Milay and colleagues tracked cannabinoid and terpenoid profiles for a year in whole and ground cannabis flower and in extracts stored in the dark. The work illustrates why a product’s condition when tested can differ from its condition when collected.
What changed in the experiment
Among the tested temperatures, 25 °C produced the largest changes in native cannabinoid concentrations. Terpenoids declined under all tested storage conditions, with grinding and very low temperatures among the least favorable conditions for preserving them. The best-performing extract vehicle in this experiment was olive oil.
How to use a later test in a product dispute
Document the form of the sample, whether it was ground, the storage temperature and duration, and the original and later analytical methods. Separate an observed difference from its possible explanations, such as storage, subsampling, or analytical variation. The study can inform which explanations deserve investigation. Its data offer no general correction for back-calculating the composition of an uncharacterized product.
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