Four plant names
Green Tea Leaf Extract Capsule, Grape Seed and Bilberry in Reviralis: Ceilings and Cautions
Green tea leaf extract can make up at most 165.3 mg of the 661 mg Reviralis blend, which is too little to reach the 800 mg of EGCG tied to raised liver enzymes. Grape seed extract is at most 66.1 mg, bilberry fruit extract at most 82.7 mg and olive leaf powder at most 55.1 mg. The label prints no single amount for any of them.
Written by the Reviralis label deskUpdated
The four names01
How much green tea leaf extract is in a Reviralis capsule?
At most 165.3 mg per serving of two capsules, and that is the whole extract, not just EGCG. 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).
Green tea is fourth in the list, so 661 divided by 4 sets its ceiling. Bilberry is eighth (at most 82.7 mg), grape seed tenth (66.1 mg) and olive leaf twelfth (55.1 mg). These are arithmetic ceilings, never measured amounts. Real amounts can be lower.
| Name | Place of 18 | Ceiling |
|---|---|---|
| Green tea leaf extract | 4 | At most 165.3 mg |
| Bilberry fruit extract | 8 | At most 82.7 mg |
| Grape seed extract | 10 | At most 66.1 mg |
| Olive leaf powder | 12 | At most 55.1 mg |
Name by name02
What do studies say about each plant extract?
They say little about this product. No study tested the blend, and none covers herpes.
Green tea leaf extract
Liver injury is uncommon but reported, mostly with capsule extracts, and 5% to 15% of Americans carry a gene variant that may raise the risk (NCCIH, Green Tea). EGCG at 800 mg a day went with raised liver enzymes (MSK About Herbs, Green Tea). The ceiling here cannot reach that, yet liver injury does not follow dose in a predictable way. Green tea also holds caffeine and lowers blood levels of nadolol and atorvastatin.
Bilberry fruit extract
Evidence for vision is mixed, and we found nothing on viruses. Bilberry may raise bleeding risk with warfarin, aspirin or NSAIDs (MSK About Herbs, Bilberry Fruit).
Grape seed extract
Pooled trials found lower diastolic but not systolic blood pressure. It is generally well tolerated; ask a clinician if you take blood pressure medicine (NCCIH, Grape Seed Extract).
Olive leaf powder
Olive leaf can lower blood pressure in animal and human studies. Effects on infection are laboratory-only. It may add to blood pressure and glucose-lowering medicines (MSK About Herbs, Olive Leaf).
Where they fall03
How much of the 661 mg can each name hold?
The order caps each name. The bars show where all 18 names can fall inside 661 mg.
661 mgone proprietary blend per serving (2 capsules), shared by 18 names; the 22 vitamin and mineral lines print their own amounts
Proprietary Blend 661 mg · 18 names · no single amounts- 1. DMAE bitartrate36.7 to 661 mg
- 2. L-glutamineup to 330.5 mg
- 3. Glutamic acidup to 220.4 mg
- 4. Green tea leaf extractup to 165.3 mg
- 5. Bacopa monnieri extractup to 132.2 mg
- 6. Inositolup to 110.2 mg
- 7. N-acetyl L-tyrosineup to 94.5 mg
- 8. Bilberry fruit extractup to 82.7 mg
- 9. GABAup to 73.5 mg
- 10. Grape seed extractup to 66.1 mg
- 11. Grapefruit seed extractup to 60.1 mg
- 12. Olive leaf powderup to 55.1 mg
- 13. Cinnamon bark extractup to 50.9 mg
- 14. Licorice root extractup to 47.3 mg
- 15. Boron (citrate)up to 44.1 mg
- 16. DHAup to 41.4 mg
- 17. Vanadyl sulfateup to 38.9 mg
- 18. Phosphatidylserineup to 36.8 mg
Bars are drawn on a 0 to 661 mg scale. Each bar shows the widest range the label order allows for that name (21 CFR 101.36, Supplement Facts Panel); the real split is not printed. The first name is at least 36.7 mg; the n-th is at most 661 divided by n.
The claim04
Is Reviralis really stimulant-free if it has green tea?
