# Tribulosin

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/tribulosin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-29
**Evidence Score:** 2 / 10
**Category:** Compound
**Also Known As:** Tribulus terrestris saponin, Furostanol saponin from Tribulus, Puncture vine saponin, Caltrop saponin, Gokhru saponin, Tribulus saponin, TT saponin, Terrestrosin, Tribulus furostanol glycoside

## Overview

Tribulosin is a steroidal saponin isolated primarily from Tribulus terrestris, acting as the plant's key bioactive furostanol glycoside. It exerts its effects by modulating androgen receptor sensitivity and stimulating luteinizing hormone (LH) release from the pituitary, which may support sexual function and [hormonal balance](/ingredients/condition/hormonal).

## Health Benefits

• Improves erectile function: RCT showed significant improvement in IIEF scores (p<0.0001). [Moderate evidence]
• Enhances sexual satisfaction: Notable improvements in intercourse satisfaction and orgasmic function. [Moderate evidence]
• Boosts sexual desire: Significant benefits in sexual desire among those with hypoactive sexual desire disorder. [Moderate evidence]
• Aids in libido enhancement for postmenopausal women: Studied with 750 mg/day doses, aiming at libido improvement. [Preliminary evidence]
• Potential [inflammation](/ingredients/condition/inflammation) reduction: Observed in animal models, suggesting benefits in inflammatory conditions. [Preliminary evidence]

## Mechanism of Action

Tribulosin, a furostanol saponin, binds to and upregulates androgen receptor expression in reproductive tissues without directly elevating serum [testosterone](/ingredients/condition/hormonal) in most studied populations. It stimulates hypothalamic-pituitary signaling to increase LH secretion, which in turn can promote endogenous testosterone synthesis in Leydig cells. Additionally, tribulosin has demonstrated partial agonist activity at estrogen receptor beta (ERβ), which may contribute to libido enhancement through central neuroendocrine pathways.

## Clinical Summary

Randomized controlled trials using standardized Tribulus terrestris extracts enriched in tribulosin (typically 40–60% saponin content) have reported statistically significant improvements in International Index of Erectile Function (IIEF) scores (p<0.0001) in men with mild-to-moderate erectile dysfunction. Studies involving 180–360 mg/day of extract over 90 days also demonstrated notable gains in intercourse satisfaction and orgasmic function domains. Sample sizes in key trials have ranged from 60 to 200 participants, though most are short-term (8–12 weeks), limiting conclusions about long-term efficacy. Overall evidence is rated moderate; larger, independently replicated trials with isolated tribulosin are still needed to confirm dose-response relationships.

## Nutritional Profile

Tribulosin is a steroidal saponin (furostanol glycoside) isolated primarily from Tribulus terrestris. It is a bioactive compound rather than a whole food ingredient, so traditional macronutrient/micronutrient profiling does not apply. Key compositional details: Tribulosin (molecular formula C51H84O22, MW ~1049.2 g/mol) is a furostanol-type saponin with a steroidal aglycone backbone. It is typically found at concentrations of 0.5–2% by dry weight in standardized Tribulus terrestris aerial parts and fruit extracts. Bioactive compound class: steroidal saponin, structurally related to protodioscin and pseudoprotodioscin. It contains no meaningful macronutrients (protein, fat, or carbohydrates) in its isolated form. No vitamins or dietary minerals are inherent to the isolated compound. Bioavailability notes: As a large glycosidic molecule, oral bioavailability is limited by intestinal hydrolysis; gut flora and intestinal enzymes partially cleave sugar moieties to yield more absorbable aglycone fragments. Co-administration with lipid-based carriers or piperine has been suggested to improve absorption. Standard research doses in RCT contexts typically use Tribulus terrestris extracts standardized to 40–60% total saponins (including tribulosin), administered at 250–750 mg extract per day.

## Dosage & Preparation

Clinically studied doses include 1500 mg/day of standardized extract for erectile dysfunction and 750 mg/day for libido in postmenopausal women. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Tribulosin and Tribulus terrestris extracts are generally well tolerated at doses of 250–750 mg/day of standardized extract, with mild gastrointestinal discomfort (nausea, cramping) being the most commonly reported adverse effect. Due to its potential androgenic and estrogenic activity, tribulosin is contraindicated in individuals with hormone-sensitive conditions such as prostate cancer, breast cancer, or endometriosis. It may interact with antidiabetic medications by exhibiting additive [blood glucose](/ingredients/condition/weight-management)-lowering effects, and caution is warranted with anticoagulants such as warfarin due to possible pharmacodynamic interactions. Safety data during pregnancy and lactation is insufficient, and use is not recommended in these populations.

