circo2
CircO2: Promotes Stamina, Vitality & Heart Health

CircO2 is a revolutionary nitric oxide supplement made to enhance circulation, energy, stamina, and bedroom performance. CircO2 supports the body’s ability to produce nitric oxide. Nitric oxide (NO) is a vital molecule that supports blood circulation, oxygenation and cardiovascular function. As we age, NO levels naturally decline, leading to fatigue, sluggishness, & reduced performance.

➤ Encourages the body’s natural Nitric Oxide (NO) synthesis.
➤ Enhances Vitality, Stamina & Bedroom Performance naturally.
➤ Promotes optimal blood pressure & cardiovascular wellness.
➤ Antioxidants help reduce oxidative stress & supports youthful vitality.
➤ Strengthens immunity by improving nutrient & oxygen delivery to cells.

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Why Choose CircO2?

circo2 - made in USA

MADE IN USA

Proudly crafted within the United States, CircO2 is a testament to domestic quality & trustworthiness.

circo2 - natural ingredients

100% NATURAL

Embrace the power of nature with CircO2. Formulated with purely natural ingredients for your health & well-being.

circo2 - FDA

FDA APPROVED

Trust in our commitment to safety and efficacy, with the reassurance of FDA approval ensuring the highest quality standards.

circo2 - GMP

GMP Certified

CircO2 adheres to the most stringent manufacturing practices, offering a product that is vegan-friendly, gluten-free, and non-GMO.

What is CircO2?

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CircO2 is a premium supplement designed to increase the body's nitric oxide levels naturally. Nitric oxide is responsible for supporting healthy circulation, heart health, and daily energy levels. From Advanced Bionutritionals, CircO2 is an easy-to-take dissolvable tablet that combines various nutrients in precise amounts to re-establish nitric oxide production, which declines as one ages and is more difficult to maintain later in life.

Nitric oxide is a powerful vasodilator that supports improved oxygen intake and distribution across the body. CircO2 helps your body produce nitric oxide naturally through beetroot powder, hawthorn berry, L-citrulline, and vitamin C at ideal dosages.

Effective circulation extends beyond heart health—it also increases energy, stamina, and cognitive focus while reducing daily fatigue, naturally supports healthy blood pressure, and re-establishes youthful bedroom performance. CircO2 is not a stimulant or instant energy source but instead, works at the cellular level to restore the body's natural energy supply, so you can feel youthful, focused, and energized every day.

CircO2 Reviews
circo2 -David- reviews
David R - Houston, USA
⭐⭐⭐⭐⭐ Verified Purchase

"Before CircO2, I noticed that as I aged I was starting to feel a little bit of sluggish circulation and low energy. Once I started utilizing CircO2, my results were noticeable within weeks. My hands and feet have more energy—they're warm again—as is my body; I even sleep better at night! My doctor commended my progress with blood pressure levels! CircO2 is everything it promises to be!"

circo2 - nancy -reviews
Nancy S -  Chicago, USA 
⭐⭐⭐⭐⭐ Verified Purchase  

"I’ve been using CircO2 for about 3 months now and the results are incredible! I feel like a different person. My energy levels are through the roof—I no longer fatigue by midday. I even find my morning walks to be easier than ever before! My blood pressure has stabilized remarkably. I feel like CircO2 has turned back the clock—I'm younger by at least 10 years! It has become an invaluable part of my daily regimen!"

circo2 - Roger-reviews
Roger T - Texas, USA 
⭐⭐⭐⭐⭐ Verified Purchase  

"I am a very active person and since Circo2 I've experienced enhanced results and growth in my exercise activities. I feel more fluid in my movements, recover better in the gym, and even my morning work attentiveness has been better. It's clearly a result of improved circulation and such from the nitric oxide supplement."

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100% Satisfaction
90-DAYS Money Back Guarantee

CircO2 comes with a 100% money-back guarantee – 90 full days from your original purchase. If you're not totally and completely satisfied with our product or your results within the first 90 days, simply let us know by calling our toll-free number or emailing us, and we'll gladly give you a full refund within 48 hours of the product being returned.


How Does CircO2 Work?
CircO2 works by safely boosting your body's natural levels of Nitric Oxide (NO), the compound responsible for vasodilation and blood flow and delivery of oxygen to all parts of the body. By age 40, levels of nitric oxide are already declining, resulting in sustained poor blood flow and energy levels with adverse cardiovascular performance. The CircO2 formula contains a blend of clinically validated nutrients that can help increase nitric oxide levels naturally from within the body—on a cellular level.

