Extract Ratios and “Dry Powder Equivalents”, Explained

What an extract is, before the ratio

Start with the thing itself. A herbal extract is what you get when you take dried plant material, soak it in a solvent — water, alcohol, or a mixture — and then remove the solvent, leaving behind a concentrated powder or liquid.

The point of doing this is that most of a dried plant is not the part anyone is interested in. It is cellulose, starch, fibre and water. The compounds that made the plant worth studying might be one or two per cent of its dry weight. Extraction concentrates those compounds and throws away the rest, which is why 100 mg of a good extract can be more useful than a gram of the raw powder.

That is the honest case for extracts, and it is a strong one. A well-made extract is a better product than a ground-up leaf. The trouble starts with how the concentration is described.

What a ratio does and does not say

An extract ratio is written as two numbers: 10:1, 4:1, 20:1. It means that the stated weight of dried plant material was used to produce one part of finished extract. A 10:1 extract took ten kilograms of herb to make one kilogram of powder.

Read that sentence again, because the important part is what it leaves out. The ratio describes the input. It says nothing about the output — how much of the compound anyone cares about actually ended up in the extract.

The gap is not academic. Two manufacturers can both produce a “10:1 green tea extract” and end up with powders differing several-fold in catechin content, depending on the solvent, the temperature, the part of the plant used, the growing conditions and how the extract was dried. Both labels are accurate. Neither tells you what you need.

This is why serious supplement labels print a different number entirely.

Standardisation, which is the number that matters

A standardised extract is one guaranteed to contain a stated percentage of a named compound. “Ashwagandha root extract, standardised to 5% withanolides.” “Green tea extract, standardised to 50% EGCG.” “Epimedium extract, standardised to 20% icariin.”

That single phrase does what a ratio cannot. It tells you what is in the powder rather than what went into making it, and it lets you compare a product directly with the research, because trials report their doses the same way.

1. Find the milligram amount

   How much extract is in a serving.

2. Find the standardisation

   What percentage of the active compound the extract carries.

3. Multiply

   600 mg at 5% withanolides is 30 mg of withanolides.

4. Compare with the trial

   Trials report the same two numbers. Now the comparison is like for like.

When a label prints a ratio instead of a standardisation, it is usually because a standardisation would be less flattering, or because the manufacturer buying the ingredient did not specify one. Neither is illegal. Both are worth noticing.

The Horse Boost panel prints no standardisation for anything, and no Latin names either, which compounds the problem for two of its ingredients: “catuaba” covers at least two unrelated plants, and “horny goat weed” covers several Epimedium species with different icariin content.

The 567 milligram footnote

Under the blend line, in the smallest type on the panel, Horse Boost prints this: “** equivalent to approximately 567 mg of dry powders”.

It is a dry-powder-equivalent claim. It says the 82 mg of extract in the blend stands in for roughly 567 mg of raw dried herb — an average ratio of about seven to one across the nine ingredients.

Before criticising it, give it credit. Most labels with a proprietary blend print no such footnote at all, and a buyer is left with a bare number and no context. This one at least attempts to say what the number represents. It is an argument, and arguments can be examined.

So examine it. Take the claim entirely at face value, ignore everything said above about ratios not equalling potency, and treat the blend as though it really were 567 mg of dried herb.

Split 567 mg nine ways and you get about 63 mg each. Ashwagandha is studied at 300 to 600 mg. Green tea extract at 250 to 500 mg. Maca at 1,500 to 3,000 mg. L-arginine at 3,000 to 6,000 mg.

The most generous possible reading of this label — the one the footnote itself invites — still lands below every benchmark, for every ingredient, by a wide margin. That is worth stating plainly, because it means the argument about extract ratios does not actually need to be won. It can be conceded, and the answer does not change.

There is one more thing the footnote quietly reveals. A seven-to-one average implies the ingredients are not all 10:1; some must be weaker concentrates, or whole powders at 1:1. Which ones, the label does not say. A buyer hoping the ashwagandha is the concentrated part and the filler-ish names are the dilute part has no way to check that hope, and the ordering rule points the other way: ashwagandha sits sixth of nine.

None of which makes the footnote dishonest. It makes it incomplete in the specific way this whole label is incomplete — it offers a number in place of the number that would settle the question.

Three things a ratio ignores

Beyond the input-versus-output problem, an extract ratio is silent on three variables that change what is in the jar. All three are printable in a line of text, and none of them appears on this panel.

The species point is the one with practical consequences here. Two of the nine ingredients on this panel are named only by a common name that covers more than one plant. A Latin name costs nothing to print and would settle it. Its absence means that even a buyer willing to research the ingredient cannot be sure which research applies.

This is also why the phrase “natural herbal extract” carries so little information. Natural describes where the material came from. It says nothing about which plant, which part, which process, or how much.

Read the Horse Boost panel for yourself, footnote and all.

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Where ratios genuinely help

It would be a poor article that left you thinking extract ratios are always a dodge. They are not, and knowing when they are useful is part of reading a label well.

The rule is simple enough. A ratio is useful as a supplement to a standardisation, and misleading as a substitute for one. When it appears alone on a product sold for a specific effect, it is doing a job that a percentage should be doing.

How to check any extract claim in two minutes

This works on any bottle, and it needs nothing but the label and a search box.

The bottom line

An extract ratio describes what went into a process. A standardisation describes what came out of it. Only the second one connects a product to the research that made its ingredients interesting.

The Horse Boost panel gives a blend total of 82 mg, no standardisation for anything, no Latin names, and a footnote saying the extract represents about 567 mg of dry powder.

Take the footnote seriously and the arithmetic still does not work: 567 mg divided by nine is about 63 mg each, against studied doses running from 300 mg to 6,000 mg. The footnote is the best argument this label has, and it is not enough.

Sources

1. U.S. Food and Drug Administration. Dietary Supplement Labeling Guide, Chapter IV: Nutrition Labeling. FDA guidance for industry. Checked September 24, 2026.
2. National Center for Complementary and Integrative Health. Ashwagandha. NCCIH, current page. Checked September 24, 2026.
3. National Center for Complementary and Integrative Health. Green Tea. NCCIH, current page. Checked September 24, 2026.
4. National Center for Complementary and Integrative Health. Maca. NCCIH, current page. Checked September 24, 2026.
5. Memorial Sloan Kettering Cancer Center. Epimedium / Horny Goat Weed (About Herbs). MSK integrative medicine database. Checked September 24, 2026.
6. U.S. Food and Drug Administration. Dietary Supplements: What You Need to Know. FDA, current revision. Checked September 24, 2026.