Fenugreek seed is a kitchen spice, and trials of its patented extracts disagree on testosterone: a 2026 pooled analysis rated the evidence very low certainty.
No glycemic index number is listed for this food yet.
Herb
Health Benefits:
Men’s health: a small rise in testosterone is possible but not guaranteed. In 120 men aged 43 to 70, a supplier-funded trial of a seed extract found a rise the authors called small (Rao et al., The Aging Male, 2016).
Those trials tested patented extracts in pills, not the spice. The European Medicines Agency describes the seed as rich in galactomannans, a soluble fiber.
Safety: the agency rules fenugreek out for anyone allergic to peanut, soy or other legumes, and does not recommend it in pregnancy or breastfeeding.
Tells you how big that rise actually is once portion size is factored in.
Example:
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.
Why it matters:
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.