Thank you! I didn’t look much at studies looking at the impact of vitamin D on mood, but at a glance, the RCTs seem incredibly inconclusive. This meta analysis found a good looking effect-size, but the funnel plot suggests a horrific amount of publication bias. There’s an ongoing study that looks well-designed but it’s happening in Finland (which already fortifies their food to the sky) and they don’t screen for low baseline levels and the sample is small, so it seems unlikely to be definitive...
Thank you! I didn’t look much at studies looking at the impact of vitamin D on mood, but at a glance, the RCTs seem incredibly inconclusive. This meta analysis found a good looking effect-size, but the funnel plot suggests a horrific amount of publication bias. There’s an ongoing study that looks well-designed but it’s happening in Finland (which already fortifies their food to the sky) and they don’t screen for low baseline levels and the sample is small, so it seems unlikely to be definitive...