Does fenugreek boost testosterone?

Possibly a little. Fenugreek has modest, mixed evidence for libido and free testosterone, but it is no magic booster, and the loudest claims tend to come from the brands selling it.

Fenugreek is a kitchen-spice herb whose seed extracts have been through small human trials, usually using standardised extracts rich in compounds called saponins, sold under names such as Testofen or Furosap. The results disagree with each other. Several short studies report better libido, mood and well-being, and a few show small rises in free testosterone, while others find no meaningful change in total testosterone at all. If there is a consistent thread, it runs through sexual desire and vitality rather than the number on a blood test.

It pays to read the small print on those trials, because many are short, small, and funded by the company selling the extract, which tends to flatter the results. One proposed mechanism is that fenugreek mildly slows the enzymes that break testosterone down into oestrogen and DHT, but this is far from settled. Treat the headline claims of "double-digit testosterone increases" with healthy scepticism.

Any real effect is modest, and it shows up most in men who are stressed, training hard, or starting from a poor baseline, not in men who already sleep well, train and eat enough protein. That pattern holds across the booster aisle, from ashwagandha to testosterone supplements in general: a little help at the margins, never a stand-in for the basics.

• Dose: a standardised seed extract of around 300 to 600 mg a day
• Give it 8 to 12 weeks before judging it
• Treat it as a minor add-on, not the main event
• Generally well tolerated, though it can cause mild stomach upset and a maple-syrup body odour
• May interact with blood thinners and diabetes medication, so check with your doctor

The honest verdict: if your basics are already handled and you are curious, fenugreek is a low-stakes experiment. If your sleep, training and diet are not yet dialled in, fix those first. They will do far more for your testosterone than any seed extract.