Pharmacokinetics of a single, large dose of cholecalciferol.
Ilahi M, Armas LA, Heaney RP.
Am J Clin Nutr. 2008 Mar;87(3):688-91.
PMID: 1832660
Conclusions: Cholecalciferol (100 000 IU) is a safe, effective, and simple way to increase calcidiol concentrations. The dosing interval should be ≤2 mo to ensure continuous serum calcidiol concentrations above baseline.
Our study highlights that 100 000 IU cholecalciferol is a safe, efficient, and cost-effective means to increase calcidiol concentrations in the elderly. From this study we can safely recommend 100 000 IU cholecalciferol dosed every 2 mo in persons with moderate baseline calcidiol concentrations. However, in those persons with baseline calcidiol concentrations < 20 ng/mL, even this large dose will not adequately raise their calcidiol concentrations.
Martineau AR, Wilkinson RJ, Wilkinson KA, Newton SM, Kampmann B, Hall BM, Packe GE, Davidson RN, Eldridge SM, Maunsell ZJ, Rainbow SJ, Berry JL, Griffiths CJ.
A single dose of vitamin D enhances immunity to mycobacteria.
Am J Respir Crit Care Med. 2007
Twice single doses of 100,000 IU of vitamin D in winter is adequate and safe for prevention of vitamin D deficiency in healthy children from Ushuaia, Tierra Del Fuego, Argentina.
Tau C, Ciriani V, Scaiola E, Acuña M.
J Steroid Biochem Mol Biol. 2007 Mar;103(3-5):651-4. Epub 2007 Jan 25.
PMID: 17257830
doi:10.1016/j.jsbmb.2006.12.027
These results disclosed that to prevent vitamin D deficiency for children at zones of risk at the south of our country, double supplementation of 100,000 IU of vitamin D during autumn and winter, would be adequate and safe.
Effects of vitamin D and calcium supplementation on falls: a randomized controlled trial.
Bischoff HA, Stähelin HB, Dick W, Akos R, Knecht M, Salis C, Nebiker M, Theiler R, Pfeifer M, Begerow B, Lew RA, Conzelmann M.
J Bone Miner Res. 2003 Feb;18(2):343-51.
PMID: 12568412
A single intervention with vitamin D plus calcium over a 3-month period reduced the risk of falling by 49% compared with calcium alone. Over this short-term intervention, recurrent fallers seem to benefit most by the treatment. The impact of vitamin D on falls might be explained by the observed improvement in musculoskeletal function.
It seems not a single day passes that I don't learn something new about this unique hormone (mis)named "vitamin D." \nFrom its humble beginnings recognized only as the factor responsible for bone maturation (with deficiency leading to childhood rickets), vitamin D now commands a recognized role in almost every conceivable aspect of health and disease. \n