Flaxseed Consumption on Biochemical and Quality of Life in Type 2 Diabetes

The main goal of this clinical trial is to determine the effect of flaxseed added to the diet on biochemical parameters and quality of life in patients with Type 2 diabetes mellitus (T2DM). The main questions it aims to answer are: * Does flaxseed supplementation given to T2DM patients for 12 weeks have an effect on biochemical parameters? * Does flaxseed supplementation given to T2DM patients for 12 weeks have an effect on quality of life? Researchers will compare patients with T2DM consume diet added flaxseed to a control group to see if flaxseed effect on biochemical parameters and quality of life. Participants will: * Complete the questionnaire, record the 3-day food consumption and be taken the anthropometric measurements at the beginning and end of the study. * Take diet added 30 g ground flaxseed (intervention group) or only diet (control group) every day for 12 weeks. * Visit the clinic once every 4 weeks for follow-up. * Report the dietary adherence and gastrointestinal symptoms on a phone call once every week.