Hi, just wanted to report what I think is a positive experience of using an UVB lamp for recovering a sever vitamin D deficiency. At the end of June 2015 I was tested and found literally no vitamin D in my body, the serum level of 25OH-D was zero. Naturally the doctor wanted to immediately start with high dose (50-100K IU) shots to remedy the situation but I have a very bad history with high dose shots of anything, so I passed and looked for alternatives. Since it was summer the obvious choice was to be in the sun for at least 30-50min a day, every day, with no protection. I sticked with this "protocol" for all July and August, exposing the legs directly and the rest indirectly to avoid being overwhelmed by the heat. Additionally I bought a narrow band UVB lamp from Amazon, this model: http://www.amazon.co.uk/gp/product/B004NOPC9S?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00 and started using it every day for a few minutes, slowly building up the tolerance, until I reached a total exposure time of 20 minutes (5m legs front + 5 legs back + 5m chest + 5 back). and I kept doing this for all September and October as substitute for sun exposure. Today I got back the vitamin D results and, to my surprise, the level is now 45... which I didn't expect considering it usually takes 6-12 months to recover from a severe deficiency. In any case I think the lamp has helped quite a bit especially in the last 2 months and in the cloudy days or when I was not able to be out in the sun. The UVB lamp I linked is definitely not cheap and I wouldn't have bought it if I tolerated any decent amount of oral D3. Unfortunately my body rejects oral and even transdermal D3... so I had no choice and wanted to avoid shots, if possible. I've read several other people in this forum have similar issues with D3 supplements, so maybe this could be an alternative solution to recharge your vitamin D levels. I will keep using the lamp 2-3 times a week to maintain the current level and re-check during spring time next year. Hope this helps people with similar issues Cheers p.s. = it goes without saying that I have no interest or agenda in promoting the specific brand/model of UVB lamp.