NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
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Availability:
Only 3 left in stock, order soon!
Arrives
Tuesday, Apr 14
Size: 250 Count (Pack of 1)
Style: Supplements
Features
- FREE RADICAL PROTECTION*: Take 1 NAC capsule with selenium twice daily for free radical protection and to maintain cellular health*
- IMPORTANT NOTE ABOUT THIS PRODUCT: Black spots may appear in NAC because of a normal oxidative reaction, but product is safe to consume. These spots are NOT mold or any other micro-contamination. Micro-testing has been performed to assess product safety
- CERTIFICATIONS/CLASSIFICATIONS: Non-GMO, Made without Gluten, Kosher, Dairy Free, Egg Free, Nut Free, Soy Free,
- GMP Quality Assured: A-rated, third-party certification means that every aspect of the NOW manufacturing process has been examined. Our in-house laboratories are ISO/IEC accredited for laboratory testing including for stability, potency and product formulation.
- Founded in 1968 by Elwood Richard, NOW is one of the largest independent, family- and employee-owned manufacturers of natural products
Description
Maintains Cellular Health With Selenium N-acetyl cysteine (NAC) is a stable form of the non-essential amino acid 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. Selenium is an essential trace mineral that facilitates the production of several important enzymes.
Is Discontinued By Manufacturer : No
Product Dimensions : 2.81 x 2.81 x 5.13 inches; 8.47 ounces
Item model number : 0086
Department : Health and Beauty>Health and Wellness
Date First Available : October 2, 2001
Manufacturer : NOW Sports - Nutrition and Wellness
Best Sellers Rank: #795 in Health & Household (See Top 100 in Health & Household) #14 in Amino Acid Nutritional Supplements #85 in Sales & Deals
#14 in Amino Acid Nutritional Supplements:
#85 in Sales & Deals:
Brand Name: NOW Foods
Primary Supplement Type: N-Acetyl Cysteine
Item Form: Capsule
Diet Type: Halal, Kosher
Product Benefits: Antioxidant
Age Range Description: Adult
Container Type: Bottle
Dosage Form: Capsule
Model Name: NAC (N-Acetyl Cysteine) 600 mg with Selenium
UPC: 733739000866
Manufacturer: NOW Sports - Nutrition and Wellness
Global Trade Identification Number: 66
Manufacturer Part Number: 0086
Model Number: 0086
Unit Count: 250 Count
Item Weight: 0.24 Kilograms
Item Dimensions: 2.81 x 2.81 x 5.13 inches
Number of Items: 1
Total Servings Per Container: 250
Flavor: Unflavored
Special Ingredients: NAC
Material Features: Vegetarian
Material Type Free: egg free,gmo free,soy free,wheat free,gluten free
Specific Uses For Product: Free Radical Scavenger*
Allergen Information: Dairy Free, Egg Free, Non-GMO, Nut Free, Soy Free
Color: Off White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Apr 14
This item is non-returnable:
Non-returnable due to Food safety reasons
View our full returns policy here.
Non-returnable due to Food safety reasons
View our full returns policy here.
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Top Amazon Reviews
Size: 250 Count (Pack of 1)
Style: Supplements
This is a great product from a great brand. There is no smell or taste, and the pills are super easy to swallow. They are effective at breaking up biofilms, and NAC is such a beneficial supplement. I also love the added selenium. The size of the bottle is great, and this brand never fails to impress me with quality and amazing prices.
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Reviewed in the United States on February 10, 2026 by Ellie D.
Size: 250 Count (Pack of 1)
Style: Supplements
*Overview* In a few words, I can say that this supplement is the closest supplement I've ever used to a miracle product. Why do I say that? As a precursor to glutathione (Coined “The Mother of All Antioxidants” by Mark Hyman, MD), NAC serves to help my body overcome environmental and dietary toxins. In brief, I no longer feel "sluggish" like I once did or experience hangovers (even from minimal alcohol) like I once did. Since taking 1200-1800mg/day (2-3 capsules) in September of 2015, this has become a (long-awaited) staple in my supplement drawer and boost to my overall health. I am never without this product. *Dosage* I take, like I said, 2-3 capsules a day. First thing in the morning on an empty stomach with a large glass of water. Second one around lunchtime. Third one middle of the afternoon or so. If I plan on going out for a few drinks in the evening, I take another one before heading out the door to spend time with friends. I rarely miss doses but if I do, it is not as if my whole system crashes or I feel I have become so dependent on it I cannot function or am worse off than when I started. *What does it do?* If you're interested in the breakdown of what exactly this product is meant to do, I would recommend your own research or read some of the other reviews. I merely want to offer my own experience. I have taken a variety of supplements since I was a teenager (15+ years) and never really felt that most products lived up the hype or could back up their claims. As a former smoker, I stumbled across this product while researching "What products help mitigate lung damage from smoking" and found this on a random forum buried somewhere in the text. That's where I first encountered the name NAC. I was skeptical and more than a little nervous about taking it but was somewhat assured when I read this is used in hospitals for acetaminophen overdoses so, if used by the medical community, maybe there was something to it? The effect was initially subtle. I was bursting with energy or bouncing off walls but found certain things that used to be VERY hard for me started to lift. A few examples. I found myself picking up the phone more often and calling a friend where before I felt a dark lining on