Rated 4.7 (258)
NAC Lung Supplement 600mg
The Correct Dose
Clincally dosed to reduce COPD exacerbations. Tested and made in the USA.
No More Flare Ups
Take With Any Meal
Third-Party Tested
90 Day hassle free returns
Free Shipping Over $40
I've been taking it for 2 months. Easy to swallow and I like that they show the lab report! Feel confident about what I'm putting in my body
SELLING OUT FAST
Correctly Dosed NAC Isn't Easy To Find
72% SOLD
CLINICALLY PROVEN TO SUPPORT
- Clears Mucus
- Reduces Oxidation
- Cell Protection
- Easier Breathing
- Antioxidant Boost
- Lung Support
Studied In People With COPD
The HIACE trial followed 120 people with stable COPD for one year. Here's what it found.
Studied In People With COPD
The HIACE trial followed 120 people with stable COPD for one year. Here's what it found.
Fewer Flare-Ups
High-risk patients were more than twice as likely to stay exacerbation-free for a full year, compared with placebo.
Fewer Hospital Visits
High-risk patients on NAC were less likely to need hospital treatment for a flare-up over the course of the year.
Improved Airflow
Small airway function markers improved significantly over the 12-month HIACE study, based on standard breathing tests.
Studied, Not Promised
Real results from a 1-year trial. We show the result, most brands won't.
The Proof, In Numbers
The Proof, In Numbers
0%
Stayed Flare Free
of high-risk patients had no exacerbations for a full year, vs 24% on placebo.
0x
More Protected
more likely to stay flare-up free over 12 months, compared with placebo
0
Months Studied
a full year of randomized, placebo-controlled data on high-dose NAC.
HIACE trial: 120 COPD patients, 1-year placebo-controlled study (CHEST, 2013). 51%/24% reflects a high-risk subgroup, not all participants. NAC does not treat COPD or any condition.
Here's Why The Right Doage Matters
Learn more about what makes our products and services unique.
Two Doses, Not One Big One.
NAC only stays active in your body for about 6 to 8 hours. A single 1200mg dose gives you one short burst, then nothing for the rest of the day. Splitting it into two 600mg doses keeps NAC working in your system around the clock instead of in one brief spike.
Key Benefits
- Matches the exact protocol used in published research
- Keeps NAC active in your body all day not just a few hours
- Easier on your stomach than one large dose
Formulated for Your Body to Actually Use.
N-Acetyl Cysteine is the stable, more absorbable form of cysteine, the amino acid your body needs to build glutathione. We use the same pharmaceutical-grade form of NAC used in clinical research, not a cheaper raw substitute.
Key Benefits
- Improves user experience
- Saves time and effort
- Provides excellent value
Third-Party Tested, Every Batch.
Every batch is verified by an independent lab for potency and purity before it ships. What's on the label is what's actually in the capsule.
Key Benefits
- Easy to use interface
- Professional results
- Great customer support
The Same Dose Used in Clinical Research.
Most supplements pick a dose that just sounds good on a label. Ours matches the 600mg twice-daily protocol used in the HIACE trial, a full year, placebo-controlled study in people with COPD.
Real People Real Results
See what our customers are saying about our products
Linda C.,
30
Verified Buyer
After 18 months of feeling like a stranger in my own body, I just wanted ONE thing that was honest. The flare ups stopping was the first thing I noticed. I take it twice daily like the study says.
FormaB - NAC Lung supplemet 600mg
$34.99
Purchased on August 28th, 2026
Charlize B.,
49
Verified Buyer
I have a drawer filled with half finished bottles that did nothing, so I went in skeptical. What kept me on it was they tell you the real amount and send it to a lab for testing. Around week 4 I was running around with my grandson at the park again. Only 4 stars because I wish it was cheaper.
FormaB - NAC Lung supplemet 600mg
$34.99
Purchased on April 28th, 2026
Diana. M,
53
Verified Buyer
I am usually the first to call this stuff marketiing. What sold me was the lab report right on the page. By week three I could run up the stairs with no problem. It is the first supplement in years I actually kept taking
FormaB - NAC Lung supplemet 600mg
$34.99
Purchased on July 20th, 2025
Michelle C,
59
Verified Buyer
Ever since I was diagnosed a year ago with COPD, I went downhill, I stopped walking or doing any type of physical work because I was scared that I would stop breathing. Now eight months later, I can play with my grandson at the park again.
