Seasonal Effect on Vitamin D Deficiency

Does season affect your chance of vitamin D deficiency? This chart demonstrates the profound influence that season can have on vitamin D levels and risk of deficiency, which increases with increased distance from the...

Infant Morbidity Chart

A study recently published by Srinivasan et al. looked at 25(OH)D serum levels of 80 preterm infants (gestation less than 34 weeks). Objectives of the study were to determine the vitamin D levels in...

Moving Research into Practice Charts Booklet

Moving Research into Practice Charts Booklet This booklet contains charts based on data collected in the GrassrootsHealth study as well as several studies by our scientists and other vitamin D researchers.  It is a...

Scientists’ Call to D*action

Scientists’ Call to D*action A Scientists’ Call to Action has been issued to alert the public to the importance to have vitamin D serum levels between 40 and 60 nanograms/milliliter (100-150 nanomoles/liter) to prevent...

Vitamin D Deficiency for Women

Rates of Vitamin D Deficiency for US Women of Childbearing Age (NHANES data) Chart showing 25(OH)D by race/ethnicity for U.S. women aged 18-45 years (2005-2006 NHANES, N=1479). Format: PDF Dimensions: 8.5 x 11 inches...

Pain Chart

Pain Level vs Serum Level Using data provided by participants in the D*action study, GrassrootsHealth was able to compare 25(OH)D serum levels with location and severity of pain as reported by participants. The average...