(2,158 Reviews)
NAC Supplement
Used By Over 200+ Clincs In the U.S
- Breathe Deeply Again
- Silence The Cough
- Clear Brain Fog
- Dissolve Stubborn Mucus
90-Day Money-Back Guarantee
Free Worldwide Shipping
The Systemic Clarity Standard
Dr. Marcus J, M.D Pulmonologist
“It enzymatically severs the chemical bonds of stubborn mucus to physically clear bronchial passages, restoring the lungs' capacity for deep, efficient oxygenation, I recommend this to all my patients.”
How long until I feel a difference?
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Respiratory relief (mucus thinning) often begins within 1-2 hours of the first dose. Systemic benefits like returned motivation (the "spark") and sustained mental clarity typically compound over 2–4 weeks of consistent daily use.
Is it hard on the stomach?
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Pure NAC is a potent amino acid and can be acidic on an empty stomach. We recommend taking Aurexia 600mg with a meal (breakfast or dinner) to eliminate any GI discomfort while ensuring maximum absorption.
Can I take this if I don't have a cough?
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Absolutely. Many 40+ professionals use it strictly as a "Cellular Shield" for longevity and liver support. It actively replenishes antioxidant reserves and supports dopamine function, even if you aren't currently experiencing congestion.
Will this help with "brain fog" and focus?
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Yes. This is the "dual-action" benefit. Beyond lung health, NAC regulates glutamate levels in the brain. Users frequently report a "lifting of the veil," improved executive focus, and a quieting of "spinning thoughts" alongside respiratory relief.
As seen in
The Skincare Industry IS LYING TO YOU
The healthcare system has turned its back against you. They've started prioritizing profit instead of the people.
No Potency
In an effort to cut costs, companies dilute your serums to save their bottom line..
Invasive Needles
Traditional GHK-CU is delivered via injection, leading to skin irritation and confusion on usage
No 3rd Party Testing
No one actually knows what comes out of these companies manufacturers
Foreign Made
Manufacturing being outsourced to countries like China and Taiwan, with more lenient FDA regulations
The Skincare Industry IS LYING TO YOU
The healthcare system has turned its back against you.
They've started prioritizing profit instead of the people.
No Potency
In an effort to cut costs, companies dilute your serums to save their bottom line..
Invasive Needles
Traditional GHK-CU is delivered via injection, leading to skin irritation and confusion on usage
No 3rd Party Testing
No one actually knows what comes out of these companies manufacturers
Foreign Made
Manufacturing being outsourced to countries like China and Taiwan, with more lenient FDA regulations
But We're Here TO FIX THAT
QUALITY FIRST
Taking over 3 years to develop our patented formula, created by the top Korean skincare scientist offering you 99% potency within your GHK-CU
TOPICAL SERUM
NO MORE NEEDLES!
Our topical serum delivers the same efficacy and skin barrier penetration without the hassle.
32+ CLINICAL TESTS
We didn't just settle for 1 test, we wanted to ensure we delivered the highest quality product in the market.
MADE IN THE U.S.A
Formulated in Korea, manufactured in the U.S according to FDA regulations, our commitment to quality will always be our priority.
Still On The Fence? Here Is Proof You CAN'T DENY!
See the stunning transformations our product delivers — real results from real customers.
After
Before
The Journey To Your Youthful Glow
Follow your progress and see what's ahead on your path to glowing skin.
Week 1
The First Week
Most companies claim they have a "miracle serum", we're honest with our customers, you likely won't notice a big difference in your skin, but it's all about setting up the foundations to success.
Week 3
Okay... I'm Starting To See A Difference
By week 3, your skin cells have gone through a full cycle, shedding the old skin and bringing out the new revitalized skin barrier. This is where you will begin seeing the "glow" and a noticeable difference.
Week 6
The Compliments Are Flowing In...
By now your skin is fully saturated with the copper peptide, people around you are seeing a noticeable difference and likely giving you compliments on it. Your confidence is starting to reach new highs.
Week 8
I Don't Recognize My Old Self
Looking back at selfies from 2 months ago, you barely recognize yourself. You wake up with a renewed sense of confidence like never before, your friends are asking you what your "secret" is, but will you tell them?
The Zyvax Difference
Ryan R,
33
Verified Buyer
Been on GHK-CU for a month, I'm seeing solid changes, I used to be very prone to breakouts when I touched my skin because my hands would get dirty at work. But recently it feels like I can stop worrying about accidentally touching my face.
