CircO2 is a revolutionary, fast-dissolving lozenge designed to restore and boost your nitric oxide levels in just minutes. Developed based on an MIT breakthrough that recognizes the importance of oral bacteria for nitric oxide production, CircO2 bypasses the inefficiencies of standard pills and powders, delivering a potent and effective dose of key nutrients directly where they are needed most.

By restoring optimal blood flow, CircO2 helps to naturally support a wide range of bodily functions. Users often report a profound sense of renewed energy, mental clarity, and overall well-being.

CircO2 Benefits:

🏃♀️💨 Renewed Energy & Stamina: Restore your natural vitality and overcome fatigue to stay active and pursue your passions.
🧠💡 Sharper Memory & Cognitive Function: Boost blood flow to the brain, helping you remember names, recall facts, and maintain a mental edge.
❤️🩺 Healthy Blood Pressure Support: Relax blood vessels for improved circulation, which can lead to healthier blood pressure readings.
😉🔥 Enhanced Sexual Performance: Optimal blood flow is essential for intimacy and performance, and CircO2 can help restore it.
🌡️👣 Improved Circulation: Say goodbye to cold hands and feet as you improve blood flow throughout your body.
🤸‍♂️✨ Increased Mobility: Better circulation means more oxygen and nutrients reach your joints, reducing discomfort and improving mobility.

For more information, see Nitric Oxide.

⭐⭐⭐⭐⭐ "I'm 76 and Back on the Golf Course!" — Robert G., Georgia, USA
"For years, my love for golf was fading. My left leg hurt so bad I could only play every other hole, and sometimes I'd just sit on the sidelines. I thought that was just a part of getting old. But then I tried CircO2. I'm 96, and I can't believe the difference. The pain is so much better, and I'm playing every hole again! CircO2 gave me my favorite hobby back."

⭐⭐⭐⭐⭐"My Blood Pressure is Finally Under Control" — Aron C., Kansas, USA
"I've been on medication for my blood pressure for years, but it was still a constant worry. My doctor had me on maxed-out beta-blockers, and I felt like I was running out of options. When I started taking CircO2, I was skeptical, but the results speak for themselves. My blood pressure is finally back to normal levels. It’s been a huge deal for me and has given me so much peace of mind."

⭐⭐⭐⭐⭐ "More Energy, Better Focus, and a Clearer Mind" — Ronald S., Mississippi, USA
"For a long time, I just felt tired and exhausted all the time. My energy levels were so low that it was a struggle to get through the day, and my concentration was shot. Since starting CircO2, my energy has increased greatly. My mindset has improved, and my concentration is so much better. The taste is great, and it's easy to take. I highly recommend this product to anyone who feels like they're in a slump. I'm so grateful for the renewed energy and focus."

⚡️ Beet Root Powder: This is a key player in nitric oxide production. Beets are naturally rich in dietary nitrates, which your body—specifically the bacteria on your tongue—converts into nitrites, and then into nitric oxide. This process is a direct and efficient way to boost your levels and improve blood flow, which is why it's a favorite among athletes for enhanced stamina and performance.
➡️ L-Citrulline: While many supplements use L-arginine as a precursor to nitric oxide, it often has poor absorption. L-citrulline is a superior alternative. When you take L-citrulline, it bypasses the "first-pass metabolism" that breaks down L-arginine and is converted into L-arginine in your kidneys. This creates a sustained and more effective supply of the building block your body needs to produce nitric oxide, especially for those over the age of 45.
❤️ Hawthorn Berry: Used for centuries to support heart health, hawthorn berry is a vital component of the CircO2 formula. It contains compounds that help relax blood vessels and are known to enhance the absorption of nitric oxide. This means your body can make the most of every dose, ensuring efficient delivery of oxygen and nutrients throughout your body.
🔋 Vitamin B12: As we age, our ability to absorb vitamin B12 from food decreases, and a deficiency can affect energy levels and nerve health. The Vitamin B12 in CircO2 is an essential nutrient that helps support overall energy and also plays a direct role in maintaining the health of your nervous system, a crucial part of the body's messaging network.
🛡️ Vitamin C: This well-known antioxidant does more than just boost your immune system. In the context of nitric oxide, Vitamin C acts as a powerful catalyst. It helps to both initiate the production of nitric oxide and protect it from oxidative damage, ensuring the newly produced molecules can perform their job effectively and for a longer duration.
🌊 Magnesium: This essential mineral is crucial for hundreds of bodily functions, including cardiovascular health. Magnesium plays a key role in relaxing blood vessels, which directly contributes to healthy blood pressure. By helping to reduce vascular tension, it works synergistically with the other ingredients to promote better blood flow and circulation.

