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- You earn loyalty credit for every order you place at iHerb!
- Loyalty credit is equal to 5% of the value of your order after discounts and credits applied, excluding shipping charges.
- Your loyalty credit will be applied towards your next order as soon as your current order has shipped.
- Your loyalty credits are valid for up to 90 days from the date of your last purchase.
The length of time for the expiration date or "best used before" date depends on the type of product, as well as the brand.
Perishable items (such as flax oils or certain probiotics) generally have shorter expiration dates. Although our warehouse is fully air-conditioned, these more fragile items are put in cold storage (freezer or refrigeration unit) for maximum freshness.
Our receiving department does its best to verify and then enter the correct expiration dates for all incoming products. However, discrepancies do occur from time to time. This being said, the exceptionally high turnover at iHerb ensures that our inventory is among the freshest in the industry.
Dietary Supplement
Convert Fat Into Energy
Purity & Potency Guaranteed
NAC (N-Acetyl-L-Cysteine) is a highly stable form of cysteine that provides antioxidant support and is especially beneficial for active people, the elderly and those exposed to polluted environments. Natural Factors amino acids are the highest quality pharmaceutical grade products available.
Manufactured by Natural Factors to ensure safety and potency in accordance with the Good Manufacturing Practices (GMP), of the FDA and Health Canada.
1 capsule, 2-3 times per day or as directed by a health professional.
Rice powder, vegetarian capsule (carbohydrate gum [cellulose], purified water), magnesium stearate (vegetable grade).
Contains no artificial preservatives, color or sweeteners; no corn, dairy, gluten, soy, starch, wheat or yeast. Suitable for vegetarians.
Although NAC's active sulfur is beneficial, some people sensitive to the sulfur may experience stomach irritation.
Keep out of reach of children.
Sealed for your protection. Do not use if seal is broken. For freshness, store in a cool, dry place.
| Supplement Facts | ||
| Serving Size: 1 Capsule | ||
| Amount Per Serving | %Daily Value | |
| N-Acetyl-L-Cysteine (Pharmaceutical Grade) | 500 mg | ** |
| ** Daily Value not established. | ||
Verified Purchase
Cysteine is a lipotropic element. It helps the liver function more efficiently to neutralize and eliminate toxins and wastes. Other lipotropics include methionine, choline, B6 and B12.
Posted by iHerb Customer on Sep 02, 2016 | Verified Purchase
This product 2 x per day, plus Tyrosine 2 x 500 mg per day, cured my almost daily headaches. Headaches that had been going on for years. I believe it was 1 of the 2 products, I just don't know which one. I started taking them for an entirely different reason. This product did dry my skin (I read this can be a side effect). I have to use extra moisturizer. Not a reason to stop taking it.
Posted by iHerb Customer on Feb 11, 2016 | Verified Purchase
Not the most bang for your buck but is definitely the real stuff and works as claimed!
Posted by iHerb Customer on Mar 29, 2014 | Verified Purchase
Natural Factors, N-Acetyl-L Cysteine, 500 mg, 90 Veggie Caps good and cheap
Posted by iHerb Customer on Mar 24, 2014 | Verified Purchase
I have used Twinlab's NAC just before this one and the difference is there undoubtedly. Natural Factors has a very strong (slightly unpleasant) smell which Twinlab doesn't have. Whenever I took NAC from Twinlab in the evening I would get a very good, resting sleep. This doesn't happen with Natural Factors's NAC. Plus my mind seemed clearer with Twinlab's product...not the same benefit wih this one. I wanted to same some money in shipping but ended up with I product I won't be using. My conclusion would be: try NAC, just not this particular brand as there are better ones out there. Don't know if Twinlab is one of the best, but to me it definitely felt better.
Posted by iHerb Customer on Mar 22, 2014 | Verified Purchase
My moods are substantially better on these and I am only taking one a day. am very pleased with them. Taking on an empty stomach requires some discipline!
