Research
Micronutrients & recovery
General medical inpatients have a high prevalence (57%) of vitamin D deficiency, defined as serum 25-hydroxyvitamin D ≤ 15 ng/mL, regardless of whether they meet standard risk factors or consume recommended daily amounts of vitamin D.
If you are hospitalized, ask your doctor to check your Vitamin D levels (25-hydroxyvitamin D). Even if you are young, healthy, and eat a good diet, you may be deficient. The standard recommended daily intake may not be enough for you, especially in winter or if you have limited sun exposure. Do not assume your multivitamin is sufficient.
GoodSupportsHIGH confidence
A total of 164 patients (57 percent) were considered vitamin D–deficient (serum concentration of 25-hydroxyvitamin D, ≤ 15 ng per milliliter)... Inadequate vitamin D intake, winter season, and housebound status were independent predictors of hypovitaminosis D in a multivariate model.
Why this rating
Large sample size (n=290), prospective observational design, rigorous laboratory assays, published in NEJM.
Source
Hypovitaminosis D in Medical Inpatients
Melissa K. Thomas et al. · New England Journal of Medicine · 1998
cross_sectional · n=290Cited 1,437×
Read the paper This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →