Tribulus terrestris is a widely marketed 'testosterone booster' whose active compounds — steroidal saponins (protodioscin, protogracillin) — are claimed to increase LH and free testosterone. However, clinical evidence does NOT support testosterone elevation in healthy young men — multiple RCTs show no significant testosterone increase [1]. Some evidence exists for improved sexual function (desire/erection) independent of testosterone changes, possibly through a nitric oxide mechanism [2].
Category: Herbal extract
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