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NOW Foods Nac-Acetyl Cysteine 600mg, 250 Vcaps

from Now Foods
547 customer reviews
| 21 answered questions

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  • NOW Foods Nac-Acetyl Cysteine 600mg, 250 Vcaps
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About the Product

  • Free Radical Protection
  • With Selenium & Molybdenum
  • Maintains Cellular Health
  • Consult your doctor before usage as it might cause side effects
  • Contains no sugar, salt, yeast, wheat, gluten, soy, milk, egg or shellfish


Frequently Bought Together

NOW Foods Nac-Acetyl Cysteine 600mg, 250 Vcaps + NOW Foods Alpha Lipoic Acid 250mg, 120 Vcaps
Price for both: $36.20

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Product Description

Size: 250

N-Acetyl Cysteine (NAC) is a stable form of the non-essential amino acid L-Cysteine.  It is a sulfur-containing amino acid that acts as a stabilizer for the formation of protein structures, and is also necessary for the formation of Glutathione.  Molybdenum and Selenium are essential trace minerals that facilitate the production of several important enzymes.*

Product Details

Size: 250
  • Product Dimensions: 6 x 5 x 4 inches ; 9.1 ounces
  • Shipping Weight: 8 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Origin: USA
  • ASIN: B0013OUQ3S
  • UPC: 885182973997 733739000866 885123031793
  • California residents: Click here for Proposition 65 warning.
  • Item model number: 86
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (547 customer reviews)
  • Amazon Best Sellers Rank: #372 in Health & Personal Care (See Top 100 in Health & Personal Care)
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Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below.

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

115 of 121 people found the following review helpful By Douglas Chappee on February 23, 2013
Size: 250 Verified Purchase
I have pulmonary fibrosis. My pulmonologisit suggested using these. It definitely helps. I would recommend anyone with lung problems and congestion to take this product.
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Size: 250 Verified Purchase
To test this supplement I conducted an experiment on myself. Over the course of a month I had my girlfriend lay out my pills and write down which days included NAC and which days did not. I did not look at my pills when I took them and did not know which days I was taking NAC. I then recorded my anxiety and stress levels each day. At the end of the month there was a noticeable difference in my ratings of anxiety between days that I did and did not take NAC.

I therefore believe that, for me personally, this supplement appears to be effective. JUST MAKE SURE TO NOT TAKE IT AT LEAST 2 DAYS A WEEK! The reasoning behind this is that NAC increases your body's glutathione levels. But if your levels are chronically elevated, your body may begin to decrease glutathione levels in order to keep them at a consistent level (this is called homeostasis). Therefore (as with all antioxidant supplements) you want to stop taking it at least 2 days a week so your body does not decrease glutathione production.
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353 of 388 people found the following review helpful By Brigitte F. Tolson on December 19, 2013
Size: 250
A friend with depression told me NAC worked wonders for her depression, so initially I ordered some thinking it may be a good mood elevator. It sad in my cabinet, and I'd take it inconsistently with no real noticeable effects.

Flash forward a couple months, I hear about glutathione as an amazing anti aging supplement from my dermatologist (glutathione is an essential part of every cell in the human body, it's considered the "ultimate antioxidant": [...] and upon doing research on the best way to encourage glutathione...my friend NAC kept popping up again. Time to take this stuff properly (I take 3 a day) and consistently.

Bare in mind, I have tried virtually every vitamin, herb, amino acid, you name it. After a brush with health problems last year, I have become a bit of a wellness junkie: and from adding martial arts, acupuncture, vitamins, research, juicing, and all that good stuff, I can tell you no supplement or food, absolutely NOTHING has improved my overall health more than NAC. I truly feel younger, I get deeper sleep, I get out of bed after 7-8 hours feeling rested (I used to need about 9-10). I maintain a healthy weight more easily, my skin is better, I feel happier, I no longer get sick, I feel more clear-headed. It has truly made an impact in my life similar to adding in a workout routine really, it's absolutely incredible. I suspect that increased glutathione was a key part of feeling much better. My thyroid is also functioning better according to lab tests, and I can feel it as well.
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92 of 98 people found the following review helpful By J. Caldwell on February 4, 2014
Size: 250 Verified Purchase
Both my kids have, for years, had problems waking up with allergies, sniffing etc.I researched the web and was hearing that this product helped with that. After using this product (1 cap) per day for about a week, neither has the morning allergy problems anymore. I don't know why it worked but it did.
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130 of 143 people found the following review helpful By pinonchick on April 23, 2013
Size: 250 Verified Purchase
I was referred to this product in the Feb 2013 article in Scientific America on the Brain. This over six weeks has made a remarkable clarity in my word recall, memory, attention and more. I was really surprised. This value, for the count is the best as I shopped other online vitamin shops and stores.
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190 of 218 people found the following review helpful By Elder Statesman Doctor on January 16, 2014
Size: 250 Verified Purchase
I'm a physician, and I use one of these on any day I take either Tylenol or a motrin like product.

This same compound is used in an IV form in the ER to protect your liver from damage from an overdose of Tylenol, and it is used in at least some hospitals before during and after Cardiac Catheterizations to protect the kidneys from damage from the iodine dye used for visualizing the blood flow in the coronary arteries.
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60 of 66 people found the following review helpful By Anonymous on January 25, 2015
Size: 250 Verified Purchase
As a med student and pharmacology freak, I was very skeptical about this product, but was also very desperate to stop with compulsive nail biting, skin picking, and pen chewing. After consulting my doctor, we determined there were no drug interactions to worry about, and for the price decided it was worth a shot. The first 2-3 months seemed to pass uneventfully and I started taking one 600mg in the am, one 600mg around 4pm on autopilot even though I wasn't noticing any effects and had already pretty much dismissed nAC as a placebo. But then I realized a few weeks ago that all ten of my fingernails needed trimming! (It sounds absurd, but if you're a nail-biter, you'll understand the significance of something like this). When I looked back, I realized that other compulsive behaviors had also waned; newer-onset ones, like pen chewing and pen twirling, disappeared within the first month or so, obsessive worry over things like a zit or a small stain on a shirt during the day disappeared over the next couple of months, and the nail-biting/skin-picking finally disappeared around 4-5 months.
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24 of 25 people found the following review helpful By Brandy K. on February 21, 2015
Size: 250
I took this to help with PCOS (combined with inositol) to regulate my cycles and improve fertility. Inositol worked immediately for getting my cycles down to a fairly normal range (~30-33 days). After about 6 months of that, I added NAC. NAC got them down to 28, improved cervical mucus, and made my period a lot less painful. I started it a week into my cycle, had a 28 day period, then got pregnant my next cycle (after 18 months trying). I am sure NAC is what did the trick. Wish I would have tried it sooner! I tried all the herbal stuff and none of that worked (and sometimes seemed to make things worse).
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Want to discover more products? Check out this page to see more: free amino acids

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