5% is a Cohen's d* of 0.3 — a small-to-moderate effect by itself, but surprisingly large for a mere vitamin/hormone rather than a targeted drug. * https://en.w

5% is a Cohen's d* of 0.3 — a small-to-moderate effect by itself, but surprisingly large for a mere vitamin/hormone rather than a targeted drug. * https://en.wikipedia.org/wiki/Effect_size#Cohen's_d https://en.wikipedia.org/wiki/Effect_size#Cohen's_d