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Tribulus 650 mg

Gaspari Nutrition
4.4
★ ★ ★ ★ ★
(29 ratings)
Tribulus 1950 mg
Product Image
Score68
The Bulgarian source and large declared amount give the formula clear botanical focus. No saponin standardization is given, and the unusually large amount is poorly aligned without extract-ratio context.
How scoring works
Quantity:90 Capsule(s) • (30 servings)
Goals:
Testosterone Support

Score 68

The Bulgarian source and large declared amount give the formula clear botanical focus. No saponin standardization is given, and the unusually large amount is poorly aligned without extract-ratio context.
How scoring works
$17.49($0.58 per serving)
iHerb
$ 17.49
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Analysis

Bulgarian tribulus extract supplies 1,950 mg of tribulus in a focused single-ingredient formula. The narrow design makes the product easy to assess and combine with an otherwise established routine.

No saponin standardization is given, and the unusually large amount is poorly aligned without extract-ratio context. Tribulus is more plausibly viewed as a traditional vitality or libido ingredient than as a dependable way to raise testosterone in healthy adults.

The three-capsule serving and moderate value do not offset the potency uncertainty. It fits users who specifically want tribulus and understand that a clearly labeled dose does not establish hormone effectiveness.

Who is it for
  • Adults specifically seeking a tribulus supplement
  • Users who prefer a focused single-ingredient formula
  • People with realistic expectations about testosterone support
Best for
  • Targeted tribulus intake
  • Simple daily botanical routines
  • Users exploring libido-oriented support

Pros

  • 1,950 mg tribulus amount is clearly stated
  • Single-ingredient formula is easy to evaluate
  • The Bulgarian source and large declared amount give the formula clear botanical focus

Cons

  • No saponin standardization is given, and the unusually large amount is poorly aligned without extract-ratio context
  • Does not cover foundational nutrient or stress pathways
  • Limited evidence for raising testosterone in healthy adults

Warnings

  • Tribulus has limited evidence for raising testosterone in healthy adults and should not replace evaluation of persistent hormone-related symptoms.
  • Tribulus may affect blood pressure or glucose control, so users of antihypertensive or glucose-lowering medicine should review it with a clinician.
  • Because the saponin concentration is unknown, avoid stacking it with other tribulus products where total active exposure cannot be estimated.

Nutrient quality

66 High impact

The large extract amount offers substantial botanical weight but uncertain active potency. Missing standardization and an unusually aggressive dose reduce balance.

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Ingredient transparency

81 Highest impact

The active amount and source region are clearly stated without a hidden blend. Complete directions, inactive ingredients, plant part, and saponin standard remain missing.

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Customer satisfaction

54 Moderate impact

The supplied average is good but not exceptional and based on a small sample. No review themes were provided, so consistency and purpose-specific experience cannot be assessed.

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Value for money

66 High impact

Large botanical weight provides some value at a moderate serving cost. Uncertain potency and unnecessary dose intensity weaken competitiveness.

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Goals

Testosterone Support
Impact
Moderate effect
D Goal FitC- Strength of SupportF CoverageB+ Formula Quality

Tribulus is commonly marketed for testosterone, but human trials generally do not show reliable increases in healthy men. The product may be more relevant to libido than to measurable hormone support.

The extract amount is disclosed, while saponin percentage and plant part are missing. A single weakly supported botanical does not cover nutrient, stress, or endocrine contributors.

Study evidence
Tribulus Disputed 13 studies

Ingredients

IngredientAmount per serving
Bulgarian Tribulus terrestris extract
1950 mg
Adults 18–50
Report overview
Tribulus · 1950 mg OverallScore56
C- Active Ingredient Quality & BioavailabilityD+ Dose, Safety & Label TransparencyC Value

The Bulgarian source supports botanical quality, but no saponin percentage is disclosed. The stated amount greatly exceeds the preferred serving range, which makes the dose less well aligned. Its moderate serving cost does not offset the uncertainty around standardization and the unusually large amount.

