CircO2 Reviews – Is It Really Good for You?
CircO2 is a natural nitric oxide supplement designed to boost blood flow, enhance oxygen delivery, support energy, brain function, and cardiovascular health.
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What is CircO2?
CircO2 is a dietary supplement developed by Advanced Bionutritionals, designed to naturally boost the body’s nitric oxide (NO) levels.
It comes in quick-dissolving lozenges and contains a blend of amino acids, vitamins, and plant extracts aimed at enhancing blood flow, breathing, and cardiovascular health.
The lozenges are formulated to dissolve in the mouth, allowing for effective nitric oxide production without relying on digestion alone.
As we age, our natural nitric oxide production declines significantly—by up to 75% by the time we reach our 70s.
This decrease can negatively affect blood flow, energy levels, stamina, brain function, and even sexual performance.
CircO2 is specifically aimed at older adults or anyone experiencing signs of poor circulation and low energy, providing a science-backed way to stimulate NO production and restore vascular efficiency.
CircO2 is made in the USA in GMP-certified facilities, using non-GMO, soy-free, gluten-free, and dairy-free ingredients.
How Does CircO2 Work?
CircO2 works by enhancing your body’s natural nitric oxide production, a vital process that supports healthy blood flow and oxygen delivery.
Nitric oxide is a signaling molecule that relaxes the inner muscles of blood vessels, causing them to widen and improve circulation.
This allows for more efficient transport of oxygen and nutrients to your muscles, brain, and organs—essential for physical energy, cognitive clarity, and cardiovascular function.
As we age, our ability to produce nitric oxide naturally declines, which can lead to fatigue, cold extremities, brain fog, and even higher blood pressure.
CircO2 is formulated specifically to combat this age-related decline. This is especially beneficial for individuals over 40, whose nitric oxide levels may have dropped significantly.
With consistent daily use, CircO2 can help sustain higher nitric oxide levels, resulting in better vascular flexibility, improved blood pressure, and greater physical stamina.
Ingredients of CircO2
CircO2 contains a carefully selected blend of natural ingredients, each chosen for their proven ability to boost nitric oxide production and support cardiovascular health:
Vitamin C
Vitamin C is a powerful antioxidant that helps protect nitric oxide molecules from breaking down too quickly in the body. By preserving nitric oxide, vitamin C supports improved blood vessel dilation and overall cardiovascular health.
Vitamin B12
Vitamin B12 plays a vital role in energy metabolism and nervous system function. It helps the body convert food into usable energy and supports healthy red blood cell formation, which improves oxygen transport throughout the body.
Beet Root Powder
Beet Root Powder is a natural source of dietary nitrates that the body converts into nitric oxide. This conversion promotes the widening of blood vessels, leading to better blood flow and increased oxygen delivery to muscles and organs.
Hawthorn Berry Extract
Hawthorn Berry Extract has been used traditionally to support heart and vascular health. It contains flavonoids and antioxidants that help strengthen blood vessels, reduce inflammation, and improve endothelial function—the lining of the blood vessels responsible for releasing nitric oxide.
L-Citrulline
L-Citrulline is an amino acid that the body converts into L-arginine, which then produces nitric oxide. It is more effective than taking L-arginine directly because it bypasses rapid breakdown in the digestive system.
Sodium Nitrite
Sodium Nitrite serves as an additional source of nitrites, which the body can convert into nitric oxide, especially in conditions where oxygen levels are lower.
Benefits
- Improves circulation by enhancing nitric oxide levels, helping blood vessels relax and widen.
- Boosts energy and stamina, especially in older adults with declining nitric oxide production.
- Supports heart health by promoting healthy blood pressure and vascular function.
- Enhances cognitive function, improving memory, focus, and mental clarity.
- Improves physical performance and speeds up recovery after exercise or exertion.
- Promotes warmer hands and feet by improving blood flow to extremities.
- Helps reduce fatigue and increase overall daily vitality.
Pros
- All-natural ingredients with no toxic additives.
- Scientifically-backed formulation for increased nitric oxide production.
- Easy-to-use lozenge format—no pills to swallow.
- Boosts natural nitric oxide production.
