The action spectrum for psoriasis corresponds to the best wavelengths for Vitamin-D production. – Patients beginning UVB phototherapy for psoriasis are typically Vitamin-D deficient. What is the best fluorescent UV lamp type for Vitamin D production? Interestingly, this region corresponds very nicely with the Psoriasis Action Spectrum shown in green (296 to 313 nm). The effect of solar radiation on vitamin D synthesis depends to some extent on the initial vitamin D levels. The best way to obtain precise personal UV exposure is dosimeters 47.
The full blend of light wavelengths in sunlight is one of the reasons why regular sun exposure is such an important part of a healthy lifestyle. When we talk about sun exposure to optimize vitamin D production, we’re really only looking at a small portion of the action spectrum of light, because ultraviolet B (UVB) radiation is the only portion able to photosynthesize vitamin D in your skin. Narrow-band UVB clears psoriasis faster and produces longer remissions than broadband UVB. The most well-known source of vitamin D is via synthesis in the skin induced by sun exposure. Absorption of UVR at wavelengths up to about 320 nm converts the O3 back to O2 and O (Chapman 1930). An action spectrum is a plot of the relative effectiveness of radiation of different wavelengths to produce a given biological effect. The acute reactions considered will be sunburn, tanning and vitamin D production.
A) Action spectra associated with erythema, nonmelanoma skin cancer,and the production of vitamin D3 with respect to the spectrum of incident solar radiation during the midday hours. In the spectrum for vitamin D synthesis, UV-B radiation is more heavily weighted, while the spectrum for erythemal action also includes UV-A radiation. In 1990, Morimoto et al58 failed to find greater vitamin D deficiency in psoriasis patients than controls. UVR exposure to high exposure, plotted against the corresponding disease risks. New sunscreen offers vitamin D production with UV protection. In theory, the judicious choice of compounds that have fewer UV-absorbing properties at wavelengths near the peak action spectrum for previtamin D3 production, i. An action spectrum indicates which wavelengths produce a photobiologic response most effectively and is plotted as the reciprocal of the minimum effective fluence versus wavelength. Optimal vitamin D blood levels are essential for good bone health and increasingly associated with a myriad of other potential health benefits. For example, skin with scales, as in psoriasis, scatters more light than does normal skin.
Your Body Needs Full Spectrum Light For Optimal Function
The higher energies of the ultraviolet spectrum from wavelengths about 120 nm to 10 nm (‘extreme’ ultraviolet) are ionizing, but, due to this effect, these wavelengths are absorbed by nitrogen and even more strongly by dioxygen, and thus have an extremely short path length through air. Ultraviolet is also responsible for the formation of vitamin D in organisms that make this vitamin (including humans). Electric arcs produce UV light, and arc welders must wear eye protection to prevent welder’s flash. Ultraviolet radiation has other medical applications, in the treatment of skin conditions such as psoriasis and vitiligo. A good, general sequence to remember is radio waves, microwaves, infrared, light, ultraviolet, x rays, gamma rays. The middle bands are sometimes identified by their relative wavelengths. One positive affect of moderate doses of UVB is that in induces the production of vitamin D and vitamin K. Used clinically in the treatment of certain skin complaints (such as psoriasis) and to induce vitamin D formation in patients that are deficient. UV radiation is the portion of the EM spectrum between X-rays and visible light. UVA rays have the longest wavelengths, followed by UVB, and UVC rays which have the shortest wavelengths. The World Health Organization (WHO) has developed an internationally recognized system of colors corresponding to levels of the UVI. In this region, the atmosphere absorbs all radiation of wavelengths below 280 nm, and only UVB (280-320 nm) and UVA (320-400 nm) radiation reach the ground. Vitamin D is produced almost exclusively by UVB (1), and so are both forms of non-melanoma skin cancer: basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) (2-5). 12), and therefore the action spectrum of vitamin D generation is also important in the immunological effects of solar radiation. Thus, the best time for sun exposure in view of a high vitamin D yield at a minimal CMM risk, is noon. Avoiding Sun exposure leads to vitamin D deficiency which is associated not only with rickets and osteomalacia, but also with increased risk of cardiovascular disease, multiple sclerosis, rheumatoid arthritis, diabetes, influenza, many types of cancer and adverse pregnancy outcomes. Action spectra relevant for health are described.