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★★★★★ Loved by thousands of adults over 50

Raise Your Nitric Oxide Levels Up To 200% in 20 Minutes, With a Tiny Lozenge That Melts on Your Tongue

CircO2 helps support the natural energy, circulation and healthy blood flow you had in your younger years.

  • Supports steady, all-day energy and stamina
  • Promotes healthy circulation and blood pressure already in the normal range
  • Helps keep your mind clear and focused
  • Supports intimacy and performance through better blood flow
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✔ No caffeine✔ Made in the USA✔ Not sold in stores
CircO2 nitric oxide lozenges box

The Molecule Your Body Quietly Loses With Every Birthday

Nitric oxide is often called the "youth molecule". It keeps your blood vessels relaxed and open, so oxygen and nutrients reach every part of your body.

Here's the problem. Your body makes less and less of it as you age.

Research suggests that by age 70, nitric oxide production can drop by around 75%. By 80, it may be down as much as 85%.

And when nitric oxide drops, your body has a harder time moving blood, oxygen and nutrients where they need to go. Many people over 50 notice it in small ways at first, then the signs start piling up.

Nitric oxide levels decline with age chart
Low energyAfternoons where you just want to sit down
Blood pressure worriesNumbers your doctor keeps an eye on
"Senior moments"Forgetting names or where you left the keys
Less spark in the bedroomPerformance that isn't what it used to be
Stiff, achy jointsMoving around feels harder than before
Cold hands and feetA common sign of sluggish circulation
The good news? You can give your body the raw materials to make more nitric oxide again, and you can feel the difference fast.

Why Most "Nitric Oxide" Products Let You Down

If you've tried to boost your nitric oxide before and felt nothing, it probably wasn't your fault. Most popular options have a hidden flaw.

✕

L-Arginine Pills

Studies show a large part of L-arginine gets broken down during digestion. And after 45, the body has a harder time turning it into nitric oxide.

✕

Beet Juice & Greens

They help, but you'd need pounds of them every single day. Plus, their nitrate content changes a lot depending on the soil they grew in.

✕

Regular Capsules

They go straight to your stomach and skip the most important step of the whole process, which actually happens in your mouth.

The MIT Discovery: Nitric Oxide Starts on Your Tongue

Scientists at MIT found that the very first step in making nitric oxide doesn't happen in your gut. It happens in your mouth, thanks to friendly bacteria on your tongue that convert dietary nitrates.

That's exactly why CircO2 comes as a fast-dissolving lozenge, not a pill:

  1. You place one lozenge on your tongue and let it melt.
  2. The natural nitrates mix with the helpful bacteria in your mouth.
  3. Your body starts producing nitric oxide within minutes.
200%higher nitric oxide levels in 20 minutes*
34%increase in blood flow in testing*
CircO2 nitric oxide levels over time chart
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What's Inside Every CircO2 Lozenge

Three main nutrients work as a team to help your body make more nitric oxide, absorb it better and keep it working longer.

Beet root powder
Nutrient #1

Beet Root Powder

A favorite of elite athletes. Rich in natural nitrates that help open blood vessels and support oxygen flow and stamina.

Hawthorn berry
Nutrient #2

Hawthorn Berry

Used for centuries to support heart health. Helps your body get more out of every dose of nitric oxide.

L-Citrulline
Nutrient #3

L-Citrulline

Converts to nitric oxide more efficiently than L-arginine, especially after 45. Supports circulation and performance.

Vitamin B12
Vitamin B12

Up to 30% of adults over 50 run low. Supports energy and nerve health.

Vitamin C
Vitamin C

Helps nitric oxide production and protects it from oxidative stress.

Magnesium
Magnesium

Helps blood vessels relax and supports a steady heart rhythm.

CircO2 ingredients and benefits CircO2 supplement facts label
CircO2 box with money-back guarantee seal

What People Notice When They Add CircO2 to Their Morning

  • More energy and stamina to stay active, travel and enjoy your hobbies, without the afternoon crash
  • Clearer thinking, so names and details come back to you more easily
  • Healthy blood pressure support for numbers already in the normal range
  • Easier movement as joints and muscles get more oxygen and nutrients
  • Better intimacy thanks to healthy blood flow
  • More restful sleep and waking up refreshed
  • A youthful feeling of vitality from head to toe
Dr. Greg Eckel

Endorsed by Dr. Greg Eckel

Naturopathic Physician, 23+ years in Integrative Medicine

Dr. Eckel is the founder of bVital, where he combines naturopathy, Chinese Medicine and modern technology. Patients travel from around the world to see him.

