Link. Paywalled, but one review claims a dose-response curve with cortical thickness. MRI and cognitive testing. Correlation, not causation (non-random use). Mechanism unclear. Dosages much higher than androgen replacement of course.
Link. Paywalled, but one review claims a dose-response curve with cortical thickness. MRI and cognitive testing. Correlation, not causation (non-random use). Mechanism unclear. Dosages much higher than androgen replacement of course.