The Cissus Ketosterone Assay: What the Number Measures and Why It Moves

Single-Compound Markers Versus Class Markers

Standardisation markers come in two shapes, and the difference determines how much you can trust a percentage.

Ketosterones sit firmly in the right-hand column. The term describes ketone-bearing steroidal constituents of the plant as a group, and there is no single universally agreed reference standard against which every laboratory calibrates.

Where the Variation Comes From

Three sources, compounding:

1. What counts as a ketosterone

A class definition has boundaries, and different methods draw them differently. A broader response includes more constituents and produces a higher number on identical material.

2. What the method calibrates against

Class assays are calibrated against a chosen standard and results expressed as equivalents of it. Change the calibration standard and the number changes, without anything in the sample changing.

3. Detection approach

Colorimetric and UV-based approaches respond to a wider set of interfering constituents than a chromatographic separation does. Extract matrices are complex, and the more selective the technique, the lower and more specific the figure tends to be.

Why This Matters Commercially

Three practical consequences, all of which we see in buyer conversations:

1. Price comparison breaks. A cheaper 5% may be a broader method rather than a weaker material — or it may be genuinely weaker. Without methods, you cannot tell which.
2. Supplier switching produces surprises. A formulation built on one supplier's 5% may behave differently on another's, with nothing on either document explaining it.
3. Third-party verification produces arguments. A buyer's laboratory using a third method matches neither certificate, and everybody suspects everybody.

All three dissolve once the method is stated.

What We Do

Two things, deliberately modest:

Declare the method

Every SV Botanica cissus certificate names the assay method beside the figure. We are not claiming our method is the correct one — we are making the number interpretable, which is the part that actually helps a buyer.

Report a supporting HPLC profile

Alongside the ketosterone assay we report constituents that are analytically well-defined in this plant:

• Quercetin and flavonoids — well characterised, straightforward by HPLC;
• β-sitosterol and phytosterols;
• Triterpenoids of the stem.

This gives a characterisation of the material that does not depend on the class assay at all — and, usefully, one that crude sterol addition distorts rather than flatters.

The Spiking Question

A class-based assay has a structural vulnerability worth naming: if the measurement responds to a class, then adding cheap material from that class raises the number.

Inexpensive plant sterols are readily available. A single-compound marker resists this — you would have to add the actual named molecule. A class marker does not resist it nearly as well.

The HPLC profile is the practical defence, because added sterol material shifts the pattern: ratios between constituents move in ways that authentic material does not. A number can be lifted; a fingerprint is harder to counterfeit.

What to Ask For

1. The ketosterone assay method, named on the certificate;
2. The calibration standard used, if your laboratory needs to reproduce it;
3. A supporting HPLC profile — flavonoids, quercetin, phytosterols;
4. For sports nutrition, banned-substance screening;
5. If you are comparing suppliers, one laboratory, one method, both samples — the only comparison that means anything.

A Closing Note on Honesty

It would be commercially easier to quote a headline percentage and let buyers assume more precision than the assay supports. We would rather explain the limitation, because a buyer who understands why the number moves is a buyer who will not be surprised later — and because the alternative is participating in a comparison we know to be unsound.

See the full cissus specification or request a sample with the method stated.