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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Effects of Tribulus (Tribulus terrestris L.) Supplementation on Erectile Dysfunction and Testosterone Levels in Men-A Systematic Review of Clinical Trials.
    Vilar Neto JO; de Moraes WMAM; Pinto DV; da Silva CA; Caminha JSR; Nunes Filho JCC; Reis CEG; Prestes J; Santos HO; De Francesco Daher E · Nutrients · 2025
    Systematic review483 participants10 studies pooledTestosterone Support forTribulus
  2. Tribulus terrestris versus placebo in the treatment of erectile dysfunction: A prospective, randomized, double blind study.
    Santos CA; Reis LO; Destro-Saade R; Luiza-Reis A; Fregonesi A · Actas urologicas espanolas · 2015
    Randomized trial30 participantsTestosterone Support forTribulus
  3. The aphrodisiac herb Tribulus terrestris does not influence the androgen production in young men.
    Neychev VK; Mitev VI · Journal of ethnopharmacology · 2005
    Randomized trial21 participantsTestosterone Support forTribulus
  4. Efficacy of Tribulus Terrestris for the treatment of premenopausal women with hypoactive sexual desire disorder: a randomized double-blinded, placebo-controlled trial.
    Vale FBC; Zanolla Dias de Souza K; Rezende CR; Geber S · Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology · 2018
    Randomized trial40 participantsTestosterone Support forTribulus
  5. Do "testosterone boosters" really increase serum total testosterone? A systematic review.
    Morgado A; Tsampoukas G; Sokolakis I; Schoentgen N; Urkmez A; Sarikaya S · International journal of impotence research · 2024
    Systematic review3 studies pooledTestosterone Support forTribulus
  6. The Effects of 6 Weeks of Tribulus terrestris L. Supplementation on Body Composition, Hormonal Response, Perceived Exertion, and CrossFit® Performance: A Randomized, Single-Blind, Placebo-Controlled Study.
    Fernández-Lázaro D; Mielgo-Ayuso J; Del Valle Soto M; Adams DP; González-Bernal JJ; Seco-Calvo J · Nutrients · 2021
    Randomized trial30 participantsTestosterone Support forTribulus
  7. The effect of five weeks of Tribulus terrestris supplementation on muscle strength and body composition during preseason training in elite rugby league players.
    Rogerson S; Riches CJ; Jennings C; Weatherby RP; Meir RA; Marshall-Gradisnik SM · Journal of strength and conditioning research · 2007
    Randomized trial22 participantsTestosterone Support forTribulus
  8. Beyond tribulus (Tribulus terrestris L.): The effects of phytotherapics on testosterone, sperm and prostate parameters.
    Santos HO; Howell S; Teixeira FJ · Journal of ethnopharmacology · 2019
    Narrative reviewTestosterone Support forTribulus
  9. Prospective Analysis on the Effect of Botanical Medicine (Tribulus terrestris) on Serum Testosterone Level and Semen Parameters in Males with Unexplained Infertility.
    Roaiah MF; Elkhayat YI; Abd El Salam MA; Din SFG · Journal of dietary supplements · 2019
    Single-arm trial30 participantsTestosterone Support forTribulus
  10. Pilot Study on the Effect of Botanical Medicine (Tribulus terrestris) on Serum Testosterone Level and Erectile Function in Aging Males With Partial Androgen Deficiency (PADAM).
    Roaiah MF; El Khayat YI; GamalEl Din SF; Abd El Salam MA · Journal of sex & marital therapy · 2017
    Single-arm trial30 participantsTestosterone Support forTribulus
  11. Tribulus terrestris versus placebo in the treatment of erectile dysfunction and lower urinary tract symptoms in patients with late-onset hypogonadism: A placebo-controlled study.
    GamalEl Din SF; Abdel Salam MA; Mohamed MS; Ahmed AR; Motawaa AT; Saadeldin OA; Elnabarway RR · Urologia · 2019
    Randomized trial70 participantsTestosterone Support forTribulus
  12. Efficacy of Tribulus terrestris for the treatment of hypoactive sexual desire disorder in postmenopausal women: a randomized, double-blinded, placebo-controlled trial.
    de Souza KZ; Vale FB; Geber S · Menopause (New York, N.Y.) · 2018
    Randomized trial45 participantsTestosterone Support forTribulus
  13. Effect of oral administration of Tribulus terrestris extract on semen quality and body fat index of infertile men.
    Salgado RM; Marques-Silva MH; Gonçalves E; Mathias AC; Aguiar JG; Wolff P · Andrologia · 2018
    Single-arm trial65 participantsTestosterone Support forTribulus