[DOC] [TLE] Vitamin D - Wikipedia [PAR] Dermal synthesis of vitamin D from cholesterol is dependent on sun exposure (specifically UVB radiation). Vitamin D from the diet or dermal synthesis from sunlight is biologically inactive; activation requires enzymatic conversion (hydroxylation) in the liver and kidney. [DOC] [TLE] Sunlight, UV-radiation, vitamin D and skin cancer: how much ... - NCBI [PAR] Sunlight, UV-radiation, vitamin D and skin cancer: how much sunlight do we 
need? ... During exposure to sunlight, the utraviolet B photons enter the skin and
... [DOC] [TLE] Overview of Vitamin D - Dietary Reference Intakes for Calcium and ... [PAR] Flow diagram showing that sunlight on the skin is the first step in vitamin D .... 
from 7-dehydrocholesterol following exposure to ultraviolet B (UVB) radiation 
with... [DOC] [TLE] Array | Vitamin D Council [PAR] Human skin can make large amounts of vitamin D when lots of skin is exposed and the sun is high in the sky. Your body is designed to get the vitamin D it needs by producing it when your bare skin is exposed to sunlight. The part of the sun's rays that is important is ultraviolet B (UVB). [DOC] [TLE] Vitamin D | Linus Pauling Institute | Oregon State University [PAR] Upon exposure to UVB radiation, previtamin D3 is ... Upon exposure to sunlight, 
vitamin D3 can also be degraded to other... [DOC] [TLE] Sunlight and vitamin D for bone health and prevention of ... [PAR] During exposure to sunlight, 7-dehydrocholesterol (7-DHC) in the skin absorbs 
solar UVB radiation and is converted to previtamin D3 (preD3). Once formed... [DOC] [TLE] How Much Skin Needs to Be Exposed for Vitamin D? - Healthy Eating [PAR] Our body takes ultraviolet radiation from the sun and uses it to ... ... Experts say 
not to intentionally expose your skin to sunlight when the UV index is less than 3. [DOC] [TLE] Vitamin D and your health: Breaking old rules, raising new hopes ... [PAR] Because pigmentation can reduce vitamin D production in the skin by over 90%, 
nonwhite ... Limited exposure to sunlight heads the list. ... use sunscreens to 
protect our skin from the harmful effects of ultraviolet radiation (see "Suncreens"). [DOC] [TLE] Vitamin D and the skin: Focus on a complex relationship: A review [PAR] Feb 8, 2014 ... The first reference to the physiological effect of sunlight on vitamin D was ... A 
whole body exposure to UVB radiation inducing the light pink... [DOC] [TLE] Sunlight & Vitamin D Production in the Human Body [PAR] Vitamin D3 is synthesized in the skin once your unprotected skin receives 
exposure to sunlights UV rays. The sun emits three different types of radiation, 
UVA,... [DOC] [TLE] What Role Does the Sun Play in Vitamin D Synthesis? - Science ... [PAR] Jun 5, 2015 ... Rather, ultraviolet radiation converts the vitamin D in your skin to its ... 10 to 15 
extra minutes in the sun daily to make enough active vitamin D? ... Certain 
members of the population who don't get much sun exposuresuch... [DOC] [TLE] Vitamin D Insufficiency Due to Insufficient Exposure to Sunlight and ... [PAR] There are four forms of vitamin D. The first form, cholecalciferol, is made by the 
skin when it is exposed to direct sunlight containing UVB rays. Cholecalciferol is
... [DOC] [TLE] Sunlight - It Does Your Body Good - Mercola [PAR] Dec 27, 2015 ... Sunlight makes vitamin D in your skin; it also makes beta-endorphins, ... When 
your skin is exposed to UVB radiation, that gene is turned on. [DOC] [TLE] Maximizing Your Vitamin D from Safe Sun Exposure - Mercola [PAR] Mar 26, 2012 ... Getting enough vitamin D from sun exposure is a good idea, but if you ... forms 
when your skin is exposed to UVB radiation from the sun (or a safe tanning bed). 
... Why Vitamin D Supplements Are NOT the Same as Sunlight [DOC] [TLE] Vitamin D and Sunlight Exposure - main menu [PAR] It is a chemical that we make on our skin from sun exposure. ..... The healing rays 
of natural sunlight (that generate vitamin D in your skin) cannot penetrate glass... [DOC] [TLE] Vitamin D

Question: Vitamin D is activated when the skin is exposed to this radiation
Answer: ultraviolet