[Karl Spooner]

" more than six times the daily 600 IUs the Institute of Medicine currently recommends for most adults and children -- received the most benefit."

The FDA always recommends concentration camp ration amounts of vital nutrients. Good for business.

.

"Sensible sun exposure, especially between the hours of 10:00 am and 3:00 pm produces vitamin D in the skin that may last twice as long in the blood compared with ingested vitamin D. [4] If sun exposure produces slight pinkness, the amount of vitamin D produced in response to exposure of the full body is equivalent to ingesting 10,000-25,000 IU."

https://www.medscape.com/answers/128762-54304/what-is-the-recommended-sun-exposure-for-production-of-vitamin-d

[kiryandil]

https://www.suncalc.org

[kiryandil]

In the box on the left side of the screen, look for "Altitude:"

The sun's altitude must be 50 degrees or higher to allow the vitamin D absorption affect.

At lower than 50 degrees, the sun's angle of incidence to the atmosphere bounces the good UV rays off.