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A yellow crystalline principle composed of aloe-emodin and glucose, obtained from aloe; used as a laxative.
Synonym(s): aloetin, barbaloin


A bitter yellow crystalline compound obtained from certain aloes and having laxative properties. Its use in laxatives was banned in the United States in 2002.

aloin (alˑ·ō·in),

n an extract of aloe that consists of several active chemical components, primarily barbaloin, and has cathartic properties. See also barbaloin.


the active constituent in aloes; used at one time as a purgative for horses.
References in periodicals archive ?
Study design/methods: The inhibitory effect of aloin on in vitro osteoclastogenesis was evaluated by reduction in tartrate-resistant acid phosphatase (TRAP) content and expression levels of osteoclast-specific gene, cathepsin K.
Thus, even as the hunt for official methods for aloin will be winding down in March, the search for official methods for polysaccharides will be ramping up.
Effect of indomethacin on aloin and 1,8 dioxianthraquinone-induced production of prostaglandins in rat isolated colon.
Aloe vera is nontoxic, with no known side effects, provided the aloin has been removed by processing.
Allergic reactions are mostly due to anthraquinones, such as aloin and barbaloin.
The prime suspect for causing the tumours is aloin A, which together with other aloe extracts was removed from laxitives sold over the counter in US pharmacies in 2002 because manufacturers had not provided the US Food and Drug Administration (FDA) with sufficient safety information.
However, a lack of federal labeling requirements means consumers cannot be sure whether or how much aloin is present in any given product.
Aloin production in calli and leaves of in vitro regenerated shoots of aloe (Aloe vera L.
Aloin, used as a bittering agent in beverages and as a pharmaceutical laxative, is extracted.
Growth, soluble carbohydrates, and aloin concentration of Aloe vera plants exposed to three irradiance levels.
Plant Type of phytochemical(s) Alangium salviifolium Isoquinoline alkaloids and derivatives (IAD) Aloe vera Aloin Azadirachta indica Limonoids Apium graveolens Polyacetylenes Alisma orientale Triterpenes Alstonia yunnanensis IAD Aristolochia cucurbitifolia IAD Aristolochia manshuriensis IAD Atractylodes macrocephala Sesquiterpenes Berberis vulgaris Berberine Brucea javanica Triterpenes Clausena harmandiana IAD Daphniphyllum glaucescens Terpenoids, alkaloids Dictamnus dasycarpus Triterpenes Emblica officinalis Alkaloids Euphorbia fischeriana Diterpenes Ginkgo biloba Terpenoids Goniothalamus amuyon IAD Gynura pseudochina (L.