title: Cinnamon improves glucose and lipids of people with type 2 diabetes. Effects of short-term cinnamon ingestion on in vivo glucose tolerance. Cinnamon extract lowers glucose, insulin and cholesterol in people with elevated serum glucose Cinnamon extract improves fasting blood glucose and glycosylated hemoglobin level in Chinese patients with type 2 diabetes. Glycated haemoglobin and blood pressure-lowering effect of cinnamon in multi-ethnic Type 2 diabetic patients in the UK: a randomized, placebo-controlled, double-blind clinical trial. Effect of cinnamon supplementation on glucose, lipids levels, glomerular filtration rate, and blood pressure of subjects with type 2 diabetes mellitus
abstract: OBJECTIVE The objective of this study was to determine whether cinnamon improves blood glucose , triglyceride , total cholesterol , HDL cholesterol , and LDL cholesterol levels in people with type 2 diabetes . RESEARCH DESIGN AND METHODS A total of 60 people with type 2 diabetes , 30 men and 30 women aged 52.2 + /- 6.32 years , were divided r and omly into six groups . Groups 1 , 2 , and 3 consumed 1 , 3 , or 6 g of cinnamon daily , respectively , and groups 4 , 5 , and 6 were given placebo capsules corresponding to the number of capsules consumed for the three levels of cinnamon . The cinnamon was consumed for 40 days followed by a 20-day washout period . RESULTS After 40 days , all three levels of cinnamon reduced the mean fasting serum glucose ( 18 - 29 % ) , triglyceride ( 23 - 30 % ) , LDL cholesterol ( 7 - 27 % ) , and total cholesterol ( 12 - 26 % ) levels ; no significant changes were noted in the placebo groups . Changes in HDL cholesterol were not significant . CONCLUSIONS The results of this study demonstrate that intake of 1 , 3 , or 6 g of cinnamon per day reduces serum glucose , triglyceride , LDL cholesterol , and total cholesterol in people with type 2 diabetes and suggest that the inclusion of cinnamon in the diet of people with type 2 diabetes will reduce risk factors associated with diabetes and cardiovascular diseases AIMS Various spices display insulin-potentiating activity in vitro , and in particular , cinnamon spice and its phenolic extracts have been shown to exhibit these capabilities . In vivo study shows that cinnamon may have beneficial effects on glucose homeostasis ; therefore the aim of this study was to further investigate this phenomenon in humans . METHODS Seven lean healthy male volunteers , aged 26 + /- 1 years , body mass index 24.5 + /- 0.3 kg/m(2 ) ( mean + /- s.e.m . ) , underwent three oral glucose tolerance tests ( OGTT ) supplemented with either a 5 g placebo ( OGTT(control ) ) , 5 g of cinnamon ( OGTT(cin ) ) , or 5 g of cinnamon taken 12 h before ( OGTT(cin12hpre ) ) in a r and omized-crossover design . RESULTS Cinnamon ingestion reduced total plasma glucose responses ( AUC ) to oral glucose ingestion [ -13 % and -10 % for OGTT(cin ) ( p < 0.05 ) and OGTT(cin12hpre ) ( p < 0.05 ) , respectively ] , as well as improving insulin sensitivity as assessed by insulin sensitivity index measures based on Matsuda 's model in both OGTT(cin ) ( p < 0.05 ) and OGTT(cin12hpre ) ( p < 0.05 ) trials compared with OGTT(control ) . CONCLUSIONS These data illustrate that cinnamon spice supplementation may be important to in vivo glycaemic control and insulin sensitivity in humans , and not only are its effects immediate , they also appear to be sustained for 12 Cinnamon ( 肉桂 ròu guì ) has in vitro insulin potentiating activity , and proanthocyanidins from cinnamon prevent in vitro formation of advanced glycation end products . Some human studies were equivocal , but several have shown beneficial effects of cinnamon supplementation on circulating glucose , lipids , and /or insulin . This placebo-controlled double-blind trial tested the effects of a dried water extract of cinnamon ( Cinnamomum cassia ) on circulating glucose , lipids , insulin , and insulin resistance . Men and women from Beijing and Dalian , China , were invited to participate if they had fasting serum glucose > 6.1 mmol/L or 2-h glucose > 7.8 mmol/L. Participants , ( 173 were enrolled and 137 completed the study ) were r and omly assigned to receive either a spray-dried , water extract of cinnamon ( CinSulin ® ) , 250 mg/capsule , or a placebo , twice a day for two months . Mean ± SEM age of participants was 61.3 ± 0.8 years , BMI was 25.3 ± 0.3 and M/F ratio was 65/72 .  