- Supports heart, brain, and energy levels.
- Fast-acting with noticeable benefits.
- Backed by a 90-day money-back guarantee.
- Made in the USA, non-GMO, gluten-free, and dairy-free.
- Endorsed by medical professionals.
Cons
- Only available through the official website.
- Results may vary from person to person.
How to Use?
Using CircO2 is simple and convenient. Just take one lozenge daily, preferably in the morning or before physical activity for best results.
Place the lozenge under your tongue or let it dissolve slowly in your mouth—do not chew or swallow it whole.
This method allows the ingredients to interact with the natural enzymes and bacteria in your mouth, which is essential for converting the nitrates into nitric oxide.
Avoid brushing your teeth or using mouthwash immediately before or after taking the lozenge, as this can interfere with the nitric oxide production process.
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CircO2 Customer Reviews
Most of the CircO2 reviews have been overwhelmingly positive, boasting an impressive average rating of ⭐⭐⭐⭐☆ out of 5 stars.
Phyllis G.
“I noticed a big difference in the way I felt after using this amazing product. I am 81 years old. I now feel as good as I did in my 60’s. Within a week I was able to increase my walks from 1 to 5 kilometers a day. It’s hard to explain but I never run out of energy & no longer require mid day rests.”
Joni L., Grover Beach, CA
“My husband and I are in our 80’s and 90’s and our get-up-&-go got-up-& went! After trying lots of useless products, wasting time and money we decided to try CircO2. It worked!!! Our energy surged beyond measure, we sleep better and wake up fresh and ready to start the day!”
Angela L., Canada
“I have been taking this product for 3 weeks and I have noticed a great difference in my energy levels. I have suffered with fatigue in the past few years. But now my energy has improved so much that I get more done in my days.”
Anne G., Oxnard, CA
“I have been using CircO2 for about a year now, and I no longer worry about high blood pressure. I am delighted and relieved!!”
Money-Back Guarantee
CircO2 is backed by a 90-day, risk-free money-back guarantee, offering peace of mind to first-time users.
If you’re not fully satisfied with the results—even if you’ve used the entire box—you can return it within 90 days of purchase for a full refund, including the cost of shipping.
Price Details
CircO2 is available in three different packages to suit various needs and budgets:
- 1‑box (30-day supply): $49.95
- 3‑box bundle (90-day supply): $134.85 ($44.95 per box) with free shipping.
- 6‑box bundle (180-day supply): $249.00 ($41.50 per box) with free shipping.
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Where to Buy?
CircO2 is available exclusively through the official website. It is not sold in local pharmacies, retail stores, or on major third-party platforms like Amazon or eBay.
Buying from the official site also allows you to take advantage of discounted bundle pricing and any available promotional offers.
Conclusion
As an expert, I can confidently say that CircO2 stands out for its focused, science-backed approach to one of the most vital aspects of aging well—nitric oxide production.
It’s not just another energy booster—it’s a targeted formula that supports circulation, heart health, cognitive clarity, and physical stamina at the root level.
It’s safe, easy to use, backed by real science, and protected by a 90-day money-back guarantee, making it virtually risk-free to try.
If you’re looking for a natural way to restore vitality and support healthy aging, CircO2 is a smart and effective place to start.
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Frequently Asked Questions (FAQs)
Can CircO2 help with altitude sickness or low oxygen environments?
While CircO2 improves nitric oxide and blood flow, it’s not specifically formulated to treat altitude sickness. However, better circulation might ease mild symptoms.
Will CircO2 affect my blood pressure if I already have low blood pressure?
CircO2 supports healthy blood vessel dilation but generally balances blood pressure rather than causing drastic drops. Consult your doctor if you have concerns.
Can I take CircO2 before bedtime?
Yes, but since it may boost energy and circulation, some prefer taking it earlier in the day to avoid potential sleep disruption.
Is the lozenge safe for people with dental issues?
The lozenge dissolves slowly in the mouth and contains natural ingredients, but if you have sensitive teeth or oral conditions, consult your dentist first.
Does CircO2 have any stimulant ingredients like caffeine?
No, CircO2 contains no caffeine or stimulants, making it safe for those sensitive to such compounds.
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