If you’ve noticed a strong odor when opening your Longevity supplement, you’re not alone! Many customers are surprised at first, but the smell is actually a completely normal and expected characteristic of N-Acetyl Cysteine (NAC)—one of the key ingredients in the formula.
Here’s why:
NAC is a sulfur-containing compound derived from the amino acid cysteine. Sulfur is what gives foods like garlic, onions, and eggs their distinctive smell. That same chemistry is at play here.
The smell may be most noticeable when the bottle is first opened. This is normal and expected. If you’ve taken supplements like fish oil or B vitamins before, you’ll know that natural nutrients sometimes come with natural odors.
In fact, the odor is often considered a hallmark of genuine NAC. If your supplement has that distinct scent, it’s a good sign you’re getting the real thing.
The smell is not a sign of spoilage or rancidity. NAC remains chemically stable throughout its shelf life, and the odor has no impact on its effectiveness or safety.
Tip: To minimize smell, close the cap tightly and store the bottle in a cool dry, place.
We know smell is part of your overall experience with a supplement, and we take that seriously. Our team is actively exploring new ways to reduce the natural odor of NAC in future production runs—while making sure we never compromise on the quality, purity, or effectiveness of Longevity. We’re committed to making your experience the best it can be.
If you have any additional questions or concerns, please contact us. We are always happy to help!