After 2 mo , fasting glucose decreased ( p < 0.001 ) in the cinnamon extract-supplemented group ( 8.85 ± 0.36 to 8.19 ± 0.29 mmol/L ) compared with the placebo group ( 8.57 ± 0.32 to 8.44 ± 0.34 mmol/L , p = 0.45 ) . Glucose 2 h after a 75 g carbohydrate load , fasting insulin , and HOMA-IR also decreased with cinnamon extract compared with  placebo . Total and LDL-cholesterol decreased with cinnamon extract and HDL-cholesterol decreased in both the cinnamon-extract and placebo groups . In conclusion , supplementation with 500 mg of water-extract of cinnamon for two months reduced fasting insulin , glucose , total cholesterol , and LDL cholesterol and enhanced insulin sensitivity of subjects with elevated blood glucose For thous and s of years , cinnamon has been used as a traditional treatment in China . However , there are no studies to date that investigate whether cinnamon supplements are able to aid in the treatment of type 2 diabetes in Chinese subjects . We hypothesized cinnamon should be effective in improving blood glucose control in Chinese patients with type 2 diabetes . To address this hypothesis , we performed a r and omized , double-blinded clinical study to analyze the effect of cinnamon extract on glycosylated hemoglobin A(1c ) and fasting blood glucose levels in Chinese patients with type 2 diabetes . A total of 66 patients with type 2 diabetes were recruited and r and omly divided into 3 groups : placebo and low-dose and high-dose supplementation with cinnamon extract at 120 and 360 mg/d , respectively . Patients in all 3 groups took gliclazide during the entire 3 months of the study . Both hemoglobin A(1c ) and fasting blood glucose levels were significantly reduced in patients in the low- and high-dose groups , whereas they were not changed in the placebo group . The blood triglyceride levels were also significantly reduced in the low-dose group . The blood levels of total cholesterol , high-density lipoprotein cholesterol , low-density lipoprotein cholesterol , and liver transaminase remained unchanged in the 3 groups . In conclusion , our study indicates that cinnamon supplementation is able to significantly improve blood glucose control in Chinese patients with type 2 diabetes AIMS To determine the blood glucose lowering effect of cinnamon on HbA1c , blood pressure and lipid profiles in people with type 2 diabetes . METHODS 58 type 2 diabetic patients ( 25 males and 33 females ) , aged 54.9 ± 9.8 , treated only with hypoglycemic agents and with an HbA1c more than 7 % were r and omly assigned to receive either 2 g of cinnamon or placebo daily for 12 weeks . RESULTS After intervention , the mean HbA1c was significantly decreased ( P<0.005 ) in the cinnamon group ( 8.22 % to 7.86 % ) compared with placebo group ( 8.55 % to 8.68 % ) . Mean systolic and diastolic blood pressures ( SBP and DBP ) were also significantly reduced ( P<0.001 ) after 12 weeks in the cinnamon group ( SBP : 132.6 to 129.2 mmHg and DBP : 85.2 to 80.2 mmHg ) compared with the placebo group ( SBP : 134.5 to 134.9 mmHg and DBP : 86.8 to 86.1 mmHg ) . A significant reduction in fasting plasma glucose ( FPG ) , waist circumference and body mass index ( BMI ) was observed at week 12 compared to baseline in the cinnamon group , however , the changes were not significant when compared to placebo group . There were no significant differences in serum lipid profiles of total cholesterol , triglycerides , HDL and LDL cholesterols neither between nor within the groups . CONCLUSIONS Intake of 2 g of cinnamon for 12 weeks significantly reduces the HbA1c , SBP and DBP among poorly controlled type 2 diabetes patients  . Cinnamon supplementation could be considered as an additional dietary supplement option to regulate blood glucose and blood pressure levels along with conventional medications to treat type 2 diabetes mellitus A r and omized , double-blind , placebo-controlled trial was performed to investigate the effect of cinnamon supplementation on glucose , triglyceride ( TG ) , and high density lipoprotein-cholesterol ( HDL-C ) levels , TG/HDL-C ratio , blood pressure ( BP ) , and estimated glomerular filtration rate ( eGFR ) for ninety-nine type 2 diabetes mellitus ( T2DM ) patients . Forty nine ( 49 ) patients with T2DM were in the cinnamon group whereas 50 were in the placebo group . All participants received either a cinnamon or placebo capsule daily for the 60-day study period . At the end of the study , median glucose , TG , TG/HDL-C ratio , and BP were significantly decreased ( p < 0.005 ) whereas HDL-C and eGFR levels were significantly increased ( p < 0.005 ) in the cinnamon supplementation group . Interestingly , the study also revealed reduction of HbA1c levels after the 60-day study period . In the placebo  group , glucose , TG levels tended to increase and HDL-C levels tended to decrease whereas systolic and diastolic BP , HbA1c , and BUN CT were significantly increased and eGFR was significantly reduced ( p < 0.005 ) . Cinnamon supplementation  reduced plasma glucose , HbA1c , triglyceride , TG/HDL-C ratio , and BP and increased HDL-C levels and eGFR in subjects with T2DM . Cinnamon supplementation may be beneficial for those with T2DM to prevent and control diabetic complications
target: No statistically significant association was found between blood HDL-C changes and duration of supplementation .
  CONCLUSION Cinnamon supplementation significantly reduced blood triglycerides and total cholesterol concentrations without any significant effect on LDL-C and
background: BACKGROUND Cinnamon is a rich botanical source of polyphenols , whose positive effects on blood lipid concentrations have been hypothesized , but have not been conclusively studied .
  OBJECTIVE The objective of the study was to systematic ally review and evaluate the effect of administration of cinnamon on blood lipid concentrations .