Protoflow Tribulus: 120 mg and the Testosterone Question

Tribulus terrestris, a low spiny plant also called puncture vine, whose fruit and root are used in traditional Indian and Chinese medicine.

The supplement trade promotes it for libido, athletic performance and testosterone. Extracts are often standardized to saponins, which are the compounds linked to its supposed effects. The label lists 120 mg and does not name the part used or the saponin level.

Most studies in healthy men found no rise in testosterone, and results on sexual function were mixed.

Reviews conclude that evidence does not support tribulus for raising testosterone in men (MSK, Tribulus terrestris). Some small trials in men with erectile dysfunction or low desire reported improved scores, but they were short and varied in quality. A fair summary is not proven.

Trials often used 250 to 1,500 mg of extract daily, so 120 mg of an unspecified form is on the low side.

That is fine for caution but limits any claim. Because the blend holds many herbs at modest doses, no single line is likely to match a trial dose. The product relies on the idea that many small amounts add up, which has never been tested.

Yes: low energy, low desire and erection changes can come from low testosterone, thyroid trouble, depression or sleep apnoea.

A blood test can check testosterone, and the result may point to a treatable cause. Over-the-counter tonics can delay that check. If you are tempted by testosterone claims, a doctor's visit is the better first step, and the NIH ODS has fair guides on supplement safety (NIH ODS, Supplements: What You Need to Know).

A popular herb whose headline claim has not held up in men.

Do not buy Protoflow expecting a testosterone effect, and ask a doctor if you suspect a hormone problem. A blood test is quick, it costs little compared with a six-bottle pack, and it can answer the question that the herb only promises to address.