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About Tribulus - Tribulus terrestris and related species

Botannical facts

Tribulus is a genus of herbs, botanically classified as Division: Magnoliophyta, Class: Magnoliopsida, Order: Zygophyllales, Family: Zygophyllaceae. Tribulus terrestris is the best known species. Other species are T. cistoides, T. longipetalus, T. micrococcus, and T. zeyheri Tribulus species are generally considered weeds, but some are used as decorative plants.

In warm region tribulus is perennial, but in colder regions it grous as an annual plant.

The flowers ar hermaphroditic with five petals and they are pollinated by insects. The plant grows as a wine. The leaves are compund with oppositely set component leaves.


Habitat and growth condition

The genus is found in many warm regions, but also grows in colder zones like the south of Europe. It is most aundant in Pakistan, India and Sri Lanka.

Production, preparation and use: Mostly the fruit is used. The fruit is available as dried powder. Also ectracts of blends of the active components are made for use in herbal medicine. The recomanded dose when used alone as a powder is 0.75 to 1.25 grams per day. The powder should be blended in meals to avoid stomach upset.

Effective constituents and their basic effects: Tribulus contains alkaloids, flavonids, steroidal saponins (furostanol glycosides and spirostanol glycosides) and protodioscin. It is not clear what substances that make the medical effects, and exactly how these effects occur.

A basic effect maybe stimulation of the production of luteinizing hormone, DHEA and estrogen. These hormones stimulate many activities in the genitals and the body elswhere. For example will the increased production of LH in turn stimulate a greater production of the male sex hormone testosterone. The increased amount of LH and testosterone will give the resulting medical effects.


Medical effects

Tribulus stimulates libido and sexual functions, especially the erctile power.

It may also improve the amount of semen produced in a man and male fertility.

Tribulus may stimulate the power of muscles and the endurance during muscle work, or at least it may gives a feeling of greater power.

The greatest effect during training is perhaps an increase in the lust to push on during muscular training work, a greater agility and a greater ability to enage the internal energy and muscular strength a man possesses during the training.

Therefore it is often used by athletes as a training supplement.

A basic effect that creates these other effects is that the herb helps the man to produce more testosterone, but never so much that it is dangeous for the health.


Side effects

If taken alone without being blended, or taken in higher doses than 1.25 grams of dried powder, it can upset the stomach.


Traditional medical uses

Tribulus has been used in China and India for centuries as a sexual enhancer and as a tonic drug.

It has also traditionally been used to enhance urine production, for urinary ailments and against goat.


Uses in modern herbal drugs

The herb is used in drugs for men to increase libido, fertility and other and sexual functions, and in drugs for athletes to stimulate strength and endurance.

Some athletes takes testosterone (often illegally) as a training sipplement. This will however lower the bodie's own testosterone production. Then tribulus is used to normalize the testosterone production of the body again.

Uses in pharmacological products: Athletes in eastern Europe used tribulus extracts in the seventies and eighties to enhance sport performance.

A tribulus species (Tribulus cstoides). a species used commonly as a garden and decorative plant. (image from www.wikipedia.org)