CircO2
A fast-dissolving oral tablet positioned for nitric-oxide support, with vitamin C, methylcobalamin B12, magnesium, and a 420 mg beet root, hawthorn, L-citrulline, and sodium nitrite blend.
Key ingredients
Vitamin C, Vitamin B12
Form
unknown
Quality testing
Not verified
Vitasor editorial verdict
Our role is to clarify where this product may fit, what remains uncertain, and which tradeoffs deserve attention before purchase.
Why we selected it
A label-complete oral-dissolving nitric-oxide support product for adults who prefer a lozenge-style format and can review blood-pressure and medication fit before use.
CircO2 is an Advanced Bionutritionals dietary supplement designed to dissolve in the mouth rather than be swallowed like a standard capsule. The label verifies vitamin C, vitamin B12, magnesium, and a proprietary 420 mg nitric oxide blend containing beet root powder, hawthorn berry extract, L-citrulline, and sodium nitrite per tablet. Vitasor positions it as a circulation and healthy-aging supplement comparison, not as treatment for high or low blood pressure, cardiovascular disease, erectile dysfunction, cognitive symptoms, or fatigue.
Key strengths
- Fast-dissolving oral format rather than a standard swallowed capsule
- Label-verified vitamin C, methylcobalamin B12, magnesium, and 420 mg proprietary blend
- Blend names beet root powder, hawthorn berry extract, L-citrulline, and sodium nitrite
- 30 tablets per box with one tablet per label serving
Main limitations
- People with low blood pressure unless a physician approves use
- People using nitrates, blood-pressure medication, PDE5 inhibitors, anticoagulants, or other relevant products without professional review
- Anyone seeking treatment for hypertension, cardiovascular disease, erectile dysfunction, cognitive symptoms, or persistent fatigue
- Pregnant or breastfeeding people without clinician guidance
Who this product may suit
Best for
- Adults comparing beet, L-citrulline, and nitrate-based nitric-oxide supplements
- Users who prefer a tablet that dissolves in the mouth
- Healthy-aging readers researching circulation-support routines
- People whose clinician or pharmacist has confirmed compatibility with their blood pressure and medicines
Probably not for
- People with low blood pressure unless a physician approves use
- People using nitrates, blood-pressure medication, PDE5 inhibitors, anticoagulants, or other relevant products without professional review
- Anyone seeking treatment for hypertension, cardiovascular disease, erectile dysfunction, cognitive symptoms, or persistent fatigue
- Pregnant or breastfeeding people without clinician guidance
Ingredients, dosage, and quality
The label matters more than the promise. Review ingredient amounts, delivery form, suggested use, and available quality verification.
- Form
- unknown
- Serving size
- 1 tablet
- Third-party testing
- Not verified
| Ingredient | Amount | Role / form |
|---|---|---|
| Vitamin C | 100 mg | Magnesium ascorbate and ascorbic acid |
| Vitamin B12 | 1,000 mcg | Methylcobalamin |
| Magnesium | 4 mg | Magnesium ascorbate |
| Proprietary Nitric Oxide Blend | 420 mg | Beet root powder (Beta vulgaris), hawthorn berry extract (Crataegus laevigata), L-citrulline, and sodium nitrite |
Suggested use
Allow the tablet to dissolve in the mouth. The archived FAQ suggests twice daily for the first week or two, then trying one tablet in the morning; verify current package directions.
Quality context
No quality certifications have been verified.
Safety boundaries
Supplement safety depends on dose, medication use, health conditions, pregnancy status, and the accuracy of the product label.
Contraindications and cautions
- Low blood pressure without physician approval
- Nitrate, blood-pressure, PDE5-inhibitor, anticoagulant, or other relevant medication use without clinician or pharmacist review
- Cardiovascular conditions or planned surgery without professional review
- Pregnancy or breastfeeding without clinician guidance
Allergen and pregnancy notes
Evidence, claims, and safety context
Evidence for a category is not automatically evidence for every branded product. We separate supported category-level claims from claims that require caution.
- Evidence level
- Mixed
- Claim risk
- high
- Review standard
- Enhanced review
What may be supported
- Provides a label-verified 420 mg blend containing beet root, hawthorn, L-citrulline, and sodium nitrite
- Designed as a tablet that dissolves in the mouth
- May be compared as a nitric-oxide and circulation-support supplement after safety review
Claims to treat cautiously
- Treats high blood pressure, low blood pressure, cardiovascular disease, erectile dysfunction, cognitive impairment, or fatigue
- Raises nitric oxide by a guaranteed percentage or within a guaranteed time
- Guarantees energy, circulation, memory, stamina, sexual performance, heart health, or healthy-aging outcomes
- Has no downside, is safe for everyone, or replaces cardiovascular evaluation or medication
Safety notes
- The vendor specifically advises people with low blood pressure to consult a physician before use.
- Because the blend includes nitrate and circulation-related ingredients, review compatibility with nitrates, blood-pressure medicines, PDE5 inhibitors, anticoagulants, and cardiovascular conditions.
- Chest pain, fainting, severe shortness of breath, or acute neurological symptoms require urgent medical care.
Frequently asked questions
How is CircO2 taken?
The archived FAQ says to let the tablet dissolve completely in the mouth, although it may be chewed after partially dissolving. It suggests twice daily for the first week or two and then trying once in the morning; verify the current package directions before use.
What is in the proprietary blend?
The label lists 420 mg total of beet root powder, hawthorn berry extract, L-citrulline, and sodium nitrite. It does not disclose the individual amount of each component.
Who should ask a clinician before using CircO2?
The source specifically advises people with low blood pressure to consult a physician. Medication use, cardiovascular conditions, pregnancy, breastfeeding, or planned surgery also warrant professional review.
What is the guarantee?
The archived offer states a 90-day down-to-the-last-lozenge satisfaction guarantee. It says empty boxes may be returned and that the customer pays return shipping; verify current terms at checkout.
Sources used for this product dossier
Product information was last updated 2026-07-28. Vendor sources establish product facts; they do not independently validate efficacy claims.
Advanced Bionutritionals
Accessed 2026-07-28
Advanced Bionutritionals
Accessed 2026-07-28
Advanced Bionutritionals
Accessed 2026-07-28
Vitasor
Accessed 2026-07-28