Product Name
$29.99 $39.99
Purchased on November 14th, 2025
Stacy L.,
48
Verified Buyer
Oh my goodness!!! I can not believe how well this worked for me, my co-workers said that I used to look stressed all the time because of my forehead wrinkles and pale, but this product changed everything!!
10/10
Product Name
$29.99 $39.99
Purchased on December 3rd, 2025
Jessica,
56
Verified Buyer
I'll be honest, I've wasted over $500 on skincare products, but none have worked like Zyvax's GHK-CU for me. It's single handedly dropped my monthly skincare spending from $200 to just $59.99.
Product Name
$29.99 $39.99
Purchased on November 22nd, 2025
Bethany K.,
64
Verified Buyer
I went to my weekly bingo night, and all my friends could not believe how much my skin had changed in just a month and a half. The young gentleman at the counter thought I was in my 40s!
Product Name
$29.99 $39.99
Purchased on September 14th, 2025
Money-Back Guarantee
We know the "guilty" feeling of a "product graveyard" full of "past purchase regrets". This serum was formulated to be the one you finally finish. If you don't love your transformation, send it back within 90 days for a full refund.
CLAIM NOW
100% Satisfaction
Fast Shipping
Safe Handling
Money-Back Guarantee
We know the "guilty" feeling of a "product graveyard" full of "past purchase regrets". This serum was formulated to be the one you finally finish. If you don't love your transformation, send it back within 90 days for a full refund.
CLAIM NOW
100% Satisfaction
Fast Shipping
Safe Handling
Frequently Asked Questions
Can I stack this with Tretinoin, Retinol, or Vitamin C?
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Do not mix directly. Copper ions can degrade Vitamin C and increase sensitivity with Tretinoin.
The Fix: Apply Zyvax GHK-Cu in the AM to signal protection and density, and use your Retinoids/Acids in the PM. Keep them separate to maximize efficacy.
Will this "Royal Blue" serum leave a sticky residue or pill?
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No. Unlike cheap formulations, this is engineered for an immediate "Glass Skin" finish.
It absorbs rapidly to signal repair without the tacky "glue" feeling. It layers perfectly under SPF or makeup without pilling, keeping your face card valid all day.
Why is this a higher investment than generic clear peptides?
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You are paying for clinical concentration, not water.
The deep royal blue color is the visual proof of high-percentage active GHK-Cu. Generic clear serums often "fairy dust" the ingredient;
Zyvax delivers a biological dose potent enough to trigger actual remodeling.
How does GHK-Cu build "density" if topicals don't penetrate?
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It works via Biological Signaling. The peptide doesn't need to reach the bone;
It docks with surface fibroblasts and sends a signal deep into the dermis, instructing your body to produce its own structural collagen and elastin from the inside out.
How long until I see structural jawline & hollow correction?
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Phase 1 (Glow): 1-3 days.
Phase 2 (Barrier Repair): 2 weeks.
Phase 3 (Structural Density): 8-12 weeks.
Remember, you are remodeling biological tissue, not just moisturizing it. Consistency is the cheat code for structural change.
Does this "Signaling Serum" replace my moisturizer?
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It replaces your active treatment serums (like Vitamin C or Hyaluronic Acid).
For oily skin, it provides sufficient hydration. For dry skin or to maximize the "Glass Skin" aesthetic, apply a barrier cream over it to seal in the signaling peptides.
Will this "Royal Blue" serum leave a sticky residue or pill?
+
No. Unlike cheap formulations, this is engineered for an immediate "Glass Skin" finish.
It absorbs rapidly to signal repair without the tacky "glue" feeling. It layers perfectly under SPF or makeup without pilling, keeping your face card valid all day.
How does GHK-Cu build "density" if topicals don't penetrate?
+
It works via Biological Signaling. The peptide doesn't need to reach the bone;
It docks with surface fibroblasts and sends a signal deep into the dermis, instructing your body to produce its own structural collagen and elastin from the inside out.
Does this "Signaling Serum" replace my moisturizer?
+
It replaces your active treatment serums (like Vitamin C or Hyaluronic Acid).
For oily skin, it provides sufficient hydration. For dry skin or to maximize the "Glass Skin" aesthetic, apply a barrier cream over it to seal in the signaling peptides.