CircO2 increases nitric oxide levels through a combination of ingredients. For example, beetroot powder, L-citrulline, hawthorn berry, and vitamin C work together to support the nitric oxide pathway and target blood vessels. Beets are a natural source of nitrates; L-citrulline is a nitric acid precursor that can be converted to nitric oxide; hawthorn is cardiovascular supportive but also vasodilatory; vitamin C is an antioxidant that prevents nitric oxide from too soon breakdown and conversion into other forms.

This process increases blood flow, delivering more oxygen and nutrients to the muscles, brain and organs alike, thereby resulting in increased energy levels and stamina from the inside out. Users experience higher levels of mental clarity, better heart health, improved circulation, and vascular integrity.

It also helps support your body's detox and immune systems by supporting increased oxygenation of cells while reducing oxidative stress. Unlike caffeine or other drastic energy-increasing methods, CircO2 provides a natural energy boost unlike any other without crashing or unwanted side effects.

It's time to restore the nitric oxide levels within your body naturally as CircO2 provides an increase in vitality from the inside out; you'll feel renewed in the heart, mind, and muscles when your body is at its optimum functioning level with CircO2.

Ingredients Used In CircO2

CircO2 includes clinically and scientifically validated natural ingredients that work harmoniously to restore and sustain optimal nitric oxide levels for cardiovascular support, athletic performance, and overall energy and health.

Each ingredient below plays a unique role in effective circulation and other wellness benefits: 

  1. Beetroot Powder: One of nature's most abundant sources of dietary nitrates. When consumed, the body converts these nitrates into nitric oxide (NO), the most potent vasodilator known. The increased blood flow helps increase oxygenation and nutrients delivery to cells, which means more energy, better endurance, and optimal performance for cardiovascular exercise. In addition, beetroot powder offers antioxidants like betalains to decrease inflammation and oxidative stress beneficial to heart and muscle function.
  2.  L-Citrulline: A naturally occurring amino acid that converts into L-Citrulline within the body, leading to increased amounts of nitric oxide production as vasodilation occurs more frequently based on body's healthy processes. This works to lower blood pressure, blood flow blockages, and enhanced circulation for improved athletic performance, as L-Citrulline is known to reduce fatigue and muscle soreness during the recovery phase post-exercise.
  3. Hawthorn Berry Extract: Hawthorn berry has long been celebrated in traditional wellness practices for its ability to strengthen the heart and improve blood vessels. In combination with its own antioxidants like flavonoids, it helps lower cholesterol deposits that cause circulation problems while also supporting healthy blood vessels by decreasing inflammation. Hawthorn promotes artery elasticity (a key aspect of blood pressure stability) and enhances blood vessel strength.
  4. Vitamin C: One of the most recognized antioxidants in natural wellness solutions, it helps preserve nitric oxide molecules from free radical attack over time in the bloodstream, allowing them to be bioactive for longer amounts of time. Vitamin C also decreases oxidative stress on genetic material as it protects collagen production, which supports vascular integrity. Moreover, vitamin C increases immune function, iron absorption, and levels of antioxidants to increase vitality while also decreasing avoidable aging processes.
  5. Magnesium: One of the most important minerals in human biology magnesium supports basic biochemical cellular reactions for everything from maintaining heartbeat function to nerve stimulation and muscle relaxation. This correlates with vascular tone as optimal magnesium levels promote health blood pressure levels and cardiac output/frequency. Magnesium also plays a role in energy production; thus reducing fatigue relative to daily objective accomplishment.
  6. Vitamin B12: Vitamin B12 is one of the most critical nutrients for red blood cells to circulate oxygen from the lungs to the rest of the body. This is particularly supportive of the brain and nervous system while reducing tiredness and weakness through decreased fatigue. Ultimately, adequate levels of B12 keep the cardiovascular system functioning well to avoid complications of poor oxygen movement through the body.
  7. Sodium Nitrite: Sodium Nitrite serves as a precursor molecule to nitric oxide molecules within the bloodstream; when consumed, sodium nitrite turns into NO quickly and efficiently producing vasodilation and improved oxygen travel through the body to ensure better endurance capabilities, cardiovascular performance and blood pressure regulation. 

