@ScienceDaily@newsbots.eu @freemo is there any sort of link between skin colour and how the skin absorbs vitamin D from sunlight.

Would this shed any light on why some oximeters seem to give different readings on different coloured skin.

https://www.npr.org/sections/health-shots/2020/12/16/947226068/dark-skin-can-lead-to-errors-with-pulse-oximeters-used-in-covid-19-treatment?t=1638212735821