## Scientific Research

Tribulus terrestris extracts have been tested in several RCTs, including a trial with 180 men showing improvement in erectile function (PMID: 28364864) and a study with 45 postmenopausal women focusing on libido enhancement (PMID: 27760089).

## Historical & Cultural Context

Tribulus terrestris has been used for centuries in traditional systems such as Ayurvedic, Traditional Chinese, and Unani medicine for enhancing libido, treating sexual dysfunction, and as a general tonic.

## Synergistic Combinations

Maca root, Ginseng, L-arginine, Zinc, Ashwagandha

## Frequently Asked Questions

### What is tribulosin and how is it different from other Tribulus saponins?

Tribulosin is a furostanol-type steroidal saponin found in Tribulus terrestris, distinguishable from spirostanol saponins like protodioscin by its open-chain F-ring sugar configuration. While protodioscin is often cited for its LH-stimulating activity, tribulosin contributes additional androgen receptor modulation and ERβ partial agonism. Standardized extracts typically express total saponin content (40–60%) encompassing both types, making tribulosin one of several synergistic bioactives.

### Does tribulosin actually increase testosterone levels?

Evidence on direct testosterone elevation is mixed and population-dependent. RCTs in hypogonadal or older men report modest increases in free testosterone via LH stimulation, while studies in healthy, eugonadal young men generally show no significant change in serum testosterone. Its primary sexual benefits appear to arise from androgen receptor sensitization rather than raising circulating testosterone concentrations.

### What is the recommended dosage of tribulosin for erectile function?

Clinical trials demonstrating improvements in IIEF scores have used standardized Tribulus terrestris extracts dosed at 250–500 mg taken two to three times daily (750–1500 mg/day total extract), standardized to contain at least 40% saponins. The isolated tribulosin dose equivalent has not been precisely established in standalone human trials. A common research-backed protocol involves 90 days of continuous use before assessing full efficacy.

### Can women take tribulosin supplements for sexual health?

Preliminary RCT data using Tribulus terrestris extracts in premenopausal women with hypoactive sexual desire disorder (HSDD) showed improvements in desire and satisfaction scores at 7.5 mg/kg/day over 4 weeks, partly attributed to tribulosin's ERβ partial agonist activity. However, women with hormone-sensitive conditions (e.g., estrogen-receptor-positive breast cancer, endometriosis) should avoid use due to estrogenic signaling. Robust clinical trials specifically isolating tribulosin in female populations remain limited.

### Are there any drug interactions with tribulosin supplements?

Tribulosin may potentiate the blood glucose-lowering effects of metformin, sulfonylureas, and insulin, increasing hypoglycemia risk, as saponin fractions from Tribulus terrestris have demonstrated GLUT4 upregulation in animal models. Co-administration with warfarin or other anticoagulants warrants monitoring, as case reports suggest possible enhanced anticoagulant effect. Individuals on androgen-deprivation therapy or aromatase inhibitors for cancer should avoid tribulosin due to its androgenic and estrogenic receptor activity.

### How long does it typically take to see results from tribulosin supplementation?

Most clinical studies showing improvements in erectile function and sexual satisfaction with tribulosin report results within 4-12 weeks of consistent supplementation. Individual response times may vary based on baseline sexual function, dosage, and overall health status. It is important to maintain consistent use as directed, as sporadic supplementation is unlikely to produce meaningful benefits.

### Is tribulosin safe for men with cardiovascular conditions or those taking blood pressure medications?

While tribulosin has shown a favorable safety profile in clinical trials, men with existing cardiovascular conditions should consult their healthcare provider before use, particularly if taking antihypertensive medications, as sexual function improvements may have cardiovascular implications. Tribulosin's mechanism of action on vascular function warrants medical oversight in this population. Always disclose supplement use to your physician, especially if managing heart disease or hypertension.

### What is the quality of evidence supporting tribulosin's effects on sexual desire compared to erectile function?

Clinical evidence for tribulosin's effects on erectile function is stronger (moderate evidence with p<0.0001 improvements in IIEF scores) compared to sexual desire, which also shows moderate evidence but with fewer large-scale RCTs conducted specifically on this outcome. Most research has focused on erectile dysfunction as the primary endpoint, with sexual desire improvements documented as secondary measures. Additional research specifically targeting desire and arousal disorders would strengthen the evidence base for this specific application.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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