The label

What A 100:1 Extract Actually Means On A Label

Reviewed by Dr. Kambiz Tajkarimi, MD

The most misread number in this category, and this label prints two of them.

The two rows that carry a ratio

Five of the seven rows on the Horsewood panel are plain: a name, a plant part, and 20 mg. Two are not, and those two carry the most information and the most opportunity for misreading on the whole label.

• Tongkat Ali (Eurycoma Longifolia), 10 mg. Footnoted: from a 100:1 extract, equivalent to approximately 1,000 mg of dry tongkat ali powder.
• Horny Goat Weed (Epimedium sagittatum), 8 mg. Footnoted: from a 10:1 extract, equivalent to approximately 80 mg of dry horny goat weed powder.

Two numbers, two ratios, two stated equivalents. Most labels in this aisle print the first of those and none of the rest.

What a ratio actually describes

An extract ratio is a manufacturing statement. It says how much dried plant material went into the extraction to produce a given weight of extract.

A 100:1 extract means one hundred kilograms of dried root produced one kilogram of finished extract. Ninety-nine percent of the starting mass was solvent-removed plant matter: fibre, starch, water-soluble sugars, everything that did not carry through the extraction.

So the stated equivalent on this panel is arithmetic rather than a claim: 10 mg of a 100:1 extract was produced from about 1,000 mg of dry root. The label has shown its working, which is unusual and good.

Both rows tell you about the input. Neither tells you about the output, and the output is what a trial measures.

Why a ratio is not a standardisation

This is the distinction the whole article turns on, and it is the one that costs readers the most money across this aisle.

A ratio is about the input: how much plant went in. A standardisation is about the output: how much of a named compound is in the finished extract, usually expressed as a percentage. They answer different questions and only the second can be compared with a clinical trial.

Two 100:1 extracts of the same root, made by different processes, can contain very different quantities of the compound anyone cares about. The extraction solvent, the temperature, the plant material’s own growing conditions and the part used all move it. The review of tongkat ali chemistry covers how variable commercial material is, and the 2024 Epimedium review devotes a whole section to quality control for exactly this reason.

The tongkat ali row, and the unit problem

Tongkat ali is the strongest row on this panel. A 2022 systematic review and meta-analysis of clinical trials found a measurable rise in serum total testosterone in men, which is more than any other ingredient here can claim.

Now try to place this label’s row against that finding, and watch the units refuse to line up.

• The trials report a weight of standardised extract, typically a water extract at a stated daily amount. Tambi 2012 is a representative example of how that is described.
• This panel reports 10 mg of a 100:1 concentrate, plus a dry-powder equivalent of about 1,000 mg.
• Those are three different units: extract weight, concentrate weight, and raw-material equivalent.

A dry-powder equivalent is not interchangeable with a standardised extract weight. A reader who sees 1,000 mg on the panel and 200 to 400 mg in a trial summary may conclude the label is generous. A reader who sees 10 mg of actual extract may conclude the opposite. Neither conclusion is supported, because the panel does not publish the one figure that would settle it.

The honest statement is the narrow one: this row is a real concentrate of a real plant, disclosed with its ratio and its equivalent, and it cannot be matched to the meta-analysis because the label and the literature are not speaking the same units.

The horny goat weed row, and a smaller number than it looks

The second ratio row is 8 mg from a 10:1 extract, equivalent to about 80 mg of dry leaf.

Eighty milligrams of dried leaf is a very small amount of plant. For comparison, a culinary teaspoon of a dried herb runs to a gram or more. This is the smallest row on the panel however it is expressed.

The reason horny goat weed is on a men’s panel at all is icariin, which inhibits human PDE5 in a laboratory assay. That is a genuine finding about a purified molecule in glassware. The measured potency is a small fraction of a prescription inhibitor’s, the herb’s own human trial record is close to empty, and the panel does not say what percentage of this 8 mg is icariin.

Three unknowns stacked on one row. The label is not hiding them; it simply does not have room to answer them, and no label in this category does.

How to read a ratio on any label

Four questions, in order, and they work on every product in this aisle.

1. Is there a ratio at all? If a label says extract with no ratio and no standardisation, it has told you nothing about concentration.
2. Is there a standardisation percentage? This is the one that can be compared with a trial. If it is present, use it and ignore the rest.
3. Is the equivalent stated? A label that prints the ratio AND the dry-weight equivalent has shown its arithmetic, which is what this one does on both rows.
4. Which unit does the research use? Then compare like with like, or do not compare at all.

Applied to this panel: question one, yes on both rows. Question two, no on both rows. Question three, yes on both rows. Question four, mismatched. That is a better result than most labels produce and it still does not let you place either row against a trial.

And the five rows with no ratio at all

The other five rows on this panel read as a plain name and 20 mg: saw palmetto berry extract, wild yam root extract, sarsaparilla root extract, nettle leaf extract and boron amino acid chelate.

Four of those five say extract without saying how concentrated. That is a real gap and it cuts both ways: a 20 mg row could be a modest amount of a strong concentrate or a modest amount of a weak one, and a reader has no way to tell. It is the same missing information the ratio rows carry, without the partial disclosure that makes those two readable.

The fifth row is a different kind of gap

Boron amino acid chelate at 20 mg is not an extract at all. A chelate is a mineral bound to an amino acid carrier, and the 20 mg is the weight of the whole compound. The elemental boron inside it is a fraction of that, and the panel does not publish the fraction.

That matters more than it sounds. Boron is the one row here with a meaningful upper limit attached to it, and the trials that make it interesting to a men’s formula dosed elemental boron in single-digit milligrams. Without the elemental figure the row cannot be placed on that scale at all, and this website will not print an estimate in its place. It is check four on our own checklist and it is the check this product scores worst on.

The verdict

The two ratio rows on this panel are the most informative and the most easily misunderstood things on it. They tell you the extracts are real concentrates rather than dilutions, they show their arithmetic, and they stop short of the one figure that would let a reader check them against the research.

That is not a criticism of this label so much as a description of the whole category. Standardisation percentages are rare on retail panels and the reason is commercial: a percentage can be assayed and argued with, and a ratio cannot.

The practical advice is narrow and useful. Treat a stated dry-weight equivalent as evidence of disclosure, not as a dose. Compare rows with a standardisation percentage where you can find one. And read the row-by-row comparison on the ingredients page, where every Horsewood amount sits beside the amount its own research used.