The purpose of this study is to evaluate the effect of zinc supplementation on insulin secretion by genotype of SLC30A8.
Name: Zinc acetate
Allocation: Non-Randomized
Single Group Assignment
There is one SNP
Inclusion Criteria: - aged 21-70 years - Amish decent - genotyping of rs13266634 of SLC30A8 gene - previously consented to contact for future studies and future use of DNA Exclusion Criteria: - Subject is a first-degree relative of another subject with the same SLC30A8 genotype - diabetes mellitus (by history, treatment or random BG>200 mg;dl) - gastrointestinal disease causing nausea, vomiting, or diarrhea including inflammatory bowel disease by history.
- rheumatoid arthritis by history - albumin < 3.5 g/dL - hemochromatosis by history - hematocrit <34% - liver disease by history - alanine aminotransferase or aspartate aminotransferase greater than 2.5 times normal - renal failure by history - estimated glomerular filtration rate < 60 mL/min by MDRD equation - use of thiazide diuretic and unwilling to discontinue if deemed safe in the opinion of the treating physician and study physician for 1 week prior to protocol initiation - use of systemic corticosteroid and unwilling to discontinue if deemed safe in the opinion of the treating physician and study physician for 1 week prior to protocol initiation - use of highly-active antiretroviral medications - use of antipsychotic medications - use of quinolone antibiotics - use of tetracycline antibiotic and unwilling to discontinue if deemed safe in the opinion of the treating physician and study physician for 1 week prior to protocol initiation - use of chelation therapy in the past month - unwilling to withdraw from supplements for 1 week prior to the study and throughout study - abnormal thyroid stimulating hormone (TSH) level - serious disease precluding participation - reported pregnancy or positive urine hCG test - cancer diagnosis in past 2 years - breastfeeding - use of denture adhesive Inclusion Criteria: - aged 21-70 years - Amish decent - genotyping of rs13266634 of SLC30A8 gene - previously consented to contact for future studies and future use of DNA Exclusion Criteria: - Subject is a first-degree relative of another subject with the same SLC30A8 genotype - diabetes mellitus (by history, treatment or random BG>200 mg;dl) - gastrointestinal disease causing nausea, vomiting, or diarrhea including inflammatory bowel disease by history.