Three blend names
Licorice Root Extract Supplement, Cinnamon Bark and Grapefruit Seed Extract in Reviralis
Licorice root extract supplement amounts are not printed on Reviralis; the blend order caps it at 47.3 mg of the 661 mg. Cinnamon bark extract is at most 50.9 mg and grapefruit seed extract at most 60.1 mg. Licorice carries the sharpest caution here: its compound glycyrrhizin can raise blood pressure and lower potassium, and the label does not give its content.
Written by the Reviralis label deskUpdated
The three names01
How much licorice root extract is in Reviralis?
At most 47.3 mg per serving of two capsules, and the real amount may be lower. The label prints only the 661 mg blend total for 18 names, listed from most to least by weight (21 CFR 101.36, Supplement Facts Panel).
Q: Why a ceiling and not an amount? A: Federal rules let a blend list its names by weight without giving each one (21 CFR 101.36, Supplement Facts Panel). Licorice is fourteenth, so 661 divided by 14 sets its ceiling. Grapefruit seed is eleventh and cinnamon thirteenth.
| Name | Place of 18 | Ceiling |
|---|---|---|
| Grapefruit seed extract | 11 | At most 60.1 mg |
| Cinnamon bark extract | 13 | At most 50.9 mg |
| Licorice root extract | 14 | At most 47.3 mg |
The main caution02
Can licorice root extract raise blood pressure?
Yes, it can. Source pages warn that the compound glycyrrhizin can raise blood pressure, lower potassium and, rarely, disturb the heartbeat (NCCIH, Licorice Root) (MSK About Herbs, Licorice).
The warning covers even small amounts in people with high blood pressure, heart or kidney disease, or a high salt intake. Memorial Sloan Kettering says to avoid licorice with diuretics and blood pressure medicine, and the pregnancy warning is stronger still (NCCIH, Licorice Root) (MSK About Herbs, Licorice).
The label does not say whether the extract is deglycyrrhizinated, and we do not assume either way. No source shows a safe dose for this product.
Name by name03
What do studies say about each of the three?
Little, and none of it tests this product.
Grapefruit seed extract
Lab surveys in 2007 of liquid products found synthetic preservatives: benzethonium chloride at 0.29% to 21.84% and some triclosan. A case report tied an INR of 7.9 on warfarin to a product with no real extract (Avula 2007, Synthetic Disinfectants in Grapefruit Seed Extract (Pharmazie)). Nobody has tested this product, so we call it neither clean nor adulterated.
Cinnamon bark extract
Research does not clearly support any condition. Cassia cinnamon holds coumarin, a liver concern at high doses in sensitive people. Check the species on your bottle (NCCIH, Cinnamon).
Licorice root extract
Licorice may also interact with MAOIs and affect warfarin clearance; the clinical weight is not known (MSK About Herbs, Licorice). Pregnancy is the clearest stop.
Check yourself04
Should you ask a clinician before taking Reviralis?
If any of five questions fits you, yes. The licorice line alone is a reason for anyone on blood pressure medicine.
Reviralis: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsThe evidence05
Do these three reinforce natural defenses?
No cited source shows that they prevent or reduce herpes outbreaks. "Reinforces your body's natural defenses" is the sales page's wording.
Herpes has no cure, and prescribed antivirals are the proven care (CDC, About Genital Herpes) (CDC, STI Treatment Guidelines: Herpes). A supplement sold for a named disease is treated as a drug by FDA (FDA, Questions and Answers on Dietary Supplements). Keep your prescription.
Fact tables06
How do the three names compare in detail?
Each table lists place, research amount, evidence and caution.
| Name on the label | Grapefruit (Citrus paradisi) Seed Extract |
|---|---|
| What it is | Extract of grapefruit seeds (Citrus paradisi) |
| Place on the label | 11 of 18 in the 661 mg blend, most to least by weight |
| Amount per serving (2 capsules) | not printed; the label order caps it at 60.1 mg of the 661 mg blend |
| Amount used in research | No dose cited |
| Strength of evidence | 2007 lab surveys of liquid products found synthetic preservatives; nobody has tested this product |
| Main caution | A case report tied a very high INR on warfarin to a product with no real extract |
| Name on the label | Cinnamon (Cinnamomum cassia) Bark Extract |
|---|---|
| What it is | Extract of cassia cinnamon bark |
| Place on the label | 13 of 18 in the 661 mg blend, most to least by weight |
| Amount per serving (2 capsules) | not printed; the label order caps it at 50.9 mg of the 661 mg blend |
| Amount used in research | No dose cited; the species is not printed |
| Strength of evidence | Research does not clearly support any condition |
| Main caution | Cassia cinnamon contains coumarin, a liver concern at high doses in sensitive people |
| Name on the label | Licorice (Glycyrrhiza glabra) Root Extract |
|---|---|
| What it is | Extract of licorice root (Glycyrrhiza glabra) |
| Place on the label | 14 of 18 in the 661 mg blend, most to least by weight |
| Amount per serving (2 capsules) | not printed; the label order caps it at 47.3 mg of the 661 mg blend |
| Amount used in research | No dose cited; glycyrrhizin content is not printed |
| Strength of evidence | Source pages warn about the compound glycyrrhizin; no source shows a safe dose for this product |
| Main caution | Raised blood pressure, low potassium and rarely irregular heartbeat; avoid with diuretics and blood-pressure medicine; not for pregnancy |
Keep reading07
Which group comes next?
Next are DHA, boron and vanadyl sulfate. See all 40 names.
FAQ08
Questions about licorice, cinnamon and grapefruit seed in Reviralis
Is licorice safe with blood pressure medicine?
Not without asking. Licorice can raise blood pressure and lower potassium, and sources advise avoiding it with diuretics and blood pressure medicine. Ask a pharmacist before you take Reviralis if you use either.
Is Reviralis safe in pregnancy?
The label tells you to ask a healthcare provider if you are pregnant or nursing. Licorice is a pregnancy concern in the source pages, so do not start it without that advice.
Is the licorice in Reviralis deglycyrrhizinated?
The label does not say. We do not assume either way, and the glycyrrhizin content is not printed. The licorice ceiling is 47.3 mg of extract per serving.
What species of cinnamon is in Reviralis?
Check your bottle's label. Cassia cinnamon contains coumarin, a liver concern at high doses in sensitive people. Research does not clearly support cinnamon for any condition.
Is grapefruit seed extract the same as grapefruit juice?
No. Grapefruit seed extract is made from the seeds. Lab surveys of liquid seed products found synthetic preservatives, and one case report tied a high INR on warfarin to a product with no real extract.
How much grapefruit seed extract is in Reviralis?
At most 60.1 mg per serving, since it is eleventh of 18 blend names. The label prints no single amount, so the real figure may be lower.
Who wrote this09
Written and reviewed by
Pages built from the label, the order page and linked NIH, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized Reviralis Retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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