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“Helped a lot by helping clear out excess mucus” Terrance S. “A good product by all standards” ALICE A. “It seem to be helping in all aspects” Kevin “So far so good” Brenda C.
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5.0 972,661+ Happy Customers

Support Lungs and Liver with NAC (600mg)

Antioxidant Defense, Respiratory Comfort & Liver Support
Antioxidant Defense
Respiratory Comfort
Liver Support
Made in the USA
Third-Party Tested
90-Day Guarantee
Delivered by Aug. 27–29 🇺🇸 Fast US Shipping
Trusted by 972,661+ Americans Made in the USA. Veteran-owned.
90-Day Guarantee

We offer a 90-day money-back guarantee.

If you don't feel the difference, we'll issue a full refund — no questions asked. Simply reach out to our support team.

The Science Behind It

NAC (N-acetyl cysteine) is the direct precursor to glutathione — your body’s master antioxidant. Taking NAC is how you give your cells the raw material to make more of it.

NAC is also well known for supporting clear, comfortable breathing — it helps thin and loosen mucus — and for supporting the liver’s natural defense work.

NAC builds your antioxidant reserve with daily use — give it 2–4 weeks of consistency.*

How to Take

Take 1 capsule daily. NAC absorbs well on an empty stomach, but with food is fine if you prefer.

One small capsule, once a day, every day — that's the whole routine.

Shipping & Returns

We offer tracked shipping on all orders, processed within 24 business hours on weekdays.

U.S. orders typically arrive in 3–5 days. Shipping is free on subscriptions and on one-time orders over $50.

Returns are easy. Every order is covered by our 90-day money-back guarantee — email help@lumanutrition.com and we’ll handle everything.

Is It Safe?

Yes — our NAC is made in FDA-registered, GMP-certified U.S. facilities with no proprietary blends. Every batch is third-party tested for purity and potency by an independent ISO 17025-accredited lab.

Heads up: NAC has a natural sulfur smell — that’s the active compound, not a defect. If you’re pregnant, nursing, or take blood thinners or nitroglycerin, consult your healthcare provider before use.

Ingredients

600 mg of N-Acetyl Cysteine per 1-capsule serving.

No artificial dyes or preservatives. Made in FDA-registered, GMP-certified U.S. facilities.

3rd-Party Testing

Every batch is tested by an independent ISO 17025-accredited lab — potency, heavy metals, and microbiology. We publish every result. Click here.

Start feeling these benefits in 90 days or less.

Whether it's the airways you want clearer, the liver you want supported, or the antioxidant reserve you want rebuilt — NAC is the one compound working all three.

Respiratory comfort

Helps thin and loosen mucus for clear, comfortable breathing.

Glutathione precursor

The raw material your body uses to make its master antioxidant.

Liver support

Supports the liver's natural detoxification pathways.

Daily defense

A staple compound with decades of research behind it.

What real customers are saying.

★★★★★ 5.0 · 20 reviews · verified buyers of this formula

Terrance S.
★★★★★

“I just quit smoking. using this product has helped a lot by helping clear out excess mucus.”

Terrance S.NAC · Verified buyer
ALICE A.
★★★★★

“It's a good product by all standards. Will recommend it for all who are interested in staying healthy.”

ALICE A.NAC · Verified buyer
★★★★★

“It seems to be a good product. I have been taking it for a week now and it seem to be helping in all aspects.”

KevinNAC · Verified buyer

Most NAC cuts corners on purity.

A sulfur compound is only as good as its sourcing.

Purity matters

NAC quality varies wildly between suppliers. Ours is third-party verified for purity and potency, every single lot.

Hidden blends

Proprietary blends let a brand list an ingredient while telling you nothing about how much is actually inside each capsule.

Untested

Many brands claim third-party tested. Can they prove it? Ask them for a result. We post ours freely. Click here.

We built this bottle to a higher standard. Here’s the proof.

