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Amount of
fat surrounding abdominal organs, known as visceral fat, has
already been linked to insulin resistance, type 2 diabetes
and heart disease. Researchers have previously found serum
retinol binding protein (RBP), a transport protein that
carries vitamin A in the blood, has close relations with
waist circumference and intra-abdominal fat mass. Another
study suggests that, increased RBP4 means less insulin
sensitivity and increased chances of developing diabetes
mellitus type 2. Recently they have revealed that RBP4 is
preferentially produced in the deep fat than subcutaneous
fat. In fact, RBP4 gene activity in the visceral fat is 60
fold and subcutaneous fat 12 fold comparing with lean
persons. In response to gene activity blood levels of RBP4
may rise two to three times higher than lean patients.
Regardless of whether lean or obese, higher blood levels of
RBP4 means more visceral fat and more insulin resistance.
Unlike subcutaneous fat, visceral fat is situated deep into
the abdomen and evaluating the amount of visceral fat is not
very easy. By means of determining serum RBP4, not only
exact amount of deep belly fat can be measured, but also
diabetes and cardiovascular diseases and prediabetic states
can easily be predicted.
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