> UVB is needed to make Vit D from sunlight
Actually, it's UVA. To make appreciable vitamin D you have to be out in the midday sun when there's plenty of UVA, not after ~2:30pm.
Actually, it's UVA. To make appreciable vitamin D you have to be out in the midday sun when there's plenty of UVA, not after ~2:30pm.