"The daily #dose that is recommended today, internationally, it's a paltry dose, much below the #physiological dose. The physiological dose has been recently recognized to be minimally 7,000 daily units for adults with normal body mass index, the same amount that one produces in just 10 to 20 minutes of exposure to the sun, depending on the extent of exposed body surface, body position (basking or standing), skin pigmentation, skin age and sun positioning (which changes the amount of UVB – the vitamin D-producing radiation). Sunscreen blocks the body's ability to produce vitamin D, and its use should be delayed until enough vitamin D has been generated. So 10,000 is also a physiological dose, not a super dose. However most doctors consider this dose potentially toxic. Today the recommended dose is still 600 international units despite being the result of a #miscalculation (see link below). So, 600 international units are recommended but if a person is exposed to the sun for just 20 minutes, he / she may easily produce 10,000 units! This is an evident difference between medical practice and updated scientific knowledge."
Cicero Coimbra, MD, PhD.
Vitamin D - The Sun Hormone
"A Statistical Error in the Estimation of the Recommended Dietary Allowance for Vitamin D"
The FDA in 2018 quietly increased the amount of recommended daily values from 400 IU to 20 mcg (800 IU).
(see Table 3 under "** DV" daily values)