May I remind readers that 25(OH)D testing is available worldwide for just $40
The Vitamin D testing scenario is much the same in the UK. Although I have asked for and had a couple of 25(OH)D tests from my GP I think this was the exception rather than the rule. I've friends and relatives who have asked for a test and been refused. I've another relative who had a Grassrootshealth test that showed 10ng ~ 25nmol/l (severely deficient) who was told 800iu/d will solve the problem. (standard treatment for deficiency = 50,000iu/weekly for 8 weeks then 2,000-7,000 IU vitamin D per day should be sufficient to maintain year-round 25(OH)D levels between 40-70 ng per mL.