About Tribulus Terrestris

Plant extract commonly used to enhance athletic performance, boost testosterone levels, and improve sexual function.

Effectiveness Scores

Men's Vitality Support: 6.0/10 (moderate evidence).
Tribulus terrestris may help improve erections and sexual satisfaction in men with mild to moderate erectile issues. It appears to work by boosting nitric oxide, which relaxes blood vessels and improves blood flow, and possibly through subtle hormone-related effects, though not by directly raising testosterone.

Why this rating: There's reasonable evidence that Tribulus can help, but not dramatically. Some studies are well conducted, others are of lower quality, and results vary by formulation. Overall, it appears promising for mild erectile dysfunction but less reliable for more severe cases.
Improve Libido: 6.0/10 (moderate evidence).
Tribulus may help boost sexual desire, arousal, lubrication, and satisfaction in women experiencing low libido or hypoactive sexual desire disorder (HSDD). It's thought to work by balancing hormones and improving blood flow to sexual organs.
Why this rating: The early research is encouraging but still limited. Results suggest real benefits for some women, particularly those before or during menopause, but there isn't enough data yet to confirm consistent effectiveness or ideal dosing.
Blood Sugar Support: 5.0/10 (moderate evidence).
Tribulus may help lower fasting and post-meal blood glucose and HbA1c levels, potentially through enzyme inhibition (α-glucosidase, α-amylase), antioxidant effects, and improved insulin sensitivity.

Why this rating: Results are encouraging but preliminary. Evidence from one main human RCT and several animal studies suggests possible benefits, but lack of replication, gender bias in study populations, and unclear mechanisms limit confidence. Larger, more diverse human trials are needed to confirm efficacy and optimal dosing.
Lower Cholesterol: 5.0/10 (moderate evidence).
May help lower total and LDL (“bad”) cholesterol, though effects on HDL and triglycerides appear minimal. The benefit may come from saponins that influence fat metabolism and help protect blood vessels from plaque buildup.
Why this rating: Evidence is limited to a single human trial in a narrow population, so results can’t yet be generalized. More research is needed in men and non-diabetic groups, as well as longer studies comparing Tribulus to standard cholesterol-lowering treatments.
Enhance Physical Performance: 2.0/10 (moderate evidence).
Despite being marketed as a natural performance enhancer, Tribulus doesn't meaningfully improve strength, muscle growth, or athletic performance in healthy people.
Why this rating: Research consistently finds no measurable benefit for strength or athletic performance. Occasional positive findings only appear when Tribulus is combined with other ingredients, making results unreliable. Overall, it doesn't live up to its reputation as a muscle-boosting supplement.
Increase Testosterone: 2.0/10 (moderate evidence).
Despite its reputation as a natural testosterone booster, Tribulus doesn’t meaningfully raise testosterone levels in men with normal hormone levels. While some animal research shows hormone increases, this effect hasn’t been replicated in humans.
Why this rating: The evidence overwhelmingly shows Tribulus does not boost testosterone in healthy men. At best, it may have a very small effect in men with low baseline levels, but not enough to matter clinically. Marketing claims about testosterone support are not supported by solid science.

Dosage & Timeline

Standard Dosages

General Dosage: 750-1500 mg
Erectile dysfunction: 1,500 mg

Timeline to See Results

All outcomes may be noticed after extended use or lack sufficient studies to establish an effectiveness timeline.

Safety Information

Pregnancy and breastfeeding: Tribulus should be avoided during pregnancy and breastfeeding, as its effects on hormone levels are not well studied in these contexts.
Hormone-sensitive conditions: Tribulus may increase testosterone levels, so individuals with hormone-sensitive conditions (e.g., prostate cancer, breast cancer) should avoid using it or consult a healthcare provider before use.
Heart and kidney issues: People with cardiovascular or kidney conditions should use Tribulus with caution, as its potential effects on blood pressure and heart rate have not been fully studied in individuals with pre-existing conditions.
Drug interactions: Tribulus may interact with medications that affect hormone levels, such as hormone replacement therapies, contraceptives, or medications for thyroid issues. It may also interact with blood pressure medications, so it is important to consult a healthcare provider before use.

Side Effects

Common side effects:

Mild stomach upset or digestive discomfort
Diarrhea or bloating in some individuals
Irritability or mood changes (due to potential hormonal effects)

Rare side effects:

Allergic reactions, such as skin rashes or swelling
Potential increase in heart rate or blood pressure, especially at higher doses

Side effects are generally mild and tend to subside when the supplement is discontinued. However, due to its effects on hormones, Tribulus should be used with caution, particularly in individuals with hormone-sensitive conditions.

Usage Information

Tribulus is supposed to increase testosterone, enhance libido, improve muscle strength, support athletic performance, and regulate blood sugar levels.

User Experience

User experiences with Tribulus terrestris are highly inconsistent and often contradictory. The most commonly reported benefit is increased libido and sexual desire in both men and women, with some users also noting improved energy and general vitality. However, athletic and bodybuilding users frequently report no measurable impact on muscle growth or strength, and when benefits occur, they’re often described as short-lived.

Overall, sexual effects appear far more reliable than any testosterone or performance-related outcomes. Many users combine Tribulus with other supplements, making it difficult to isolate its effects, and seasoned supplement users often express skepticism toward its muscle-boosting claims. Side effects like insomnia and acne occasionally lead to discontinuation, and while product quality and sourcing are emphasized as important, higher prices don’t necessarily equate to better results.

Alternative Names

Common Dubbletjie

Tribulus Terrestris