NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules | ⭐ Flexiology.Store Recommended
$47.99 Original price was: $47.99.$19.20Current price is: $19.20.
🌿 Expert Tip: Handpicked for natural health, wellness & beauty.
Price: $47.99 - $19.20
(as of Oct 01, 2025 17:39:13 UTC – Details)
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
ASIN : B0013OUQ3S
Best Sellers Rank: #792 in Health & Household (See Top 100 in Health & Household) #11 in Amino Acid Nutritional Supplements #101 in Sales & Deals
Customer Reviews: 4.6 4.6 out of 5 stars 18,952 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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.
Packaged in the USA by a family owned and operated company since 1968
Customers say
Customers find this nutritional supplement to be of high quality and effective, particularly noting its benefits for lung and liver function, immune system support, and antioxidant properties. Moreover, they consider it good value for money and appreciate its effectiveness. However, customers report mixed experiences with how it makes them feel, with some feeling better after taking it while others experience nausea. Additionally, several customers report issues with the product developing black and brown spots inside the capsules.
AI Generated from the text of customer reviews
🌿 Expert Tip: Selected by our Flexiology Experts for quality & value.
⚠️ Disclaimer: Information is for educational purposes and not a substitute for medical advice. Consult your physician before use. Flexiology.Store is not responsible for any adverse effects.
13 reviews for NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
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Tracy W. –
Great Supplement
Great price! It arrived earlier then expected. I would buy it again.
Kevin James –
Supercharge your liver and say “goodbye” to hangovers…
*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.*
Amazon Customer –
It helps with certain addictions like marijuana and porn.
If you try smoking marijuana while you’re on a high dosage of this, you’re not even gonna feel that high. It works perfectly for dulling that feeling of wanting to keep on smoking for me. And it’s a tool that I use to help me quit. Think of it like naltrexone, but for weed. I will say it’s not a one hundred percent cure. Like if you keep on smoking eventually you will get high. But from what I noticed, you’re going to have to be smoking for a long time. It really just dulls the enjoyment of compulsive activities. Even if you like cranking the ham, you’ll notice that it’s not that fun Anymore. This is a really powerful tool for aiding in controlling what seems like certain pathological urges. Just to be clear, you can still get high on it. It’s just not going to be all that fun, you’re going to be sitting there, wondering, “are my drugs working?” For a couple to a few hours. Until it wears off. If you’re really addicted, you’ll start fighting the necessity to take the nac Don’t do that. You want to dull whatever reward sensation smoking gives you and this helps do that. Also, this stuff is very protective of the liver, which is good. If you’re like me and still can partake in drinking responsibly. And I don’t use the word responsibly lightly.
David Armstrong –
No side effects
Works well and keeps chest free of mucus and makes easier to breathe
KCSP20489 –
A Solid Choice, With One Small Quirk
I’ve been taking NAC for general wellness and antioxidant support for the better part of a year, and I decided to try this NOW brand bottle because the value is just fantastic for a 250-count. I’ve always trusted NOW for quality, and this product is no exception. The capsules are a standard size, easy enough to swallow, and have no aftertaste, which I appreciate. I genuinely feel they contribute to my overall respiratory health, especially during seasonal changes. The only reason I’m docking one star is the issue with speckling. After having the bottle for a month or two, I noticed some of the capsules started to get small, dark spots on them. After a bit of reading, it seems this is just oxidation and isn’t harmful, but it can be a little off-putting to see your supplements changing color. It hasn’t stopped me from taking them, but it’s something to be aware of. I’ll likely buy them again, but I might try storing them in the fridge next time to see if it helps.
JSK –
So happy I found this!
This has been a miracle supplement for my 7 year old son. I originally purchased it because I had read it can help with nose picking which my son was doing pretty constantly and claimed he couldn’t help it. He’s been taking one pill a day and over the course of a few weeks, I have definitely seen a difference in the picking. Even better, his whole attitude is so much more positive! This somehow has made him happier and nicer. I didn’t anticipate any of that, but it’s been a wonderful surprise.I should note that he really doesn’t like the taste and isn’t able to swallow pills yet so I break a capsule in half, pour the supplement on a spoon and cover it with applesauce. This seems to cut the taste for him.
Taryn T. –
A Health Essential in Our Household
This supplement came highly recommended by our healthcare provider, and it’s become a daily must-have for our family. I appreciate the transparency and quality of the NOW brand. Since starting it, I’ve noticed a difference in my overall respiratory health and immune resilience. Capsules are easy to take and gentle on the stomach. Reliable, trustworthy, and effective.
Mark L. –
If you had to choose one ..
This is replacing my multivitamin from now forward. It does so much for the body, why spend more money.I’m starting pair back on my supplement list, as it’s getting out of hand. NAC is one I’m keeping.
Bas Qayed –
NAC is the best. It has helped balance my dopamine levels, changes my skin color, my blood vessels appear large and more elastic, and I feel really good while I’m on it. I didn’t realize how good this stuff is until I tried it a few months ago, then noticing the difference off and on the stuff. It also makes me feel very calm. I love it! It’s amazing.
Zelly Rodz –
Muy buen producto. Ayuda a prevenir los olvidos y la mala memoria. Da estabilidad a la mente y al comportamiento. Los resultados se ven en dos semanas de tomarla diaria mente.
Carol F –
works well
Alicia S. –
Excelente producto, me fortaleció los pulmones, no lo dejo de tomar desde hace poco más de 8 meses
lightheart –
NAC is needed to cleanse liver , help build more glutathione, thin out the mucus and reduce pores on face .I have been buying this for many years and would keep buying it ..now brand NAC comes with selenium and molybdenum, NAC is known to deplete molybdenum from the body hence it’s addition counters the effect ..