Not by plain reading. The sales page says "Non-GMO, stimulant-free, and 100% natural", yet green tea extract contains caffeine (NCCIH, Green Tea).
We cannot say how much caffeine is in the capsule, because the label prints no amount. The label does not print those three claims. "Natural" is not a defined safety term, and the capsule shell is cellulose (FDA, Questions and Answers on Dietary Supplements).
The label says to take two capsules 20 to 30 minutes before a meal. Memorial Sloan Kettering advises green tea extract with food. Ask a pharmacist which suits you (MSK About Herbs, Green Tea).
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 green tea or grape seed 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). Keep any antiviral you take. Do not skip a dose because you started a supplement.
Fact tables06
How do the four names compare in detail?
Each table lists place, research amount, evidence and caution.
| Name on the label | Green Tea (Camellia sinensis) Leaf Extract |
|---|---|
| What it is | Leaf extract of Camellia sinensis |
| Place on the label | 4 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 165.3 mg of the 661 mg blend |
| Amount used in research | EGCG 800 mg a day went with raised liver enzymes |
| Strength of evidence | The label ceiling is 165.3 mg of whole extract, so EGCG alone cannot reach 800 mg; liver injury is still not predictable by dose |
| Main caution | Rare liver injury, mostly from capsule extracts; contains caffeine; lowers blood levels of nadolol and atorvastatin |
| Name on the label | Bilberry (Vaccinium myrtillus) Fruit Extract |
|---|---|
| What it is | Extract of the European blueberry relative Vaccinium myrtillus |
| Place on the label | 8 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 82.7 mg of the 661 mg blend |
| Amount used in research | No dose cited |
| Strength of evidence | Mixed evidence for vision; nothing on viruses |
| Main caution | May raise bleeding risk with warfarin, aspirin or NSAIDs |
| Name on the label | Grape (Vitis vinifera) Seed Extract |
|---|---|
| What it is | Extract of grape seeds (Vitis vinifera) |
| Place on the label | 10 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 66.1 mg of the 661 mg blend |
| Amount used in research | No dose cited |
| Strength of evidence | Pooled trials found lower diastolic but not systolic blood pressure; generally well tolerated |
| Main caution | Ask a clinician if you take blood pressure medicine |
| Name on the label | Olive (Olea europaea) Leaf powder |
|---|---|
| What it is | Powdered olive leaf |
| Place on the label | 12 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 55.1 mg of the 661 mg blend |
| Amount used in research | No dose cited |
| Strength of evidence | Can lower blood pressure in animal and human studies; effects on infection are laboratory-only |
| Main caution | May add to blood-pressure and glucose-lowering medicines |
Keep reading07
Which group comes next?
Next are licorice, cinnamon and grapefruit seed. See the proprietary blend page and all 40 names.
FAQ08
Questions about green tea, grape seed and bilberry in Reviralis
Is the green tea in Reviralis safe for the liver?
Liver injury from green tea extract is uncommon but reported, mostly with capsule extracts, and it does not follow dose predictably. Avoid it with liver problems unless a clinician agrees. The label also warns about medical conditions.
Does Reviralis contain caffeine?
It contains green tea leaf extract, which holds caffeine. The label prints no caffeine amount, so we cannot give one. The ceiling for the whole extract is 165.3 mg per serving.
How much grape seed extract is in Reviralis?
At most 66.1 mg per serving, since it is tenth of 18 names in the 661 mg blend. The label prints no single amount, so the real figure may be lower.
Can bilberry interact with blood thinners?
It may. Bilberry may raise bleeding risk with warfarin, aspirin or NSAIDs. Vitamin E in the same capsule adds to the reason to ask a clinician first.
Does olive leaf lower blood pressure?
It can in animal and human studies, and it may add to blood pressure and glucose-lowering medicines. Effects on infection are laboratory-only. Ask a clinician if you take such medicine.
Does green tea interact with medicine?
Yes. Green tea lowers blood levels of nadolol and atorvastatin. It also holds caffeine. Tell a pharmacist about every supplement alongside your prescriptions.
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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