A Northern Bahamian Rock Iguana cranes its neck to eat a grape that’s speared on the end of a stick.
Grape-Doling Tourists Gave Endangered Iguanas High Blood Sugar
Research finds that a high-sugar diet supplied by tourists is giving Bahamian rock iguanas the lizard equivalent of high blood sugar.
ABOVE: © ISTOCK.COM, JANALYNN
Grape-Doling Tourists Gave Endangered Iguanas High Blood Sugar
Grape-Doling Tourists Gave Endangered Iguanas High Blood Sugar

Research finds that a high-sugar diet supplied by tourists is giving Bahamian rock iguanas the lizard equivalent of high blood sugar.

Research finds that a high-sugar diet supplied by tourists is giving Bahamian rock iguanas the lizard equivalent of high blood sugar.

ABOVE: © ISTOCK.COM, JANALYNN

Glucose metabolism

A black mouse runs on a yellow and green spinning wheel against a blue background
Exercising During Pregnancy Protects Mouse Offspring
Jack J. Lee | Aug 1, 2021
Obese mice that exercised while pregnant gave birth to pups that grew up free of the metabolic issues present in the adult young of sedentary obese mothers—possibly by staving off epigenetic changes to a key metabolic gene.
A bar of milk chocolate with the foil peeled back and a bite taken out
Q&A: Eating Milk Chocolate in the Morning Boosts Fat Metabolism
Amanda Heidt | Jun 30, 2021
A study of 19 postmenopausal women found that eating a bar of chocolate in the morning affected their bodies differently than eating it at night, but neither led to weight gain.
a young woman pedals an exercise bike while wearing a mask to monitor oxygen consumption
Extreme Exercise Carries Metabolic Consequences: Study
Shawna Williams | Mar 23, 2021
Healthy people put through high-intensity interval training, or HIIT, displayed insulin resistance and mitochondrial dysfunction after working out excessively.
Infographic: The Role of Circadian Clocks in Muscle
Diana Kwon | Sep 1, 2018
Timekeepers in muscle help mediate metabolism, and may influence neurological processes such as sleep.
Image of the Day: Glucose Sensor 
The Scientist Staff, The Scientist Staff | Jan 2, 2018
Scientists build a biosensor skin patch for noninvasive glucose monitoring. 
Will the Noninvasive Glucose Monitoring Revolution Ever Arrive?
Catherine Offord | Oct 12, 2017
A needle-free alternative to the finger-prick test would be a godsend for many sufferers of diabetes, but the industry has yet to clear the technological hurdles.
Quantifying Consciousness
Tanya Lewis | May 26, 2016
Overall brain metabolic rate can distinguish between pathological states of human consciousness, a study shows.
Newly Discovered Hormone Explains Disease
Kerry Grens | Apr 15, 2016
Patients with neonatal progeroid syndrome lack a glucose-releasing hormone, while people with insulin resistance have an abundance.
The 6,000-Calorie Diet
Jef Akst | Nov 1, 2015
Overeating and inactivity lead to insulin resistance in just days—and oxidative stress is to blame.
Sweet and Low
Ashley P. Taylor | Oct 1, 2015
Glucose activates sleep-promoting neurons in the mouse hypothalamus.
Circadian Clock Controls Sugar Metabolism
Anna Azvolinsky | Apr 17, 2015
The body’s circadian rhythm has more of an effect on glucose tolerance than one’s eating and sleeping patterns, a study shows.  
Nourishing the Aging Brain
Morten Scheibye-Knudsen | Mar 1, 2015
Research reveals how the brain changes as we age and hints at ways to slow the decline.
As the Brain Ages
Morten Scheibye-Knudsen | Feb 28, 2015
See human brains age in week-by-week time lapse images that divulge the existence of tiny strokes that damage white matter.
Brains in Action
Anna Azvolinsky | Nov 1, 2014
An inspiring lecturer turned Marcus Raichle’s focus from music and history to science. Since then, he has pioneered the use of imaging to study how our brains function.
Sugar Substitutes, Gut Bacteria, and Glucose Intolerance
Anna Azvolinsky | Sep 17, 2014
The consumption of artificial sweeteners results in glucose intolerance mediated by changes in the gut microbiota in both mice and humans, researchers report.
All In Proportion
Savraj S. Grewal | Mar 1, 2013
Drosophila insulin-like peptides (dILPs) regulate part of the signaling pathway that helps keep organs growing in proportion during development.
Instant Messaging
Savraj S. Grewal | Mar 1, 2013
During development, communication between organs determines their relative final size.
Fat's Immune Sentinels
Justin Odegaard and Ajay Chawla | Dec 1, 2012
Certain immune cells keep adipose tissue in check by helping to define normal and abnormal physiological states.
In the Long Run
Mary Beth Aberlin | Dec 1, 2012
Can emulating our early human ancestors make us healthier?