Benefits Of CircO2

  • Improves Circulation: CircO2 reduces the ability of blood vessels to tighten, widening them so that blood can more easily flow in and out of the heart and to vital systems. Therefore, circulation improves blood flow, oxygen, and nutrient delivery to different parts of the body.
  • Improves Cardiovascular Function: CircO2 reduces blood pressure thanks to the vascular tightening prevention and deep-rooted relaxation and flexibility CircO2 promotes for blood vessels. This means that your heart will not have to work as hard pumping more blood through its systems.
  • Increases Energy & Endurance: With more oxygen traveling through the body, muscles operate better with the ability to outperform previous feats to achieve increased energy levels and endurance. Fatigue won't plague you as CircO2 provides all-day energy.
  • Enhances Clarity & Focus: Like any muscle, the brain operates better when it has more oxygen to learn, remember, and focus. CircO2 provides improved cognitive functioning as blood and oxygen supply enhanced resources to the brain.
  • Promotes Healthy Blood Pressure: CircO2 increases the nitric oxide threshold, meaning that naturally decreased blood pressure levels are supported through relaxation of blood vessel stiffness with tightening prevention and circulation management improvements.
  • Amplifies Immune Function: The vitamins and antioxidants within CircO2 allow for cellular repair after oxidative stress while boosting the immune system's resilience by helping recover from illness faster with CircO2 support.
  • Supports Healthy Aging: With increased circulation comes nutrient absorption and cellular oxygenation, supporting systemic health in aging adults. Experience improved mobility and comfort as your joints get a boost of oxygen and nutrients!
  • Reduces Fatigue & Muscle Soreness: CircO2 promotes increased athletic/physical performance by enhancing nitric oxide levels, which means muscles heal faster from exercise so that soreness, stiffness, or aging fatigue do not impede success.

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circo2 supplement

100% Satisfaction
90-DAYS Money Back Guarantee

CircO2 comes with a 100% money-back guarantee – 90 full days from your original purchase. If you're not totally and completely satisfied with our product or your results within the first 90 days, simply let us know by calling our toll-free number or emailing us, and we'll gladly give you a full refund within 48 hours of the product being returned.

CircO2 - FAQ's

Yes. CircO2's ingredients have a long-standing safety record. In addition, CircO2 has thousands of users and we have never had a report of any major side effects. That said, one of the great benefits to this proprietary blend is that it naturally vasodilates and increases circulation, so anyone with low blood pressure should check with their physician prior to taking CircO2.

Some people feel it working in just a few minutes. Others take longer. Some say they felt some change in the initial couple of days, and then went on to experience even greater benefits after a week or two. Everyone is different. In terms of not feeling different from it instantly, I suggest you finish out the box and see how you feel. My "down to the last lozenge" guarantee has you covered so if you feel like you got no value whatsoever (which I doubt), as long as you let me know within 90 days of purchasing it I will happily issue a refund.

First and foremost—keep up the good work! You're ensuring great health for yourself throughout your life—even as you age! But regardless of your healthy lifestyle, something called Endothelial Function does deplete as we age, but CircO2 protects your endothelium. Therefore, you can rest assured that CircO2 has no adverse effects and will protect your endothelium while you age to keep you as healthy as possible.

Good oral care is essential for your well-being. You can switch to natural/flouride-free options, but you won't have to with CircO2. CircO2's patented formula is in a lozenge that dissolves in your mouth. Thus, it spends enough time in your mouth to interact with the requisite bacteria and begin creating nitric oxide.

Most people achieve great results from just one tablet in the morning; however, we recommend taking CircO2 twice daily for the first week or two. Then, you may want to try once daily in the morning only and see how you feel.

You should let it dissolve entirely. But if you let it dissolve a little and chew the rest, that's fine. It gives the ingredients enough time to interact with the bacteria.

No, CircO2 has no caffeine...or any other ingredient that will provide you with an artificial boost of energy. CircO2 increases blood flow. So all you experience is the naturally high energy levels you had in your youth!

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If CircO2 doesn’t meet your expectations or if you’re just not happy with it for any reason, don’t worry! Our 90-day money-back guarantee protects you. Just get in touch within 90 Days of your purchase, and we’ll gladly issue a full refund—no hassle involved.

To request your refund, simply reach out to the CircO2 support team via email or give them a call using the customer care number found on your order invoice. They’re always ready to assist you!

FDA Compliance

Please note that the information we provide is not intended to replace consultation with a qualified medical professional. We encourage you to inform your physician of changes you make to your lifestyle and discuss these with him or her. For questions or concerns about any medical conditions you may have, please contact your doctor.

Statements on this website have not been evaluated by the Food and Drug Administration. Products are not intended to diagnose, treat, cure or prevent any disease. If you are pregnant, nursing, taking medication, or have a medical condition,
Consult your physician before using our products.

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