The effects of Anethum graveolens (dill) powder supplementation on clinical and metabolic status in patients with type 2 diabetes

BACKGROUND: The objective of this study was to investigate the effects of Anethum graveolens (dill) powder supplementation on glycemic control, lipid profile, some antioxidants and inflammatory markers, and gastrointestinal symptoms in patients with type 2 diabetes. MATERIALS AND METHODS: In this study, 42 patients with type 2 diabetes were randomly allocated to intervention and control groups and received either 3 g/day dill powder or placebo (3 capsules/day, 1 g each). Fasting blood sugar, insulin, homeostatic model assessment of insulin resistance, lipid profile, high-sensitivity C-reactive protein, total antioxidant capacity, malondialdehyde and gastrointestinal symptoms were measured in all of the subjects at baseline and postintervention. RESULTS: The dill powder supplementation significantly decreased the mean serum levels of insulin, homeostatic model assessment of insulin resistance, low-density lipoprotein cholesterol, total cholesterol and malondialdehyde in the intervention group in comparison with the baseline measurements (P < 0.05). Furthermore, the mean serum levels of high-density lipoprotein and total antioxidant capacity were significantly increased in the intervention group in comparison with the baseline measurement (P < 0.05). Colonic motility disorder was the only gastrointestinal symptom whose frequency was significantly reduced by supplementation (P = 0.01). The mean changes in insulin, low-density lipoprotein cholesterol, total cholesterol and malondialdehyde were significantly lower in the intervention group than in the control group (P < 0.05). In addition, the mean changes in high-density lipoprotein were significantly higher in the intervention group than in the control group (P < 0.05). CONCLUSION: Dill powder supplementation can be effective in controlling the glycemic, lipid, stress oxidative and gastrointestinal symptoms in patients with type 2 diabetes. TRIAL REGISTRATION: Iran Clinical Trials Registry: IRCT20120704010181N12. Registered on 12 May 2018.