World Health Organization report from 2006
CLICK HERE for PDF
optimal = Not too much and not to little UVB
Summary: Daily Adjusted Life Years
If could get less UVB - 1.5 million DALYs could have been avoided
If get no UVB 3,304 million DALYs would have been lost due to vitamin D deficiency diseases – rickets, osteomalacia and osteoporosis.
= 2200X more disability if have no UVB than if have too much UVB
What the above chart should look like using the WHO data
Figure 2.1 Schematic diagram of the relation between ultraviolet radiation (UVR) exposure and the burden of disease
A = Vitamin D insufficiency
B = Optimal
C= Skin cancers, eye disease
Horizontal line = Personal exposure to UVR relative to skin type
Points A and C represent inappropriate UVR exposure. Fair-skinned populations in Australia with high outdoor UVR exposure typify point A.
Point C represents people with insufficient UVR exposure, whose dietary vitamin D intake will also be important in determining their vitamin D status.
Point B represents optimal UVR exposure: a person with careful titration of correct UVR dose for skin type.
from: Lucas, RM and Ponsonby, AL. Ultraviolet radiation and health: friend and foe. MJA 177:594-598
Diseases with increasing incidence where UVR exposure/vitamin D is inadequate:
Autoimmune diseases: Multiple sclerosis Type 1 diabetes Rheumatoid arthritis
Cancers: Prostate Breast cancre Colorectal cancer Ovary cancer Non-Hodgkin lymphoma
Psychiatric disorders: Seasonal affective disorder Mood disorders Schizophrenia
Diseases with increasing incidence where UVR exposure is excessive
Acute macular degeneration
Posterior subcapsular cataract
Diseases CAUSED by UVB = too much
The WHO paper states that the 2200X did not even consider DALYs due to
cancers of the colon, breast, prostate, ovary and others;
autoimmune diseases such as multiple sclerosis, type 1 diabetes and rheumatoid arthritis;
cardiovascular diseases such as hypertension, acute stroke and coronary artery disease;
endocrine disorders such as type 2 diabetes;
psychiatric disorders and disorders of mood;
lymphomas including both Hodgkin and non-Hodgkin lymphoma.
See also VitaminDWiki
- Overview UV and Vitamin D
- Which Is Worse - Avoiding Sunlight or Vitamin D Deficiency – April 2019
- Low UVB (thus low Vitamin D) is linked to many diseases – Grant Jan 2016
- Less Solar Radiation was associated with more Cancer - 1941
- Is too much vitamin D bad – possible causes and cures
- Even if a J curve exists, it is 50X better to give vitamin D than not give it – May 2013
Article Title: When Is a U-Curve Actually a J-Curve? Is It Really Too Much of a Good Thing?
- All items in UV and D category
- UV overview at WHO -with infographic
Image from above reference
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