Serving Size: Usually taken as a capsule or tablet of standardized extract (no standard food serving)
No glycemic index number is listed for this food yet.
Men’s health: a benefit for erections is possible but not guaranteed. In 180 men with mild or moderate erectile dysfunction, a maker-funded trial found a 2.70-point gain over placebo on a 30-point score (Kamenov et al., Maturitas, 2017).
A smaller trial of 30 men found no difference from placebo (Santos et al., Actas Urológicas Españolas, 2014).
Testosterone did not change in eight of ten trials (Vilar Neto et al., Nutrients, 2025).
The European Medicines Agency concluded in 2024 that the evidence for use in men with erectile dysfunction is insufficient.
Tribulus is a supplement, not a food. A case report describes severe liver and kidney injury in a man taking it (Mohy-Ud-Din and Jonassaint, ACG Case Reports Journal, 2024); single cases cannot show cause.
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GI measures how fast a food raises blood sugar.
Tells you how big that rise actually is once portion size is factored in.
Watermelon has a high GI (it digests quickly) but a low GL because a normal serving doesn’t
contain many carbs so the actual blood-sugar impact is small.
Understanding both GI and GL gives you a clearer picture of how foods affect your blood sugar both the speed of the rise and the true impact based on the portion you eat.
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