Research Blog
The evidence behind the botanicals
We read the primary literature rather than the sales page. Where the evidence is thin, we say so.
Evidence Review
Tongkat Ali: What the Human Trials Actually Show
The cortisol and mood data is better than most of this category — and still smaller than the marketing suggests.
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Evidence Review
Saw Palmetto and the Prostate: A Mixed Record
The largest randomised trial found no benefit over placebo. Here is why it still appears in almost every blend.
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More ingredient reviews as we publish them.
Back to the reviewRead the full Horsewood breakdown
Every ingredient, every gap in the evidence, and the current pricing.
See the Review