Evidence briefs
One supplement.
One outcome.
One honest answer.
A focused brief for every supplement-outcome pair we have data on. Each one pulls the trial evidence for that specific pair and tells you what it actually shows — effect size, study count, what's still uncertain, and what to watch out for.
13 briefs · 7 supplements
Ashwagandha
5 briefs- Read →
Ashwagandha for Anxiety: What 14 Trials Actually Show
Ashwagandha appears to reduce anxiety symptoms more than placebo, and when 14 studies with 1,311 people are looked at together, the average benefit lands in the moderate range—noticeable for some people, subtle for others.
Studied, unclear 14 studies 1,311 participants May 4, 2026
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Ashwagandha for Male Fertility Hormones: 12 Trials
Across 12 studies in 202 infertile men, ashwagandha appears to improve reproductive hormone balance, with an overall moderate effect that some men would notice and others would feel as a subtler shift.
Likely benefit 12 studies 202 participants May 11, 2026
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Ashwagandha for Testosterone: What 17 Studies Show
Ashwagandha appears to raise testosterone a little.
Faint early signal 17 studies 944 participants May 5, 2026
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Ashwagandha for Weight Loss: What 5 Trials Actually Show
Ashwagandha doesn't appear to meaningfully lower body weight.
Barely detectable 5 studies 196 participants May 11, 2026
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Ashwagandha for Women's Sexual Function: What 8 Studies Show
Ashwagandha suggests a noticeable improvement in women's sexual function over about 8 weeks.
Large effect, needs confirmation 8 studies 239 participants May 15, 2026
CoQ10
2 briefs- Read →
CoQ10 for Lower LDL: What 14 Studies Actually Show
CoQ10 appears to lower LDL a little.
Likely modest benefit 14 studies 9,367 participants May 11, 2026
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CoQ10 for Sperm Motility Fertility: 10-Trial Evidence
CoQ10 improves sperm movement, but only a little.
Likely real but unnoticeable 10 studies 7,573 participants May 11, 2026
Magnesium
2 briefs- Read →
Magnesium for Sleep Quality: What 7 Trials Really Show
Magnesium does not deliver a clear, reliable boost in sleep quality based on current trials.
Not enough research 7 studies 317 participants Apr 27, 2026
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Magnesium for Weight Loss: What 6 Studies Actually Show
Magnesium does not appear to help you lose body weight.
Doesn't appear to help 6 studies 1,903 participants May 11, 2026
