Ecdysterone and turkesterone
Trials disagree. Many products contain almost none.
Grade B: Some human proof
Small, early or mixed results in people.
The grade is for the use people talk about, not for every use. Filed under: Testosterone boosters, over the counter.
How it works
Plant steroids found in spinach and quinoa, sold as natural anabolics.
How it was given in studies
By mouth. In the trials people swallowed it as a capsule, tablet, powder or drink.
This is what the studies did. It is not a how-to.
What studies saw
A 10-week trial in 46 young men found more muscle and strength. An 8-week trial in 45 trained men found nothing. The only turkesterone study, in 11 men, found no effect on what it measured.
The trade-off
A 2025 trial found no benefit, and its capsules held less than 1% of the claimed ingredient.
When it showed up, in studies
One 10-week trial found gains. An 8-week and a 12-week trial did not.
Sources
Put this grade on your site
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Keep going
We show what studies found. We never tell you what to take. Doses vary by study. Check the sources and talk to a doctor.