Yet another UV monitor for vitamin D to avoid – Sunsprite
Sunsprite Does not appear to adjust for
UVB vs UVA – which varies a LOT during the day
Age
Amount of clothing
Skin color
Weight
They also recommend staying out of the noonday sun – the very time when you can get the most Vitamin D
See also VitaminDWiki
Another vitamin D meter fails to distinguish UVB from UVA – Violet – Dec 2014
Vitamin D Testers coming soon (low cost and easy) - June 2014
A wrist-watch which measures UVA plus UVB - should NOT be used to increase vitamin D - June 2014
20 cent vitamin D pill similar to 2 hours sunbathing at 60 degree latitude – RCT Aug 2013
60 minutes of sunlight needed to decrease vitamin D deficiency in sunny climate – Dec 2012