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Why Blend Amounts Stay Hidden on Supplement Labels, and What a Buyer Loses
Supplements hide blend amounts because the law lets a company print one total for a group of names. Companies often say this protects a formula, though we cannot verify any single motive. The cost falls on the buyer: with Reviralis, 661 mg is shared by 18 names, so no one can tell what any single name adds.
Written by the Reviralis label deskUpdated · 4 min read
The reasons01
Why do supplements hide blend amounts?
Because the rules allow it. A company may list the names in a blend in order of weight and print only the blend's total (21 CFR 101.36, Supplement Facts Panel).
The reasons companies give are usually these: the mix is a trade secret, a copycat could match it, and a short panel reads more cleanly. We cannot check any of them for a given brand, and the Reviralis label gives no reason of its own.
A fair reading is that a blend is a legal choice and not a sign of anything wrong. It is also a choice that moves work from the seller to the reader.
The cost02
What does a hidden amount cost the buyer?
It costs the ability to check. With no single amount, you cannot hold a name up against the dose used in a study.
Take bacopa on the Reviralis panel. It is fifth of 18, so it can weigh at most 132.2 mg per serving. One cited 12-week trial used 300 mg a day (Calabrese 2008, Bacopa in Older Adults (J Altern Complement Med)). The label cannot tell you whether the real number is 20 mg or 130 mg.
| Question you may have | Vitamin line (amount printed) | Blend name (total only) |
|---|---|---|
| Compare with a study dose | Yes | Only a ceiling |
| Compare with an upper limit | Yes, for most | No |
| Add up with another product | Yes | No |
| Tell if a name is a trace or a main part | Yes | No |
What to ask03
What can a buyer ask the seller about a blend?
Ask for the amount of each name in writing. A seller who knows the formula can answer, and a clear answer is worth more than any claim on the front.
- How many milligrams of each named ingredient are in one serving?
- Which plant part and which extract strength is each botanical?
- For boron and vanadyl sulfate, how much of the weight is the element itself?
- Is the licorice root extract stripped of its glycyrrhizin?
- Can you send the lab report behind the lot on my bottle?
The order desk contact is on the contact page. Treat an unanswered question as information too.
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 packsWhat is not known04
Does a hidden blend mean the capsule is underdosed?
No, and we do not say so. A hidden amount is unknown, not small. The label simply does not show it.
What we can say is the arithmetic: the last name in the Reviralis blend can hold at most 36.8 mg, and the first at least 36.7 mg (21 CFR 101.36, Supplement Facts Panel). The proprietary blend page sets out all 18 ceilings, and the blend math guide shows how to work them out yourself.
Reviralis Complete is a dietary supplement. It is not an antiviral and no source shows it prevents or reduces herpes outbreaks. If a clinician prescribed an antiviral, keep taking it.
FAQ05
Reviralis questions people ask
Is a proprietary blend legal?
Yes. Federal rules allow a blend to be listed with one total and the names in descending order by weight (21 CFR 101.36, Supplement Facts Panel). Legal does not mean fully informative, because the single amounts stay unknown to the reader.
Does a blend hide a bad ingredient?
Not by itself. Every name in a blend must still appear on the panel, so the Reviralis label shows all 18. What stays hidden is how much of each, not which ones. Allergen and caution lines are separate parts of the label.
Are vitamin lines ever hidden in a blend?
Not on this label. The 22 vitamin and mineral lines each print an amount and a percent Daily Value. Only the 18 names in the Proprietary Blend share one total, 661 mg per serving of two capsules.
How can I compare two supplements with blends?
Compare the blend totals, the number of names and the order of names. A larger total shared by fewer names allows larger amounts per name. Without single amounts, the comparison only works as ceilings, not as real doses.
Who wrote this06
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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