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Co-administration of viscous fiber, Salba-chia and ginseng on glycemic management in type 2 diabetes: a double-blind randomized controlled trial

Purpose Viscous dietary fiber, functional seeds and ginseng roots have individually been proposed for the management of diabetes. We explored whether their co-administration would improve glycemic control in type 2 diabetes beyond conventional therapy. Methods In a randomized, double-blind, controlled trial conducted at two academic centers (Toronto, Canada and Zagreb, Croatia), individuals with type 2 diabetes were assigned to either an active intervention (10 g viscous fiber, 60 g white chia seeds, 1.5 g American and 0.75 g Korean red ginseng extracts), or energy and fiber-matched control (53 g oat bran, 25 g inulin, 25 g maltodextrose and 2.25 g wheat bran) intervention for 24 weeks, while on conventional standard of care. The prespecified primary endpoint was end difference at week 24 in HbA1c, following an intent-to-treat analysis adjusted for center and baseline. Results Between January 2016 and April 2018, 104 participants (60M:44F ; mean +/- SEM age 59 +/- 0.8 years ; BMI 29.0 +/- 0.4 kg/m(2) ; HbA1c 7.0 +/- 0.6%) managed with antihyperglycemic agent(s) (n = 98) or lifestyle (n = 6), were randomized (n = 52 test ; n = 52 control). At week 24, HbA1c levels were 0.27 +/- 0.1% lower on test compared to control (p = 0.03). There was a tendency towards an interaction by baseline HbA1c (p = 0.07), in which a greater reduction was seen in participants with baseline HbA1c > 7% vs <= 7% (- 0.56 +/- 0.2% vs 0.03 +/- 0.2%). Diet and body weight remained unchanged. The interventions were well tolerated with no related adverse events and with high retention rate of 84%. Conclusions Co-administration of selected dietary and herbal therapies was well- tolerated and may provide greater glycemic control as add-on therapy in type 2 diabetes

ginseng ; viscous fiber ; Salba-chia ; glycemic management ; type 2 diabetes

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