might be diluted or something.

OP, first thing I'd check is whether it's vegan-certified! Some cheaper brands use gelatin capsules (animal-derived, ugh). If it's plant-based and third-party tested, could be a steal. Costco sometimes has great bulk deals on clean supplements. Let us know the brand!

Price doesn't always equal quality, but watch out for fillers. Cheap versions might add maltodextrin or sugars that'll kick you out of ketosis. I stick to brands that are keto-friendly and transparent about ingredients. If the Costco one has a clean label, go for it—NAC's great for liver support on high-fat diets.

Omg I love NAC for antioxidant support!! I've bought the Costco brand before and it worked fine for me—no issues. Sometimes sales are just sales, you know? But yeah, compare the mg per serving and if it has any certifications (like USP). If it's similar to my usual brand, totally a steal! My yoga crew swears by it for respiratory health too.

Statistically, price correlates weakly with purity in supplements unless it's an extreme outlier. Check for third-party testing (e.g., NSF, ConsumerLab) on the label—that's more reliable than cost. NAC is generally stable, but cheaper versions might have lower bioavailability if they use inferior forms. Look for 'N-acetylcysteine' specifically and avoid proprietary blends. Costco's Kirkland brand often tests well in studies.