NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
Condition: New
Buy Now, Pay Later
As low as
$5
/ mo
Learn more
- – 4-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
Non-returnable item
Learn more
Non-returnable due to Food safety reasons
View our full returns policy here.
Availability:
Only 3 left in stock, order soon!
Arrives
Tuesday, Sep 2
Recently Viewed
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.
- Packaged in the USA by a family owned and operated company since 1968
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.
Brand: NOW Foods
Flavor: Unflavored
Primary Supplement Type: Selenium
Unit Count: 250 Count
Item Form: Capsule
Item Weight: 0.24 Kilograms
Item dimensions L x W x H: 2.81 x 2.81 x 5.13 inches
Special Ingredients: NAC
Diet Type: Gluten Free, Kosher, Vegan
Product Benefits: Antioxidant
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: #1,773 in Health & Household (See Top 100 in Health & Household) #25 in Amino Acid Nutritional Supplements #251 in Sales & Deals
#25 in Amino Acid Nutritional Supplements:
#251 in Sales & Deals:
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 2
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Size: 250 Count (Pack of 1)
Style: Supplements
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.
...
show more
Reviewed in the United States on June 25, 2025 by Taryn T.
Size: 250 Count (Pack of 1)
Style: Supplements
Works well and keeps chest free of mucus and makes easier to breathe
Reviewed in the United States on August 19, 2025 by David Armstrong
Size: 250 Count (Pack of 1)
Style: Supplements
NAC IS ONE OF THE BEST SUPPLEMENTS I EVER HAD READ UP ON IT TALK TO YOUR DR. AS TONY THE TIGER SAYS IT'S GREAT
Reviewed in the United States on August 8, 2025 by G MONEY
Size: 250 Count (Pack of 1)
Style: Supplements
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.
...
show more
Reviewed in the United States on August 8, 2025 by KCSP20489
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.*
...
show more
Reviewed in the United States on July 4, 2016 by Kevin James
Size: 250 Count (Pack of 1)
Style: Supplements
There are certain essentials in the realm of well-being—those quiet sentinels that work tirelessly behind the scenes. NOW Supplements’ NAC (N-Acetyl Cysteine) with Selenium is one such guardian, a potent ally in the art of resilience. From the moment it arrived, packaged with care and efficiency, I knew I had chosen wisely. Each capsule holds 600mg of NAC, a revered precursor to glutathione, the body’s master antioxidant. Paired with selenium, a trace element that fortifies cellular defense, this formulation is nothing short of an elixir for protection, detoxification, and balance. The 250-count supply ensures longevity, a comforting presence in my daily regimen. With its vegan-friendly composition, free from unnecessary additives, it upholds the purity that every supplement should embody. If wellness is a tapestry woven from intention, this is a thread worth holding onto—a silent guardian in a world that demands strength, clarity, and unwavering vitality. A staple for those who honor the body as a temple of resilience.
...
show more
Reviewed in the United States on March 4, 2025 by Luna St. James
Size: 250 Count (Pack of 1)
Style: Supplements
The taste of these is not overwhelming unlike Walgreens's version. Overall, it digests well. Still makes my farts smell awful though
Reviewed in the United States on August 20, 2025 by Noah Lisowski
Size: 250 Count (Pack of 1)
Style: Supplements
NAC helps create and replenish glutathione, a great antioxidant which is indispensable for better health especially as it's declines with age. I trust the "NOW" brand as a quality supplement for NAC (N-Acetyl Cysteine). Moisture can cause some brown dots or discoloration in the capsules (they're still safe to take though) but keep the NAC capsules frozen for optimal freshness and this won't occur.
...
show more
Reviewed in the United States on June 3, 2025 by RoadReady