Tribulus Terrestris: Benefits, Dosage, Contraindications

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Herbaceous plant widely spread in the Mediterranean region, the Middle East, and South Africa, Tribulus is used in traditional Ayurvedic, Arab, and Chinese medicine. Its flowers are narrow and yellow, with a diameter of about 1 cm. It can bloom throughout the year. Therapeutically, it is the fruit that is used. The constituents extracted from Tribulus include phenolic compounds, saponins, sterols, and alkaloids. Overall, the content of steroidal saponins is considered the most important and includes constituents such as protodioscin, dioscin, yamogenin, epismilagenin, tigogenin, neotigogenin, gitogenin, and neogitogenin. Beta-sitosterol, vitamin C, potassium, and calcium are also present. Two major alkaloids have been identified: harman and norharman. Among the steroidal saponins, protodioscin is considered the main constituent responsible for the plant’s effects on libido and sexual function. Traditionally, this plant is used as an aphrodisiac and to prevent urinary lithiasis. Its saponin content could benefit menopausal women. Indeed, plants containing steroidal saponins like Tribulus have been used to alleviate symptoms related to decreased estrogen levels.

Other name(s) 

Puncture Vine, Maltese Cross

Scientific name(s)

Tribulus Terrestris

Family or group: 

Plants

Active ingredients:

Saponins


Indications

Rating methodology

EFSA approval.

Several clinical trials (> 2) randomized controlled with double blind, including a significant number of patients (>100) with consistently positive outcomes for the indication.
Several clinical trials (> 2) randomized controlled with double blind, and including a significant number of patients (>100) with positive outcomes for the indication.
One or more randomized studies or multiple cohorts or epidemiological studies with positive outcomes for the indication.
Clinical studies exist but are uncontrolled, with conclusions that may be positive or contradictory.
Lack of clinical studies to date that can demonstrate the indication.


Sexual Disorders
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Sexual disorders (libido and erection) with or without hypogonadism in men. Sexual disorders in women.

Posologie

posologieOral: fruit

posologie400 - 750 mg

formulationdry extract


Synergies


Erectile Dysfunction
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A blend of nine herbs, including Tribulus, was evaluated using in vitro and in vivo animal studies and demonstrated improvement in sexual activity and erectile function. Clinical studies with patients suffering from erectile disorders show that taking 500 mg of Tribulus three times a day for three months does not provide clinically beneficial improvement in erectile function compared to placebo. Other clinical research shows that taking 400 mg of Tribulus twice daily for 30 days does not improve erectile function compared to placebo. However, a preliminary clinical study conducted with patients suffering from partial androgen deficiency shows that taking 250 mg of Tribulus three times daily for 3 months improves erectile function compared to baseline values. Tribulus has also been studied in combination with other ingredients. Preliminary clinical research shows that taking a combined supplement containing 450 mg of Tribulus, 300 mg of brown algae, and 250 mg of chitosan two times a day for 3 months improves sexual satisfaction, desire, ejaculatory function, and sexual quality of life compared to placebo in patients with mild to moderate erectile dysfunction.

Posologie

posologieOral: fruit

posologie750 mg

duration3 - months

formulationdry extract


Menopause
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Research suggests that a product combining Tribulus, ginger, saffron, and cinnamon can alleviate mental and physical symptoms related to menopause, without any notable effect on genitourinary symptoms. Additionally, Tribulus saponins could increase follicle-stimulating hormone (FSH) in women, leading to higher estradiol levels, indicating potential action at the hypothalamus level. These compounds are also used to alleviate estrogen withdrawal symptoms in postmenopausal women.

Posologie

posologieOral: fruit

posologie750 mg

formulationdry extract


Synergies


Benign Prostatic Hyperplasia
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Tribulus, combined with other plants, has been tested for relieving symptoms of benign prostatic hyperplasia (BPH) in clinical studies. The results indicate a significant improvement in symptoms and quality of life among treated men, comparable to the effects of the drug tamsulosin. However, the specific impact of tribulus in these results requires further research to be fully understood.

