From Solar UV Doses of Adult Americans and Vitamin D3 Production – Dec 2011
Figure 1. The percent drop in the ability to make vitamin D3 in human skin with age.
We normalized values to 100% using the children's values (0-20 yr).
The data plotted is the average of vitamin D3 formed in the epidermis and dermis from 0-20 yr (100%), 22-40 yr (83%), 41-59 yr (66%) and 60+ yr (49%); calculated from the data in Figure 1 of MacLaughlin and Holick (1985).
Note that some seniors over 70 yr make less than 25% of the vitamin D that children <21 yr can make.67 {In VitaminDWiki}
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The above graph was taken from 1985 publication
for skin type III
Wonder if there was any difference with cholesterol in the skin, which is a precursor of vitamin D
see: Overview of Cholesterol and Vitamin D
Publication PDF is attached at the bottom of this page
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See also VitaminDWiki
- Seniors, like everyone else, need vitamin D and should avoid sunburns – 2011 Dr. Glossman
Does not seem to mention how much of a reduction vs age. - How many minutes of sun do I need – age, skin color, UV index – Nov 2014
- 50% more if > 59 years old - does not appear to state % if > 70
- Optimize vitamin D from the sun
- All items in category Noontime Sun and vitamin D
327 items - Items in category Seniors and Vitamin D
431 items - Intestines need more vitamin D as you age – June 2012
- Vitamin D from psoriasis lamps, tanning beds, and the sun – Jan 2012
See also web
- Sunshine Prescription June 2012
2X less vitamin D from the sun for seniors - Dec 20118708 visitors, last modified 11 Mar, 2019, This page is in the following categories (# of items in each category)Attached files
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