Constituents
Acids
Sub of essential oil. Combine with alcohol to form esters. The best-known example is perhaps salicylic acid. Effect: antihypertensive (hypotensive), anti-fever, anti-inflammatory.
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Aldehydes
Sub of essential oil. Works on the limbic system, which it soothes.
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Alkaloids, general
The alkaloids are a group of constituents that you best keep away from if you don't know exactly what you are doing. Among alkaloid-containing plants are illustrious names such as…

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Amara acria
Sub of bitters. Plants with astringent substances in addition to bitters.
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Amara adstringia
Sub of bitters. In addition to bitters, these plants also contain tannins and therefore have an astringent effect.
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Amara aromatica
Sub of bitters. Plants with aromatic bitters. The essential oils enhance the effect of the bitters by locally stimulating the gastric mucosa.
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Amara mucilaginosa
Sub of bitters. In addition to bitter substances, these plants also contain mucilage. As a result, they have a protective and soothing effect on the gastric mucosa and the respiratory tract.
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Amara pura
Sub of bitters. Plants with pure bitters.
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Anthocyanins, anthocyanidins, anthocyanosides
Sub of flavonoids. Are made from polymeric procyanides. Examples: cyanidin, delphinidin, malvidin, petinidin.
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Anthraquinones, general
Anthraquinones color the plants in which they occur. They can therefore also be used as dyes. They occur bound to glucose or another sugar and that is their active form.…

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Aromatic aldehydes
Sub of essential oil. Similar effects and side effect as the phenols.
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Azulens, diterpenes, sesquiterpenes
Sub of essential oil. Effect: anti-inflammatory, antihypertensive, sedative.
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Balsams
A balsam is an oil resin, a combination of an essential oil and a resin. They are popular in the cosmetics industry because of their nice scent, but they also…
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Balsams, gums and resins, general
Balsams, gums and resins are exudates that flow from a plant when damaged.

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Biflavenoids
Sub of flavonoids. Examples: amentoflavone, bilobetine, ginkgetin, isiminetin.
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Bitters, general
Bitters are plant constituents which have a bitter taste as a common characteristic.

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Bitters, other
Sub of bitters. Plants with bitters, but which develop their main effect in other areas through other ingredients, such as antihypertensive, calming, antipyretic, disinfectant, anti-inflammatory, wound healing and antiseptic.
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Caffeine
Caffeine is a purine.
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