Clinical knowledge archive
Botanical Standardization: Why Plant Part, Ratio and Marker Matter
A standardized extract states the plant part and a measured marker compound, which is the closest a herb gets to a fixed dose; Nerve Honey's label prints one extract ratio (prickly pear 20:1), names two plant parts and gives no marker amounts.
Updated November 6, 2026Sources linked below
Three ways to describe a herb on a label
A botanical line can tell you very little or quite a lot. Compare three ways of writing the same 145 mg of passionflower:
| Label wording | What you learn |
|---|---|
| Passionflower 145 mg | The weight of material. Not the part, not whether it is powder or extract. |
| Passionflower aerial parts 4:1 extract 145 mg | The part and roughly how concentrated it is, about 580 mg of starting herb. |
| Passionflower aerial parts extract 145 mg, standardized to 3.5% vitexin | The part, plus about 5 mg of a measured marker compound in every serving. |
Nerve Honey's passionflower line is the first kind. Federal labeling rules ask each botanical to name the part used[1], and three of its five lines do not.
Ratios: useful, but not a potency guarantee
A drug-to-extract ratio such as the prickly pear's 20:1 says about 20 grams of raw plant went into each gram of extract. It tells you how much plant was processed, not how much active compound survived. Two 20:1 extracts made with different solvents can differ several-fold in what they contain, and the label does not say whether fruit, pad or flower was used[2].
Markers: the closest thing to a dose
Standardizing to a marker compound means the maker measures one known constituent and adjusts each batch to hit a target. It is the closest a herbal product gets to a drug's fixed dose, and it is how most clinical trials specify what they gave. Regulators use the same idea: the EU passionflower monograph defines its preparations by herb type and extraction method[3], and reviews of passionflower trials note that inconsistent preparations make results hard to compare[4].
Why this matters for Nerve Honey
- Passionflower: the trial doses (260 mg and 500 mg) were defined extracts. Without knowing what Nerve Honey's 145 mg is, you cannot compare.
- Corydalis: its pain chemistry and its liver warning both trace to alkaloids such as tetrahydropalmatine. A marker figure would tell you how much you are taking.
- California poppy: research focuses on alkaloids from the flowering herb. The label uses seed, a different tissue.
Questions to put to the seller
- Which plant part is used for passionflower, corydalis and prickly pear?
- Is the passionflower a powder or an extract, and at what ratio?
- Is any ingredient standardized to a marker compound, and to how much?
- Does the certificate of analysis for my lot confirm identity for all five herbs?
Email them to [email protected]. The quality standards page has a ready-to-send template.
Sources
- 1Electronic Code of Federal Regulations. 21 CFR 101.36: Nutrition labeling of dietary supplements.
- 2Valero-Galván J, González-Fernández R, Sigala-Hernández A, et al. Sensory attributes, physicochemical and antioxidant characteristics, and protein profile of wild prickly pear fruits (O. macrocentra, O. phaeacantha, O. engelmannii) and commercial prickly pear fruits (O. ficus-indica). Food Res Int. 2021;140:109909.
- 3European Medicines Agency, Committee on Herbal Medicinal Products. Passiflorae herba (passion flower): herbal medicine overview and monograph.
- 4Miroddi M, Calapai G, Navarra M, Minciullo PL, Gangemi S. Passiflora incarnata L.: ethnopharmacology, clinical application, safety and evaluation of clinical trials. J Ethnopharmacol. 2013;150(3):791-804.