Nitric Oxide Levels Jump 200%

CircO2 product with guarantee seal

Nitric Oxide Levels Jump 200% Higher In Just 20 Minutes

Boosts your energy… sharpens memory… increases stamina… enhances sexual performance… and helps lower blood pressure


1,614 Reviews

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Why You Need Nitric Oxide

Nitric oxide is the “youth molecule” your body uses to keep your blood vessels open, oxygen flowing, and brain firing.

But research shows that by age 70 your nitric oxide levels drop by a whopping 75%. By 80, nitric oxide levels are down by 85%.

This dramatic decline is the hidden cause behind:

  • Fatigue that keeps you from activities you love
  • Blood pressure concerns your doctor keeps monitoring
  • “Senior moments” and frustrating memory lapses
  • Reduced intimacy and performance in the bedroom
  • Joint discomfort that limits your independence
  • Cold hands and feet from poor circulation

When nitric oxide plummets, you don’t just feel older — your body literally starves for oxygen and nutrients.

The good news? CircO2 fixes your nitric oxide problems in 20 minutes. So you can reverse your symptoms fast.

Why Most “Nitric Oxide” Supplements Fail

The most common ways people try to boost their nitric oxide levels don’t work. Here’s why:

L-arginine supplements

Clinical studies show L-arginine loses up to 75% of its potency during digestion. What’s more, after age 45, your body struggles to convert L-arginine to nitric oxide at all.

Beet juice and leafy greens

While effective, you’d need 2–3 pounds of these foods daily for therapeutic effects. Plus, their nitric oxide-boosting power varies depending on the soil these plants grew in.

Standard pills and capsules

These go straight to your stomach. But MIT scientists found that the first and most crucial step in nitric oxide production does NOT happen in your gut.

Nitric oxide decline chart

The MIT Breakthrough That Changes Everything

Nitric oxide time chart

MIT scientists discovered that nitric oxide production starts in your mouth. It’s the bacteria on your tongue that convert nitrates into nitric oxide. That’s the first and most important step.

That’s why CircO2 comes in fast-dissolving lozenges. You place one on your tongue, and within minutes it kickstarts nitric oxide production.

In clinical testing, this method raised nitric oxide levels 200% within 20 minutes. And it increased blood flow by a staggering 34%.

No pill or capsule can achieve these results.

3 Energy-Enhancing Nutrients

#1 Beet Root Powder – Olympic-Level Stamina & Power

Beet root is a favorite of Olympic athletes – and for good reason. It’s rich in natural nitrates that help open up blood vessels, improve oxygen flow, and supercharge your stamina.

Beet Root Powder

#2 Hawthorn Berry – The Absorption Booster

Used for centuries to support the heart, hawthorn berry is now known to enhance nitric oxide absorption. So it helps your body get more nitric oxide out of every dose.

Hawthorn Berry

#3 L-Citrulline – Superior to L-Arginine

L-citrulline converts to nitric oxide more effectively than L-arginine, especially if you’re over 45. It supports circulation, blood pressure, memory, and sexual performance.

L-Citrulline

More Nutrients That Multiply the Benefits

CircO2 also includes more ingredients that enhance nitric oxide production:

Vitamin B12

Vitamin B12

After 50, up to 30% of adults become B12 deficient. The B12 in CircO2 boosts energy, nerve health, and nitric oxide production.

Vitamin C

Vitamin C

Acts as a catalyst for nitric oxide production and protects existing nitric oxide from oxidative damage.

Magnesium

Magnesium

Relaxes blood vessels, regulates heart rhythm, and supports recovery.

Together, these ingredients create the most complete, scientifically-advanced nitric oxide restoration system available.

How CircO2 Will Transform Your Daily Life

People who take CircO2 report the following benefits:

Renewed energy and stamina to stay active, travel, or pursue passions without afternoon fatigue
Sharper thinking and recall – remember names, where you put things, and maintain your mental edge in conversations
Healthier blood pressure readings that will impress your doctor
Enhanced mobility and comfort as your joints receive more oxygen and nutrients
CircO2 benefits
Improved intimacy and performance through better blood flow to all areas of the body
More restful sleep and waking refreshed, not groggy
A sense of youth and vitality as your brain and body receive optimal oxygen and nutrients

Dr. Greg Eckel

About Dr. Greg Eckel

Dr. Eckel is a Naturopathic Physician with more than 23 years of experience in Integrative and Regenerative Medicine.

He is the founder of Energy4Life Centers, where he practices his unique combination of naturopathy, Chinese Medicine, and cutting-edge technologies. He has a track record of success with difficult cases, and patients fly in from all over the world to see him.