FormaB - NAC Lung supplemet 600mg
$34.99
Purchased on March 14th, 2025
Jessica,
42
Verified Buyer
My husband said Watching someone you love basically smother or cough to the point of not being able to catch their breathing is horrifying. That's when I decided to look into this study and start taking NAC. He says I've been acting like myself lately.
FormaB - NAC Lung supplemet 600mg
$34.99
Purchased on May 2nd, 2026
Frequently Asked Questions
Find answers to common questions about our products, shipping, returns, and more.
How long should I take FormaB before deciding if it’s working?
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NAC isn’t designed to be an overnight fix. Consistency matters, which is why FormaB provides a full 90-day supply and is designed to be taken as one 600mg capsule in the morning and one in the evening. Individual experiences vary, so we recommend following the protocol consistently rather than judging it after only a few days.
What makes FormaB different from a typical “lung support” supplement?
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FormaB isn’t a proprietary blend filled with a long list of ingredients at unclear doses. Each capsule provides 600mg of NAC, with a simple twice-daily protocol: one capsule in the morning and one in the evening. You know exactly what you’re taking, how much you’re getting, and FormaB is third-party tested for additional transparency.
Why 600mg twice a day, not one bigger dose?
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NAC only stays active in your body for 6 to 8 hours. Splitting the dose keeps it working around the clock. Studies using 1200mg once a day didn't show the same results as 600mg twice daily.
Isn't NAC banned by the FDA?
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No. In 2022, the FDA issued formal guidance confirming NAC supplements can continue to be sold while it reviews a technical classification issue dating back to a 1963 drug approval. NAC has been sold as a supplement for over 30 years and remains legal and widely available today.
I've taken NAC before and felt nothing?
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NAC's benefits build over time, not in a single dose. In the HIACE trial, meaningful improvements in flare-up frequency didn't show up until months into consistent daily use, not day one.
Is it safe to take with my medications?
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NAC can interact with certain medications, including nitroglycerin and some blood thinners. If you're on prescription medication, talk to your doctor before starting, same as with any supplement.
Why is it cheaper than other lung support brands?
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We're not paying for proprietary blends, trendy packaging, or inflated "clinical strength" markups. You're paying for 600mg of real NAC per capsule, tested and dosed to match published research, nothing more.
What to Expect Week by Week
NAC isn't a switch you flip. Here's the honest arc when you take it daily.
Weeks 1-2
GETTING IT IN
You start taking 600mg twice a day, morning and evening, with or without food. Most people don't notice a dramatic shift yet, this phase is about building the habit and letting NAC establish itself in your system.
Weeks 3-6
THE FIRST SHIFT
Some people start noticing slightly easier breathing or less chest tightness during normal activity. It's subtle at this stage, but it's often the first sign your body is responding.
Months 2-4
Building Protection
This is the window where the HIACE trial began seeing measurable improvements in small airway function. With consistent daily use, this is when the real physiological changes tend to show up, not just how you feel day to day.
Months 6-12
THE NEW NORMAL
This is the timeframe where the study saw its biggest results: high-risk patients were significantly more likely to stay flare-up free for the full year. Consistency is the whole point, the protection holds as long as the daily habit does.
Reviewed By Our Advisor
Dr. Meghan Westwood
MD • FormaB Scientific Advisor
Most people who say NAC 'did nothing' stopped before it had a chance to work. NAC only stays active in your body for 6 to 8 hours. Taken once a day, most of it wears off before it can build up. Split into two daily doses and given a few months, the picture changes."
"What drew me to FormaB was the dosing, matched exactly to the clinical trial, 600mg twice daily, not some arbitrary bigger number picked for the label. That kind of transparency is rare in this category, and it's the standard I'd want for anyone in my own family
Try It for 90-Days. Risk-Free
Give it a real, honest run. If you don't feel more like yourself within 90 days, send back the bottle — even if it's empty — and we'll refund every penny. No forms to fight, no questions that make you feel foolish.
ADD TO CART
Full Refund, Even If Empty
No-Hassle Returns
Third-Party Tested
Try It for 90-Days. Risk-Free
Give it a real, honest run. If you don't feel more like yourself within 90 days, send back the bottle — even if it's empty — and we'll refund every penny. No forms to fight, no questions that make you feel foolish.
ADD TO CART
Full Refund, Even If Empty
No-Hassle Returns
Third-Party Tested
