Prediction: Vitamin D levels will continue dropping for decades

Increased Air conditioning

Increased purchase and use of air conditioning - 2 charts

Far more hot days and air conditioning (and thus less vitamin D) later this century – June 2014

Global warming

Global warming ==> buy more air conditioner and leave them on longer

July was the hottest month ever in recorded history FastCompany August 2019

    "In Greenland, an estimated two billion tons of ice melted on a single day."

" number of days that feel hotter than 100 degrees will double by the middle of the century in the U.S"

Indoors more

internet,

health problems,

not feel safe in the city,

fewer parks to go to in the city

Increased pollution ==> less UV gets to the ground

Increased pollution ==> decrease desire to get out

Increase pollen

Many women want whiter skins

Too stressed to take time out to relax outdoors

More elderly

Get outdoors less than when younger

Generate less Vitamin D from the sun which they do get out

Want to avoid skin cancer

More obesity

Less likely to go outdoors, also reduces D getting to the blood

• Reasons for low response to vitamin D, chart of decline

• 43 reasons for Vitamin D deficiency

• Vitamin D levels have been crashing since 1995 (Polish Children, Elite Military, etc)

  • Polish Children + US Military + US Whites
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