Charlotte from Louisiana (US) Recommends: Buy Now

Nitric oxide is far more than just a passing health trend; it's a fundamental molecule essential for a wide range of biological functions. By boosting your body's natural production of this vital compound, you can experience a profound and comprehensive improvement in your health and vitality. Here are 10 key benefits you can expect from restoring your nitric oxide levels:

1. Supports Healthy Blood Pressure: By relaxing and widening your blood vessels, nitric oxide allows blood to flow more freely, reducing strain on your heart and supporting healthy blood pressure readings.
2. Enhances Cognitive Function: Your brain needs a constant supply of oxygen-rich blood to operate at its best. Optimal nitric oxide levels improve cerebral blood flow, leading to sharper memory, better focus, and a clearer mind.
3. Boosts Energy and Stamina: With improved circulation, oxygen and nutrients are delivered more efficiently to your muscles. This can translate into increased endurance, reduced fatigue, and a greater capacity for physical activity.

4. Improves Sexual Performance: Healthy blood flow is crucial for sexual health in both men and women. By relaxing the vascular smooth muscles, nitric oxide can significantly enhance blood flow to the reproductive organs.
5. Promotes Cardiovascular Wellness: Maintaining healthy and flexible arteries is key to long-term heart health. Nitric oxide helps to keep blood vessels supple and responsive, protecting against age-related decline.
6. Reduces Muscle Soreness & Speeds Recovery: Better blood flow helps deliver nutrients and remove metabolic waste products from muscles, which can reduce post-workout soreness and accelerate recovery time.
7. Increases Nutrient Absorption: When your blood vessels are open, your body is better able to absorb and utilize nutrients from the foods and supplements you consume.
8. Supports Strong Immune Function: Nitric oxide plays a role in the body's immune response, helping cells communicate and respond to threats.
9. Combats Cold Hands and Feet: Poor circulation is a common cause of cold extremities. By improving blood flow to your limbs, nitric oxide can provide a natural and effective solution.
10. Encourages Restful Sleep: As the body receives optimal oxygen and nutrients, it can function more efficiently, leading to a sense of overall balance that supports more restful and rejuvenating sleep.

Click to Buy Nitric Oxide

MIT Scientists Recommend CircO2

Pioneering research from scientists at the Massachusetts Institute of Technology (MIT) has unveiled the transformative power of nitric oxide, confirming its role as a "master signal molecule" and the key to unlocking your body's full potential. Their findings reveal that unlike many traditional supplements that simply mask symptoms, nitric oxide works at the very core of age-related decline.

MIT's research has proven that by restoring optimal nitric oxide levels, you can trigger a cascade of benefits that revitalize your entire system. This master molecule unleashes a powerful change by:

✔️ Restoring Flexibility and Flow: It restores the flexibility of your blood vessels, allowing blood to flow freely to your heart, brain, and muscles.

✔️ Supercharging Your Cells: It enhances the delivery of oxygen and nutrients at a cellular level, giving you more energy and endurance while ensuring your organs function at their peak.

✔️ Supporting Your Body's Balance: It naturally supports healthy blood pressure without the need for harsh chemicals or risks of dependency.

✔️ Boosting Brain Power: It directly improves cognitive function by increasing blood flow to the brain, which sharpens memory and enhances focus.

In short, the science from MIT confirms that nitric oxide isn't just another supplement; it's a foundational solution that optimizes your body's performance systems from the inside out, leading to powerful, long-lasting results.

It Works with Your Body, Not Against It
Unlike artificial stimulants or chemical-based formulas that give you a temporary high and a harsh crash, nitric oxide works naturally. It enhances your body's own production of this vital molecule to improve blood flow, increase oxygen delivery, and boost nutrient absorption—all without putting stress on your heart or liver.

It Targets the Root Cause of Decline
Other products simply mask symptoms like fatigue, low stamina, or poor recovery. Nitric oxide goes straight to the source of the problem: reduced blood vessel flexibility and inefficient oxygen delivery. By restoring healthy circulation, it supports your entire body's performance and recovery, giving you more than just a quick fix.

Backed by Clinical Science
Forget about under-dosed or unproven ingredients. The key compounds in a high-quality nitric oxide formula, such as L-citrulline and essential vitamins, are clinically researched and proven to naturally elevate your nitric oxide levels. This means you get real, tangible, and lasting benefits.

