Maintenance of long-term adequate levels of vitamin d lowers HbA1c in African American patients with type 2 diabetes.

Objectives: We examined the long-term effects of enhanced Vitamin D (VitD) supplementation on parameters of type 2 diabetes mellitus (T2DM): serum hemoglobin A1c, low density lipoprotein, high density lipoprotein, and triglyceride for the purpose of determining beneficial VitD levels in T2DM African Americans (AA).

Design And Methods: Following inclusion criteria, retrospective charts of patients aged > or = 30 years were reviewed. VitD supplementation was given to patients as part of drug regimen over a three year continuum.

Significance of plasma C-peptide in obese African American adolescents.

Background: C-peptide blood levels can indicate whether or not a person is producing insulin and roughly how much. C-peptide is secreted as a byproduct of the biosynthesis of insulin from proinsulin. C-peptide has proposed biological activity and a well-established diagnostic value.