2X less vitamin D from the sun for seniors

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 {[tiki-download_file.php?fileId=2163]

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

See also Vitamin D Life

• 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 items

• Items in category Seniors and Vitamin D 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