Save to favorites
This feature is restricted to active members.
Join now to save favorites and get all member benefits, including over 1,400 product reviews.
Join NowAlready a member? Sign in here.
Our Members Asked:
If I buy NAC as a loose powder in a large bag, as opposed to in tablet or capsule form, will it spoil? I've heard it can spoil or degrade into a harmful by-product.
Answer:
NAC (N-Acetyl-Cysteine) powder can be stored in a closed container at room temperature (away from high heat or humidity) for at least two months, and possibly longer, without spoiling or degrading. Small amounts of NAC may degrade, over longer periods of time, into a by-product called di-NAC — however, this substance is not known to be harmful. The sulfur in NAC may cause a slight "rotten egg" odor if some of the NAC oxidizes, but this does not indicate a significant loss of NAC. If you are concerned about degradation, consider capsules or tablets, as they are likely to be more stable than powder.
See ConsumerLab's NAC (N-Acetyl-Cysteine) Supplements Review for details, as well as our tests of popular NAC supplements, our Top Picks, and the FDA's latest position on NAC.
Join the conversation
Loading Comments…
Submit your comment
This feature is restricted to active members.
Join now to add comments and get all member benefits, including over 1,400 product reviews.
Join NowAlready a member? Sign in here.
Agree to Comment Terms
Please abide by the following:
- If you make a statement of fact, such as whether a type of treatment does or does not work, state your basis -- such as personal experience or a published study.
- If you make a positive or negative comment about a product, note whether or not you have a financial interest in the product or in a competing product.
- Please be respectful in your tone.
- Please do not submit any type of HTML markup or scripting as it will not be accepted, nor will posts that exceed 2,500 characters.
For your privacy, only your first name (from your account) followed by a random number will appear with your comment. Your last name and email address will not be displayed.
Your comment has been submitted
We will review your comment before it is posted.
Join today to unlock all member benefits including full access to all CL Answers and over 1,400 product reviews.
Join NowAlready a member? Sign In Here.
Join now at www.consumerlab.com/join/
Join over 300,000 people on our weekly email list.
Related CL Answers (5)
Join over 100,000 members and access 1,400+ product reviews
Find the best products with instant access to our latest tests & reviews of over 1,400 health products.
Save money by finding high-quality products at lower cost.
Stay safe with the latest clinical findings, warnings, and expert answers.
Access our weekly newsletter.
