Some families are accustomed to buying valuable medicinal herbs or some of the commonly used Chinese herbal medicines for storage after being bought for use. For example, Tianma, Panax pseudoginseng, and other types of herbal supplements are released for several years. After long-term storage of Chinese herbal medicine, does it affect the quality of the medicine? Chinese herbalists have proved through practice that most Chinese herbal medicines maintain their quality and efficacy if they are stored properly for a certain period of time. However, there are other Chinese herbal medicines that, after storage, have no appearance of mycotic dysplasia, but their curative effect is reduced. This shows that the internal quality of Chinese medicine has changed.
During the storage process, there are a number of medicinal herbs, in addition to the external air, water, sunlight, temperature, microbes and other factors, it itself will also produce a series of chemical changes, constantly changing the ingredients. For example, hollyhine, Polygonum cuspidatum, etc. contain a large amount of tannins, which can be continuously oxidized under the action of enzymes and polymerized to form other substances, thereby reducing the efficacy. Another example is Boziren, peach kernel, Yu Liren, Chinese angelica, gardenia, etc. They contain a lot of fatty oil, sticky sugar and other ingredients, these herbs are easy to "go oil." In addition, peppermint, perrin, musk, sandalwood, orange peel and other volatile ingredients containing herbs, stored for too long, because the aroma does not affect the quality and reduce efficacy. On the contrary, there are also some herbs that need to be stored for a certain period of time so that their components can be naturally decomposed to reduce their toxicity, or to make them volatile and “obscene.†Such as frankincense, myrrh, ejiao and other varieties of gum and dried tangerine peel.
In short, the length of storage time of Chinese herbal medicine can not be generalized. It depends on the nature of various medicinal materials and storage conditions. However, from the perspective of safe and effective medication, it should not be too long. Herbs (including leaves and flowers) generally do not exceed two years; woody plants (including roots, stems, and skins) do not exceed 3 years; fruits and seeds do not exceed 4 years; minerals do not exceed 10 years.
During the storage process, there are a number of medicinal herbs, in addition to the external air, water, sunlight, temperature, microbes and other factors, it itself will also produce a series of chemical changes, constantly changing the ingredients. For example, hollyhine, Polygonum cuspidatum, etc. contain a large amount of tannins, which can be continuously oxidized under the action of enzymes and polymerized to form other substances, thereby reducing the efficacy. Another example is Boziren, peach kernel, Yu Liren, Chinese angelica, gardenia, etc. They contain a lot of fatty oil, sticky sugar and other ingredients, these herbs are easy to "go oil." In addition, peppermint, perrin, musk, sandalwood, orange peel and other volatile ingredients containing herbs, stored for too long, because the aroma does not affect the quality and reduce efficacy. On the contrary, there are also some herbs that need to be stored for a certain period of time so that their components can be naturally decomposed to reduce their toxicity, or to make them volatile and “obscene.†Such as frankincense, myrrh, ejiao and other varieties of gum and dried tangerine peel.
In short, the length of storage time of Chinese herbal medicine can not be generalized. It depends on the nature of various medicinal materials and storage conditions. However, from the perspective of safe and effective medication, it should not be too long. Herbs (including leaves and flowers) generally do not exceed two years; woody plants (including roots, stems, and skins) do not exceed 3 years; fruits and seeds do not exceed 4 years; minerals do not exceed 10 years.
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