Premium quality for a fair price. The Luma 4-Point Verification checks potency, purity, microbiology and identity confirmation on every batch. We publish the results of all third-party testing.

Why our NAC is better.

LumaOthers
Full Daily DoseYesNoDose Stated On LabelYesNoNo Proprietary BlendsYesNoThird-Party TestedYesNoPublished Lab ReportsYesNo
Per daily serving. Others = median across the ten best-selling comparable bottles, Amazon, July 2026.

How long until I see results?

This one builds with consistent daily use rather than hitting all at once. Typical, not guaranteed — which is why the guarantee runs 90 days.

Week 1–2 Breathing easier

Respiratory comfort is often the first thing customers notice.

Week 2–4 Reserves rebuilt

Your glutathione reserve builds with daily raw material.

Week 4+ Daily defense

Consistent NAC keeps the antioxidant supply line open.

Trusted by world-class medical professionals.

Dr. Kela Smith
Dr. Kela SmithPhD, DNM
Integrative & functional medicine✓Recommends for metabolic support

“What I really love about Luma Nutrition is how dedicated they are to purity, proper dosing, and smart formulation.”

Dr. Blane Schilling
Dr. Blane SchillingM.D.
Sports & regenerative medicine✓Recommends for joint and recovery

“These aren’t just pretty labels. They really deliver. The dosing is where most brands quietly cut corners.”

Dr. Erica Ginsburg
Dr. Erica GinsburgM.D.
Internal medicine✓Recommends for heart health

“Quality ingredients, appropriate dosing, thoughtful formulations. I’m comfortable recommending them to patients.”

These practitioners partner with Luma Nutrition as paid ambassadors, sharing their own opinions and experience.

Jake Langley, founder of Luma Nutrition

I couldn’t find a brand I trusted. So I built one.

It started with a supplement I almost bought for my parents. The label looked impressive. But I couldn’t find any test results, and the dose was a fraction of what the research used.

The Army drilled honor and integrity into me. You don’t cut corners when people are counting on you. The supplement industry cut them everywhere I looked.

So I built Luma to a higher standard: meaningful doses, independent testing on every batch, and verified results anyone can see.

Nothing goes in these bottles that I wouldn’t give my family or take myself. We’ll never ask you to trust a claim we aren’t willing to prove.

Questions? Reach out. I read and answer them.

Jake Langley signature
Jake LangleyFounder · U.S. Army Infantry Officer
Jake’s Deal

Take it for 90 days. If you don't feel the difference, you get your money back.

We refund the whole order, empty bottles included. We stand behind the quality of what we make, and we’re confident enough to put our money where our mouth is.

Jake Langley signature Jake Langley · Founder, U.S. Army Officer
Shop this formula
Jake Langley
90-day money-back guaranteeEmpty bottles included
Made in the USAFDA-registered, NSF GMP
Third-party testedEvery batch, published
Veteran-ownedFounded by a U.S. Army officer

Questions before you order.

How long until I see results?

Respiratory comfort often shows within the first couple of weeks; the antioxidant-reserve benefits build over two to four weeks of daily use.

How do I take it?

One serving daily. The full serving size is on the label — consistency matters more than timing.

Can I take this with my prescriptions?

Ask your doctor first if you take blood thinners or nitroglycerin, as NAC can interact with both. Call us before you order and we will talk it through.

How is this different from a cheaper version?

Purity. NAC quality varies wildly between suppliers; ours is tested and published for every lot, and the dose is stated plainly.

Is it made in the USA and tested?

Yes — made in FDA-registered, GMP-certified U.S. facilities, and every batch is tested by an independent ISO 17025-accredited lab. We publish every result.

What if it does not work for me?

You get your money back. The whole order, empty bottles included, for 90 days. No forms and no restocking fee.

Real customers, real results.

Verified buyers of this formula, in their own words.

5.0★★★★★20 reviews
5★91%
4★6%
3★2%
2★1%
Read all 20 reviews →
Individual results vary. These statements have not been evaluated by the FDA.