Estratti fluidi

Fluid plant extracts

The fluid plant extracts are one of the most widespread methods of exploitation, in the phytotherapeutic field, of the resources contained in plants and vegetables for the care and well-being of the body. In fact, the fluid extract allows to keep almost unchanged all the properties and the phytocomplex spectrum of the dry drug from which the processing begins. For this reason it is said that the ratio between dry extract and powdered drug must be 1: 1, that is, one part by weight of the dry extract corresponds to one part by weight of the dried drug. The fluid plant extracts are products particularly rich in beneficial properties also because they are made by letting the dried plant macerate in a solvent, generally alcoholic, which favors the conservation of all useful substances. The fluid extract is therefore a fundamental resource in phytotherapy and only in rare cases does the loss of important plant substances occur. From the fluid extract you can also start to obtain the dry extract, which is also widely used in phytotherapy.


The characteristics of the fluid extracts can vary considerably depending on the starting plant: their use is strictly regulated by the Ministry of Health, as well as the procedures that lead to the processing and production of the extracts, which are distributed in the form of supplements. Fundamental, for the preparation of the fluid extracts, is the selection of the plant from which to extract the drug for the realization of the final product: in it there will be pharmacologically inert or harmful substances, alongside those sought. Precisely the strict selection of the latter allows the marketing of products with targeted efficacy and standardized effects: being able to be sure of the results offered by the product is in fact a fundamental characteristic in medicine. The quantity and quality of active ingredients stored in the final product is an otherwise variable factor and not dependent only on the quality of the raw materials used, but also on the processes related to each stage of processing, starting from harvesting and storage to treatment. the final. Even the choice of the solvent must be targeted for the type of plant you are working with, in order to select the active ingredients of interest and eliminate those that are harmful, not very active or completely inert from a medical point of view.


As we have seen, the preparation of fluid extracts must take place according to precise and regulated methods, which undergo variations according to the type of plant and drug with which one is dealing and with its specific characteristics. The preparation usually takes place by exploiting the process of maceration of the dried plant for a fixed time inside a liquid that can guarantee the maintenance of the phytocomplex in its best integrity: alcohol or glycerin can be used, after having possibly purged the plant of non useful with a preliminary processing. Depending on the liquid used for the preparation, the fluid extracts are divided into ethereal, alcoholic, hydroalcoholic and aqueous. For the realization of the final product we will then operate in order to maintain the proportion of one to one between the parts of fluid extract and dried drug. Maceration, however, is not the only process to obtain the fluid extract: sometimes it is used the percolation or dissolution of a dry or soft extract in alcohol of an appropriate title. These operations can lead to the formation of a residual deposit, which will not be used for the production of the finished product.

Fluid Extracts: Advantages and Disadvantages

As seen, one of the main advantages of fluid extracts is to best preserve all the beneficial properties of the plant and to be able to carefully select and divide them from the inert ones, for an extremely effective and successfully usable product in the medical field, with variable specific application. depending on the type of plant and therefore on the active ingredient being processed. The low presence of alcohol in the finished product allows the fluid extracts to be exploited with maximum effectiveness as bases for the preparation of syrups and other fluid medicines for internal use. To the advantage of this preparation it is also necessary to add the possibility of keeping it for a long time and being able to obtain considerable quantities of active ingredient in a few ml of product. Compared to mother tinctures, however, the integral conservation of the phytocomplex is slightly lower due to the low alcohol content: the advantage, therefore, is such only in relation to the type of use that needs to be made of the product. The fluid extracts allow the selection of the active ingredients of the plant, but not the maintenance of all its characteristics, such as taste and aroma, which remain unchanged in the case of mother tinctures.

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