All-Day Energy without the Crash
Tired of the highs and lows from energy drinks and caffeine-heavy supplements? Nitric oxide works at the cellular level to keep your energy stable and consistent throughout the day. It fuels your workouts, your workday, and your life without the dreaded burnout.

The Ultimate All-in-One Solution
While other "performance boosters" focus solely on muscles, nitric oxide supports your whole body. It promotes healthy blood pressure, sharp mental focus, and optimal cardiovascular function, making it the one solution you need for both peak performance and total wellness.

Accelerates Recovery, Defies Age
Nitric oxide doesn't just give you a temporary boost; it enhances post-workout recovery by improving nutrient delivery and reducing muscle soreness. Best of all, it directly counteracts the age-related decline in nitric oxide production, helping you stay active and youthful well into your 50s, 60s, and beyond.

Based on the information provided, here are the key guarantees and warranties for the CircO2 product:

☑️Satisfaction Guarantee
Every purchase of CircO2 is backed by a "Down to the Last Lozenge" guarantee. This means that if you are not completely satisfied with the product for any reason, you can return it within 90 days of your purchase for a full refund of the product price.

☑️ Refund Policy
To receive a refund, you must return the product box, even if it is empty. You are responsible for the return shipping costs. The refund will be the full amount you paid for the product itself, not including any shipping fees you may have paid for the original order.
This guarantee allows you to try the product for up to three months to see the benefits for yourself, with the assurance that your purchase is protected.

1. Is CircO2 safe to take?

Yes. The ingredients in CircO2 have a long history of safety and have been used by thousands of customers without reports of serious side effects. The formula is designed to improve blood flow, so if you have low blood pressure or are on medication, it's always a good idea to consult with your physician before starting any new supplement.

2. How long will it take for me to feel the effects of CircO2?

Many people feel an effect in just a few minutes, while for others, it may take a few days or weeks to notice significant changes. Each person's body responds differently. We recommend you take CircO2 consistently for at least the first month to give the ingredients time to fully restore your nitric oxide levels. You are protected by our 90-day, "down to the last lozenge" guarantee, so you have plenty of time to see the benefits for yourself.

3. I already have a lot of energy and healthy blood pressure. How can CircO2 help me?

That's fantastic! Continued healthy habits are key. However, the fact is that your body's ability to produce nitric oxide naturally decreases with age, regardless of your current health. CircO2 helps protect your cardiovascular system and endothelium (the inner lining of your blood vessels) as you get older, ensuring you can maintain that youthful energy and vitality for years to come.

4. Will taking CircO2 interfere with my oral hygiene products like mouthwash?

Good oral hygiene is important. While antiseptic mouthwash can temporarily disrupt the bacteria on your tongue, CircO2’s patented lozenge formula is designed to give the ingredients enough time to mix with these special bacteria and start making nitric oxide right in your mouth. You can continue your regular routine without worry.

5. How often should I take CircO2?

Many people get great results from taking just one tablet in the morning. For the first week or two, we suggest you take CircO2 twice a day to fully saturate your body and restore your nitric oxide levels. After that, you can try reducing your intake to once a day and see how you feel.

6. Do I have to let the lozenge dissolve completely in my mouth?

It is best to let the lozenge dissolve completely for maximum effect. However, if you're in a hurry, it's okay to let it dissolve for a minute or two and then chew the rest. This still gives the ingredients enough time to mix with the bacteria and kickstart nitric oxide production.

7. Does CircO2 contain caffeine or other stimulants?

No. CircO2 does not contain any caffeine, stimulants, or artificial ingredients that can give you a jittery, artificial energy jolt. Instead, it works naturally with your body to improve blood flow, so all you feel is the clean, high energy you had when you were younger.

8. Is my purchase protected by a guarantee?

Yes. We are so confident you will love CircO2 that every purchase is backed by our "Down to the Last Lozenge" guarantee. If you are not completely satisfied for any reason, simply return the box—even if it's empty—within 90 days for a full refund of your purchase price (you only pay return shipping).

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CircO2 Improves Nitric Oxide Levels Within 30 Minutes

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What are the Ingredients of Nitric Oxide: The CircO2?

Beet Root Powder

Hawthorn Berry

L-Citrulline

10 Key Benefits of Nitric Oxide

The Groundbreaking MIT Discoveries on Nitric Oxide