He has been featured on major networks such as ABC, NBC, and FOX, and is the author of the book “Shake it Off: An Integrative Approach.”

Dr. Eckel has served as the President of the Board of Naturopathic Medical Examiners.

Customer Testimonials

“This supplement works very good. I could feel the results within a couple days. So much easier to get a deeper breath now.”

– Randy W.

“I’m 76 years old. My blood pressure went from 140 over 80 to 110 over 68. This is a big deal.”

– Merlin K.

“Feeling fresh and lively after taking CircO2. More energy and stamina.”

– James M.

“This product has increased my energy levels greatly. My mindset has improved and my concentration levels are much better. Easy to take and a pleasant taste.”

– Sherrolyn E.

Try CircO2 Risk-Free with Our 90-Day Guarantee

We’re so confident CircO2 will transform how you feel, we offer a “Down to the Last Lozenge” guarantee.

If you’re not completely satisfied for any reason, simply return the box – even if it’s empty – within 90 days for a complete refund.

Choose the number of boxes you will order today. We suggest you order at least 3 boxes. You’ll save $15. And we’ll cover the cost of shipping, too!

Since you can try CircO2 for almost 90 days, 100% RISK FREE, you have absolutely nothing to lose… and everything to gain!

Order Now

CircO2 with guarantee

Still Undecided?

Here are some of the top questions people have about CircO2…

Yes. The ingredients in CircO2 have a long history of safety. We have thousands of customers who have taken it and we have never received reports of serious side effects. That said, one of the benefits of this formula is that it relaxes the blood vessels and improves blood flow. So people who have low blood pressure should consult with their physician before taking CircO2.

Many people can feel an effect in just a few minutes. For others it takes longer. Some people say they noticed some changes in the first couple of days, and then even more benefits after taking it for a week or two. If you don’t notice an immediate difference, we recommend you keep taking it until you finish the box. You’re protected by our “down to the last lozenge” guarantee.

First, keep doing what you’re doing! But even if you’re maintaining healthy habits, the fact is that endothelial function decreases with age. Luckily, CircO2 helps protect your endothelium. And since there’s absolutely no downside, you can take it and know that it’s helping to keep you healthy as you get older.

Good oral hygiene is important to your health. You can certainly switch to natural products, but you don’t need to if you take CircO2. CircO2’s patented formula is in a lozenge that dissolves in your mouth. That gives it enough time to mix with the special bacteria and start making nitric oxide.

Many people get great results taking just one tablet in the morning. But we suggest you take CircO2 twice a day for the first week or two. After that, you can try just taking it in the morning and seeing how you feel.

It’s best to let it dissolve completely. But it’s okay if you let it dissolve a bit and then chew the rest. That still gives the ingredients enough time to mix with the bacteria.

No, CircO2 doesn’t contain any caffeine or any other ingredient that can give you an artificial energy jolt. Instead, CircO2 helps improve your blood flow. So all you feel is the natural high energy you had when you were younger!

CircO2 is not available in stores. To get your no-risk trial supply, click on the Order Now button below.

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CircO2 Reviews

1,614 Reviews  |  3.8 Average Rating  |  74% Recommend This Supplement
John K.Bristol, RI — April 18, 2026
Increased stamina and energy
Since taking CircO2 I have noticed increased energy and stamina.
✔ I Recommend This Supplement✔ Verified Customer
Ramiro S.San Pedro, CA — April 16, 2026
Great energy boost
I’ve been taking CircO2 for about 6 months. I’ve noticed a boost of energy in my workouts and throughout my entire day. The energy boost is noticeable in less than half an hour.
✔ I Recommend This Supplement✔ Verified Customer
Patricia A.Goodyear, AZ — March 29, 2026
Playing tennis at 87!
I am convinced that this product contributes to my 87-year-old body still being able to play a fast game of tennis. I’ve been using CircO2 for a couple of years now.
✔ I Recommend This Supplement✔ Verified Customer
Carolyn P.St. Louis, MO — March 20, 2026
Doctor impressed!
Went to the Doctor yesterday. She asked what I had been doing and I shared your product with her, and she was impressed. I am a 76-year-old female senior. Thanks for helping me be the best senior I can be.
✔ I Recommend This Supplement✔ Verified Customer

* Above are actual reviews from our customers. These customers’ statements may not reflect the typical purchaser’s experience and are not intended to represent or guarantee that anyone will achieve the same or similar results.

Disclaimers

  • Dr. Greg Eckel is compensated by Pure Health Lab for his work in endorsing this product.
  • These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, cure, or prevent a disease.

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