Numerous clinical studies have shown that type-II diabetics have higher systolic and diastolic viscosity than healthy non-diabetic people. 

Patients with metabolic syndrome have higher viscosity than those without, and viscosity scores can predict incident diabetes in initially non-diabetic adults. 

In a study of 128 obese patients (BMI > 28 kg/m2) and 90 non-obese healthy controls, diastolic blood viscosity was 15% higher in obese vs. non-obese patients. The report published in the International Journal of Obesity stated: “Blood viscosity is abnormal in obese patients with normal lipid parameters …the degree of obesity influences blood rheology.” 


Lowe GDO, Lowe JM, Drummond MM, et al. Blood Viscosity in Young Male Diabetics with and without Retinopathy. Diabetologia 1980; 18:359-363. 

Peduzzi M, Melli M, Fonda S, et al. Comparative evaluation of blood viscosity in diabetic retinopathy. Int Ophthalmol 1984; 7:15-19. 

Skovborg F, Nielsen AV, Schlichtkrull J, Dietzel J. Blood viscosity in diabetic patients, Lancet 1966; 15:129-131. 

Rillaerts E, van Gaal L, et al. Blood Viscosity in Human Obesity: Relation to Glucose Tolerance and Insulin Status. Int J Obes. 1989; 13:739-45.

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