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3.3.3 Temperature
Temperature has a significant influence on the stability of herbal drugs, which is very often unsuspected. Several enzymatic
breakdowns of the secondary metabolites of the plants take place faster in response to temperature elevation up to 45 °C.
Due to an elevation in the temperature, essential oil-bearing plants lose volatile constituents. Absorbent cotton wools, when
subjected to elevated temperature, undergo degradation and may become nonabsorbent due to the effect of temperature.
Herbal medicinal products that require storage conditions that are different from normal room temperature should be la-
beled accordingly (cold temperature, cool temperature, freezer, etc.).
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