How do I know if I am getting enough vitamin D from the sun?
To now if you are getting enough vitamin D from the sun, you need to have a 25(OH)D blood test. It is the only method that can be used to measure the amount of vitamin D in one's body.
5-30 minutes outside, twice weekly is good.
to know you see changes in you body and more energy also and you can check with you doctor and he exam you
Check out this chart! It tells you how much sun to get to meet your vitamin D requirements based on your skin color and the UV rating of your location! http://gbhealthwatch.com/Nutrient-VitaminD-Overview.php