Ingredient group: fruit and seed extracts
Grape Seed Extract, Bilberry and Grapefruit Seed in Reviralis: What Is Inside
Grape seed extract is the tenth of 18 names in the Reviralis blend, so by label order it holds at most 66.1 mg, while studies used 100 to 300 mg a day. Bilberry (8th, at most 82.62 mg) and grapefruit seed extract (11th, at most 60.09 mg) are the other two fruit names. No amounts are printed.
Written by the Goreviralis label deskUpdated
The three names01
Which fruit and seed extracts are in Reviralis?
Three blend names come from fruit: bilberry fruit extract (8th), grape seed extract (10th) and grapefruit seed extract (11th).
The label prints no amount for them. It lists blend members from most to least by weight (21 CFR 101.36), so the order gives ceilings. Say you hold a fruit-stand receipt that lists three items in order but no weights: the first item is the heaviest, and that is all you can tell.
| Name | Place | At most | Studied |
|---|---|---|---|
| Bilberry fruit extract | 8 | 82.62 mg | About 80 to 480 mg a day |
| Grape seed extract | 10 | 66.1 mg | 100 to 300 mg a day |
| Grapefruit seed extract | 11 | 60.09 mg | No human dose set |
These are limits from arithmetic, not measured amounts. See the proprietary blend page for the full list.
Grape seed02
Does Reviralis contain a studied dose of grape seed extract?
Not by the label's own order. Studies give 100 to 300 mg a day, and NCCIH calls it generally well tolerated for short periods (NCCIH, Grape Seed Extract). Reviralis can hold at most 66.1 mg.
Even at its ceiling, the blend gives about two thirds of the low end of the studied range. It may also add to blood thinners, so ask a pharmacist if you take one. The bars show the gap.
Bilberry03
What does bilberry fruit extract do in a capsule?
Bilberry is a European blueberry relative rich in anthocyanin pigments, and studies of eye and circulation uses gave about 80 to 480 mg a day of extract.
Memorial Sloan Kettering notes it may add to blood thinners and lower blood sugar (MSK About Herbs, Bilberry Fruit). Its ceiling is 82.62 mg, which touches only the bottom of the studied range, and only if all other names shared the leftover weight.
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See packsGrapefruit seed04
Is grapefruit seed extract the same as grapefruit juice for medicine?
Not necessarily. Grapefruit juice changes how the body handles many medicines, but whether the seed extract does the same is not settled.
Memorial Sloan Kettering says human evidence is limited and that some tested products have carried added preservatives (Avula 2007, Synthetic Disinfectants in Grapefruit Seed Extract (Pharmazie)). The label's own pharmacist-check line covers prescription users, so show them the bottle.
"One name is grapefruit seed extract. Do any of my medicines warn against grapefruit?"
Care that has evidence05
Do fruit extracts help with herpes outbreaks?
No source we found says so, and a Cochrane review found no evidence that lysine or one other supplement prevents cold sores (Chi 2015, Cochrane: Preventing Cold Sores).
Herpes has no cure. Prescription antivirals such as acyclovir, valacyclovir and famciclovir are the care with evidence behind it (CDC, STI Treatment Guidelines: Herpes). Keep taking any prescribed medicine and do not change it without your prescriber. See a clinician for a diagnosis, because other conditions look like herpes. Call 911 for trouble breathing, a seizure, chest pain, swelling of the face or throat, or sudden confusion with severe headache and stiff neck.
| Name on the label | Bilberry (Vaccinium myrtillus) Fruit Extract |
|---|---|
| What it is | A European blueberry relative, rich in anthocyanin pigments |
| Place on the label | 8 of 18 in the 661 mg blend, most to least by weight |
| Amount per 2 capsules | not printed; the label order caps it at 82.62 mg of the 661 mg blend |
| Amount used in research | Eye and circulation studies used about 80 to 480 mg a day of extract |
| Strength of evidence | Weak for the uses studied; no outbreak data |
| Main caution | MSK notes it may add to blood thinners and may lower blood sugar. Ask a pharmacist if you take either kind of medicine. |
| Name on the label | Grape (Vitis vinifera) Seed Extract |
|---|---|
| What it is | An extract of grape seeds rich in proanthocyanidins |
| Place on the label | 10 of 18 in the 661 mg blend, most to least by weight |
| Amount per 2 capsules | not printed; the label order caps it at 66.1 mg of the 661 mg blend |
| Amount used in research | Studies usually give 100 to 300 mg a day |
| Strength of evidence | Modest results for other uses; no outbreak data |
| Main caution | NCCIH calls it well tolerated for short periods in studies. It may add to blood thinners, so ask a pharmacist. |
| Name on the label | Grapefruit (Citrus paradisi) Seed Extract |
|---|---|
| What it is | A liquid or powder made from grapefruit seeds and pulp, sold as a germ fighter |
| Place on the label | 11 of 18 in the 661 mg blend, most to least by weight |
| Amount per 2 capsules | not printed; the label order caps it at 60.09 mg of the 661 mg blend |
| Amount used in research | No human dose has been established for any health use |
| Strength of evidence | Lab claims; little human evidence; no outbreak data |
| Main caution | Grapefruit juice changes how the body handles many medicines; whether the seed extract does too is not settled. MSK also notes that tested commercial products have carried added preservatives. |
FAQ06
Questions about the fruit and seed extracts in Reviralis
How much grape seed extract is in Reviralis?
The label does not print it. Grape seed extract is tenth of 18 names, so by label order it holds at most 66.1 mg of the 661 mg blend. Studies used 100 to 300 mg a day.
Is grapefruit seed extract in Reviralis a problem with medicine?
The label does not say. Grapefruit juice affects many medicines, but information on the seed extract is limited. Show the bottle to your pharmacist if you take any prescription.
What is bilberry fruit extract in the Reviralis blend?
It is a European blueberry relative's extract, eighth in the blend, at most 82.62 mg by label order. Memorial Sloan Kettering says it may add to blood thinners and lower blood sugar.
Can grape seed extract be taken with blood thinners?
Ask a pharmacist first. Grape seed and bilberry may both add to blood thinners. Reviralis lists them eighth and tenth in the blend, with no printed amounts.
Why are no amounts printed for these extracts?
They sit inside a 661 mg proprietary blend, and US rules only require the blend total and the order of names. That is why this site gives ceilings, not contents.
Is there a trial of these extracts for herpes outbreaks?
No human outbreak trial for these three extracts was found. Memorial Sloan Kettering describes grapefruit seed evidence as limited, and we found no source showing a supplement treats herpes outbreaks.
Who wrote this07
Written and reviewed by
Pages built from the label, the sales page and linked NIH, CDC, 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 U.S. stocking partner for Reviralis. 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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