Raised levels of a protein in the blood may provide an early warning sign of the development of type 2 diabetes, research suggests.
Scientists believe testing for levels of the protein - RBP4 - may help identify those at risk of diabetes before symptoms become apparent.
Drugs to cut RBP4 levels may also help reduce the risk of full-blown disease.
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Raised RBP4 levels were found in people with a condition called insulin resistance, which develops when the body's tissues lose the ability to respond to the hormone insulin.
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The condition can lead not only to type 2 diabetes, but is also a major risk factor for cardiovascular disease.
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