Confirmed: Fatty Liver Ups Type 2 Diabetes Risk

If you get diagnosed with a fatty liver during a routine check-up, sit up and take notice. Fat deposits in liver are an invitation to diabetes. Although fatty liver and insulin resistance are known to be associated, the relationship between the two in the development of type 2 diabetes mellitus (T2DM) is unclear.

However, a recent study published in The Endocrine Society’s Journal of Clinical Endocrinology and Metabolism (JCEM) found that individuals with fatty liver were five times more likely to develop type 2 diabetes than those without fatty liver.

This higher risk seemed to occur regardless of the patient’s fasting insulin levels, which were used as a marker of insulin resistance. People who consume more oily food, have a sedentary lifestyle, especially those who consume large quantities of alcohol, are at risk of getting the disease.

In recent years, fatty liver has become more appreciated as a sign of obesity and resistance to insulin, a hormone that controls the body’s glucose levels. This new study ‒ ‘Interrelationship between Fatty Liver and Insulin Resistance in the Development of Type 2 Diabetes’ by Ki-Chul Sung and Sun H. Kim of Kangbuk Samsung Hospital, Sungkyunkwan University at Seoul, South Korea ‒ shows that fatty liver may be more than an indicator of obesity but may actually have an independent role in the development of type 2 diabetes.

There seems to be little awareness about the disease even among the physicians. “It is not as innocuous as it looks. It is known to develop into liver failure or liver cancer. Recent studies have shown that fatty liver also increased chances of diabetes,” says Dr Mishra, who is chairman of the Fortis-CDOC Centre for Excellence for Diabetes at New Delhi in India.

According to Kim, “Many patients and practitioners view fat in the liver as just ‘fat in the liver,’ but we believe that a diagnosis of fatty liver should raise an alarm for impending type 2 diabetes…Our study shows that fatty liver, as diagnosed by ultrasound, strongly predicts the development of type 2 diabetes regardless of insulin concentration.”

In the Seoul study, researchers examined 11,091 Koreans who had a medical evaluation including fasting insulin concentration and abdominal ultrasound at baseline and had a follow-up after five years.

Regardless of baseline insulin concentration, individuals with fatty liver had significantly more metabolic abnormalities including higher glucose and triglyceride concentration and lower high-density lipoprotein cholesterol (sometimes called “good cholesterol”) concentration.

Individuals with fatty liver also had a significantly increased risk for type 2 diabetes compare to those without fatty liver.

“Our study shows in a large population of relatively healthy individuals that identifying fatty liver by ultrasound predicts the development of type 2 diabetes in five years,” said Kim. “In addition, our findings reveal a complex relationship between baseline fatty liver and fasting insulin concentration.”

Also see my earlier report “Fatty Liver a Forerunner to Diabetes”

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