life that made it harder to be myself. I found myself breathing easier and experiencing less sinus pressure (which makes sense as this thins out mucus) which was hugely helpful as I am allergic to most everything and experience an overload. It didn't take all allergy symptoms away, but my need for anti-allergy meds has decreased. In fact, I can't remember the last time I bought a bottle of allegra. I found myself able to better focus in class and while I still experience a certain level of brain fog from time to time, clarity of thought is more the norm for me than the exception. This has corresponded to a lifting of a sense of depression and darkness making it easier to be myself in social situations (and move past the worst parts of social anxiety). Last, but certainly not least, I process alcohol WAY faster. I can't explain the effect but, like most adults, I have a drink from time to time. Like some adults, I have nights where I have more than one drink from time to time. Unlike most adults after a night of drinking, I don't have concerns for how I'll feel the next day. I can feel the effect even at the bar where I remain lucid and focused while drinking as opposed to becoming...sloppy? In the last year I've woken up with a headache once as opposed to formerly experiencing a headache after 1 beer. So...it seems to be doing something... Like I said, I cannot recommend this product enough and continue to share my experience with everyone I encounter. While I continue to experiment with other supplements, adding or removing items for specific things, NAC remains a baseline of health for me and will not go without. No, my hair has not fallen out (as another reviewer mentioned they experienced). No, this product will not allow you to drink like a monster without effect at all. Qualifiers aside, this product might help you and would be worth considering if you've tried everything out there (like me) and want a good baseline for health to continue to build upon. Best of luck in your search for better health! *edited 10/06/16 for clarity.*
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Reviewed in the United States on July 4, 2016 by Kevin James
Size: 250 Count (Pack of 1)
Style: Supplements
Keeps me staying healthy and with my liver disease works well for me and my wife been taking it for years
Reviewed in the United States on February 24, 2026 by IN FULL EFFECT
Size: 250 Count (Pack of 1)
Style: Supplements
You can’t go wrong with items from NOW and these NAC supplements didn't disappoint — easy to swallow.
Reviewed in the United States on March 23, 2026 by Dr. Arias
Size: 250 Count (Pack of 1)
Style: Supplements
I started using this 2 months ago my main reason was to help with endometriosis. I heard from a few bloggers that it can help with the pain and irregularities of your period when you take it. The first month went by and to my surprise my period pain was cut in half. Still painful but not as bad as without it not to mention my period came on time. If you have endo you know that the period pain can last very long sometimes the whole period. This past period my pain lasted 4 hours then the rest was a breeze compared to what im used to. In addition my children caught the flu im usually the first one to get their germs but this time i had no symptoms i didnt even get sick. Plus before i started taking nac i was using the pill to help with pain but i hated how emotional i was. This also got rid of anything left in my body from the pill and everyday i felt more like my non emotional self! After 2 months of taking it i can surly say its a maricle pill it did what i wanted it to do and more!!! The reason i am giving this a 4 is because 2 days ago I noticed that now when i took it i had the worst tummy ache ever for a few hours. Then i checked the bottle and noticed little blackish spots on the pills so i had to throw it out (i kept the little fresh package inside the bottle and kept it in a dry place!) so i am currently seaching for another brand since the past reviews mention this as well.
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Reviewed in the United States on February 19, 2019 by Chantel
Size: 100 Count (Pack of 1)
Style: Supplements
Look, I'm not going to pretend NAC is some miracle supplement that changed my life overnight. Been taking this daily for about six weeks, and honestly? It just works. No drama, no fuss. The capsules go down easy, my stomach doesn't hate me for it, and here's the kicker - they threw in selenium. Why does that matter? Because NAC can actually deplete your selenium over time, and most people don't know that. So NOW Foods basically did your homework for you. That's the kind of attention to detail I appreciate. Fair warning: when you crack open the bottle, you'll get a whiff of that signature sulfur smell. It's not pleasant, but it's also not a deal-breaker. The capsules themselves don't taste like anything, so once you get past the initial "what died in here" moment, you're fine. Bottom line: if you're looking for a straightforward NAC supplement that doesn't require you to buy three other things to make it work properly, this is it. Good price, solid brand, does what it says on the tin. Skip it if you're expecting some kind of immediate transformation or if sulfur smells make you queasy.
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Reviewed in the United States on December 15, 2025 by Nick Y.
Size: 250 Count (Pack of 1)
Style: Supplements
I try lots of different supplements, seeing which things give me noticeable benefits. Lots of things come and most of them eventually go, but I always keep NAC in rotation. There's a noticeable difference in my mood and mental clarity, among other things. Pills are scentless and easy to swallow.
Reviewed in the United States on March 25, 2026 by Jake