Posologie

posologieOral administration: fruit

posologie1200 mg

formulationdry extract


Synergies


Polycystic Ovary Syndrome
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A clinical study shows that the daily intake of 245 mg of tribulus extract, combined with other ingredients and lifestyle modifications during the follicular phase of the menstrual cycle for 3 months, improves some symptoms of PCOS, including a 33% reduction in oligomenorrhea or amenorrhea and a 43-day reduction in cycle duration compared to lifestyle modification alone. The combination of herbs also improves quality of life by around and reduces body mass index by 1 kg/m2 compared to placebo. Although conception rate was quadrupled in patients taking the combined product, the live birth rate was similar to patients taking the placebo.

Posologie

posologieOral administration: fruit

posologie245 mg

duration3 - months

formulationdry extract


Synergies


Properties


Hormonal Metabolism

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Tribulus is studied for its potential effects on reproductive function and hormone levels in both men and women. Preliminary research suggests it may improve sexual dysfunction in both genders and erectile dysfunction in men. These beneficial effects could be related to changes in hormone levels. Indeed, animal studies have shown that protodioscin, a component of Tribulus, can increase testosterone levels, luteinizing hormone, DHEA, and dihydrotestosterone. Research in rats also indicated that steroidal saponins extracted from Tribulus stimulate sperm production and improve their viability. A clinical study noted that supplementation with Tribulus at a dose of 250 mg three times a day for three months can significantly increase serum testosterone levels in adults with partial androgen deficiency, without affecting luteinizing hormone. Other clinical studies found that Tribulus significantly increases levels of free and bioavailable testosterone in pre- and post-menopausal patients suffering from hypoactive sexual desire disorder.

Usages associés

Menopause, Sexual Disorders

Fertility Effect

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Tribulus stimulates libido and fertility, showing positive effects on sexual behavior and sperm production in animal studies. It enhances sexual function, particularly by boosting aphrodisiac activity and positively influencing levels of testosterone and other hormones important for reproduction. Chronic administration seems to be more effective than single doses. Proposed mechanisms include increased androgen levels and nitric oxide release, helping to improve sexual performance.

Usages associés

Erectile Dysfunction, Sexual Disorders

Diuretic

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A high oral dose of Tribulus, 5 g/kg, demonstrated diuretic activity superior to furosemide at 120 mg/kg in in vivo studies. However, the dose required to achieve this effect seems impractical from a clinical viewpoint.


Cardiovascular

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Tribulus exhibits cardioprotective actions, including dilating coronary arteries and improving coronary circulation, which may assist in treating angina. It also demonstrated antihypertensive effects in animal studies, potentially through angiotensin-converting enzyme inhibition or direct relaxation of arterial smooth muscle, involving nitric oxide release. Additionally, Tribulus can reduce serum lipids, mitigate endothelial cell damage, and partially repair endothelial dysfunction caused by hyperlipidemia. These effects suggest a beneficial potential of Tribulus for cardiovascular health.


Anticancer

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Tribulus shows anticancer effects in the laboratory, notably by destroying malignant melanoma cells and inducing cell death in liver and breast carcinoma cells. Its compounds, particularly steroidal saponins, act against several cancer types, including ovarian cancer. These results suggest potential use of Tribulus in cancer research.


Safety dosage

Adult up to 18 year(s): 750 mg - 1500 mg

Tribulus extract has most often been used at doses of 750-1200 mg per day for 12 weeks.


Interactions

Médicaments

Warfarin: weak interaction

A herbal combination including Tribulus terrestris has been associated with an increased risk of bleeding in people on warfarin.


Precautions

Breastfeeding woman: avoid

Insufficient data.


Contraindications

Pregnant woman: prohibited

Abortive effect.

Prostate cancer: prohibited

Individuals with androgen-sensitive tumors should avoid using tribulus.