, PKUK, SNHS Dip.(Holistic Nutrition)
Kinesiologist
Nutritional Therapist
Vitamin D and the Sun
1. Use this site for determining the longitude and latitude of a location
http://itouchmap.com/latlong.html ((latitude North is positive, South
negative and longitude West of Greewich is negative, East positive)
2. Put your longitude and latitude into Form B on this site and you will get a
table. Look at the Altitude column and the times that the sun is at an altitude
of 50 or more is when you need to get out in the sun to generate vitamin D in
your skin http://aa.usno.navy.mil/data/docs/AltAz.php
This site corrects for daylight saving time
If the angle of the sun as it related to your specific place on the planet is below 50
degrees then the atmosphere of the sun filters out all the UVB radiation which is
responsible for yor body making vitamin D from cholesterol. So even if 80
degrees and sunny there isn’t enough UVB for your body to produce vitamin D
 If you go out in the sun when there isn’t enough UVB then the UVA will
increase your risk of getting skin cancer
 If the altitude of the sun is at least 50 degrees then you still have to have
sun, unobscured by cloud or rain as clouds are another filter for UVB
N.B. When making Vitamin D from sunlight it takes 48 hours to penetrate
the skin and get into the system. Do not use soap on your skin for 48 hours
after sun exposure, just use water and restrict soap to key areas only e.g
underarms, feet
If you don’t get enough sun to make Vitamin D in your skin throughout the year
then you may need to take a Vitamin D3 supplement.
You need to have your blood levels measured to see what dose you need.
However, research shows that an adult weighing 150 1b/10st 101b needs an
average dose of vitamin D needed is 8,000 units. Way more than we are led to
believe. (Mercola.com)
Vitamin D3 Supplement – this is a recommended source
http://www.vitalminerals.org/zen/index.php?main_page=index&cPa
th=2