Thank you for your inquiry.
There are a number of excellent sources detailing methods for dosing vitamin D in children. These are available to you online without charge. Below you will see links to such references.
In Pediatrics 2008, there is an extensive review of vitamin D deficiency, and contained within this review are dosing regimens. The Mayo Clinic also has recommendations for replacement, as does the School of Medicine (Barts) in London. By clicking on the links below, you will be able to pull up each of these references without charge.
As you will see, replacement and monitoring can be somewhat complicated if one takes into consideration the nuances of sunlight, diet, and vitamin D metabolism.
To obtain a clinical perspective on this for you, I have asked Dr. Michael Blaiss, who has recently reviewed the literature regarding vitamin D replacement and asthma, to comment on his approach to vitamin D supplementation in asthmatic children. When I hear from Dr. Blaiss, I will forward his response to you. In the meantime, I think you will gain a great deal of information from the links copied below.
Thank you again for your inquiry and we hope this response is helpful to you.
Pediatrics 2008;122;398. Vitamin D Deficiency in Children and Its Management: Review of Current Knowledge and Recommendations
Source: School of Medicine, Barts London
Source: Mayo Clinic
Phil Lieberman, M.D.
We received a response from Dr. Michael Blaiss. Thank you again for your inquiry and we hope this response is helpful to you.
Phil Lieberman, M.D.
Response from Dr. Michael Blaiss:
There is definite interest in the role of Vitamin D and atopy and asthma. Many articles have been published showing a relationship with severity of asthma, asthma exacerbation, and exercise-induced bronchoconstriction and decreases in serum Vitamin D. Of course this does not prove a cause and effect. So until we see the results of double-blind placebo control trials with Vitamin D supplementation in children, we will not truly know if it is beneficial or not in improving asthma control.
As far as dosing, I agree with the Pediatric 2008 article by Misra et al:
We recommend treating infants and children who are vitamin D insufﬁcient or deﬁcient with 1000 IU/day of vitamin D for infants _1 month old, 1000 to 5000 IU/day for children 1 to 12 months old, _5000 IU/day for children _12 months old, and >5000 after the age of 1. Vitamin D levels should subsequently be maintained with 400 IU of vitamin D supplementation per day. For patients who demonstrate poor compliance, a high dose of vitamin D may be given as a single dose or repeated intermittently.
Usually it will take up to 2 to 3 months in children deficient to get a therapeutic level so watch serum levels.
Brehm JM, Celedon JC, Soto-Quiros ME, et al. Serum vitamin D levels and markers of severity of childhood asthma in Costa Rica. Am J Respir Crit Care Med. 2009;179:765-771.
Alyasin, S., T. Momen, et al. (2011). The relationship between serum 25 hydroxy vitamin d levels and asthma in children. Allergy, Asthma & Immunology Research 3(4): 251-255.
Chinellato, I., M. Piazza, et al. (2011). Vitamin D serum levels and markers of asthma control in Italian children. The Journal of Pediatrics 158(3): 437-441.
Chinellato, I., M. Piazza, et al. (2011). Serum vitamin D levels and exercise-induced bronchoconstriction in children with asthma. The European Respiratory Journal: official journal of the European Society for Clinical Respiratory Physiology 37(6): 1366-1370.
Michael S. Blaiss, M.D.