Peeling a Grape Ups Your BG Test Results


By: Linda von Wartburg

According to a new study published in Diabetes Care, your finger-prick blood glucose test may be “abnormally and significantly high” if you test after handling fruit without first scrubbing your hands thoroughly and vigorously. 

The Tokyo study, precisely titled “Glucose Monitoring After Fruit Peeling: Pseudohyperglycemia When Neglecting Hand Washing Before Fingertip Blood Sampling,” tested ten non-diabetic volunteers who had normal blood glucose levels of approximately 90 mg/dL.

The volunteers were asked to peel an orange, a kiwi, or a grape. When they then tested their blood glucose without washing their hands, their blood glucose meter produced results of 170, 180, and 360 mg/dL respectively. Even after they swabbed their test finger with alcohol five times, the meter results were inaccurately high. It was only after a thorough handwashing with tap water that they got an accurate result from their meter. 

The researchers concluded, “To avoid overestimation of blood glucose using portable monitors, the hands should be washed before monitoring capillary BG, especially after fruit has been handled.”



Diabetes Care

CTV News



Diabetes Health Medical Disclaimer
The information on this site is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images, and information, contained on or available through this website is for general information purposes only. Opinions expressed here are the opinions of writers, contributors, and commentators, and are not necessarily those of Diabetes Health. Never disregard professional medical advice or delay seeking medical treatment because of something you have read on or accessed through this website.