He has appeared on ABC, NBC and FOX, wrote the book "Shake It Off: An Integrative Approach", and served as President of the Board of Naturopathic Medical Examiners.

What Customers Are Saying

Real feedback from people who take CircO2 every day.

★★★★★

"I've tried many nitric oxide supplements. This one is by far the best! I love your product and will be taking it forever."

Sheila K., Leesburg, VA
✔ Verified Customer
★★★★★

"I've been using CircO2 for about three years. I take it twice a day and I'm very happy with the results. I have more energy during the day."

Anthony V., San Angelo, TX
✔ Verified Customer
★★★★★

"I am never without CircO2! It makes me feel balanced without any harsh ingredients. I'm 80 years old and start my day with CircO2!"

Roxane M., Houston, TX
✔ Verified Customer
★★★★★

"I've noticed a boost of energy in my workouts and throughout my entire day. I've recommended CircO2 to friends of mine."

Ramiro S., San Pedro, CA
✔ Verified Customer
★★★★★

"This product has increased my energy levels greatly. My concentration is much better. Easy to take and a pleasant taste."

Sherrolyn E.
✔ Verified Customer
★★★★★

"Since taking CircO2 I have noticed increased energy and stamina."

John K., Bristol, RI
✔ Verified Customer
Customer testimonial

"Feeling better than I have in 10 years."

Most people take one lozenge in the morning. Many say they feel a difference within minutes. Others notice it over the first week or two.

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* Individual results vary. Testimonials reflect personal experiences and are not a guarantee of typical results.

Choose Your CircO2 Supply

Most people choose 3 boxes so they never run out and get free shipping. Every order is covered by the 90-day money-back guarantee.

Sample Option

1 Box

30-day supply
1 box of CircO2
$49.95 /box
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Total: $49.95
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3 Boxes

90-day supply
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$44.95 /box
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Total: $149.85$134.85
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6 Boxes

180-day supply
6 boxes of CircO2
$41.50 /box
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Total: $299.70$249.00
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The "Down to the Last Lozenge" 90-Day Guarantee

Try CircO2 for almost three full months. If you're not completely happy for any reason, just send the box back, even if it's empty, within 90 days for a full refund.

You take zero risk. The only thing you have to lose is that tired, run-down feeling.

Common Questions

Is CircO2 safe?

The ingredients in CircO2 have a long history of safe use, and thousands of customers take it every day. Because it helps relax blood vessels and supports blood flow, people with low blood pressure, or anyone taking medication, should talk to their doctor before using it.

How fast will I notice a difference?

Many people feel something within minutes. Others notice changes over the first few days, and even more after a week or two. Everyone responds a little differently, so we suggest finishing at least one full box before deciding.

How do I take it?

Place one lozenge on your tongue and let it dissolve. For the first week or two, many people take one in the morning and one later in the day. After that, one in the morning is often enough. If you prefer, you can let it dissolve partly and then chew the rest.

Will it make me jittery like coffee or energy drinks?

No. CircO2 has no caffeine or stimulants. The energy people feel comes from better circulation, not an artificial jolt.

I already feel fine. Can CircO2 still help me?

Keep up the good habits! Even so, the natural ability of your blood vessels to make nitric oxide declines with age. CircO2 is an easy daily way to support healthy circulation as you get older.

Does mouthwash or toothpaste affect it?

Strong antiseptic mouthwash can reduce the helpful bacteria on your tongue. You don't have to change your routine, though. Because CircO2 dissolves slowly in your mouth, it has time to mix with those bacteria and do its job.

Where can I buy CircO2?

CircO2 isn't sold in stores. The official website is the only place to get the real product with the full 90-day guarantee and current discounts.

Feel the CircO2 Difference Starting Tomorrow Morning

One small lozenge. Twenty minutes. A whole day of steady energy and healthy circulation. And you're protected by a full 90-day money-back guarantee.

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