Though Yoga cannot completely help to treat diabetes, it can be used as a complement to the changes in the lifestyle that are mandatory to keep diabetes under check. Yoga also helps the person to remain in good health and promote overall well-being. To avoid genetic diabetes, it is advisable to practice yoga from childhood.
By massaging the internal organs, especially the glandular systems the cause of diabetes, yogic asanas can support the treatment of diabetes.
Here are some of the Asanas which help to keep diabetes under check.
Surya Namaskara (Sun Salutation): Surya Namaskara is one of the best Yogic asanas a diabetic patient should practice 
on a regular basis. It’s because; Surya Namaskara increases the blood supply to almost all the parts of the body thereby enhancing the administration of insulin in the body.
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Sarvangasana: Known as shoulder stand in English, this asana is especially for the parathyroid and thyroid glands which are located in the neck. Sarvangasana involves chin-lock which in turn enthuse fresh blood to the glands. This supply of blood increases the functioning the glands which in turn control the metabolic activity thereby keeping a check on diabetes.
Paschimotasana: Known as forward seated bend, this Yogic Asana is useful for people suffering from diabetes as it helps in the stimulation of internal organs such as the pancreas, liver, and kidneys thereby keeping a check on diabetes.
Halasana: This asana is known as the plough pose in English. This is because; a person’s body resembles a plough while performing this asana. 
Regular practicing of Halasana, massages all the vital internal organs of the body and also ensures proper functioning of pancreas and spleen and also leads the pancreas to produce more insulin in the case of type 1 diabetes. Practice this asana after practicing Sarvangasana for better results.
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Ardha Matsyendrasana: This Asana involves the half spinal twist. It helps to rejuvenate and cleanse the 
body. It provides a deep massage to internal organs and throws out toxic substances from these organs. This asana, when practiced on a regular basis, can help to regulate the secretion of bile and adrenaline thereby helping in the management of diabetes at normal levels.
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These were some of the Yogic asanas which you can practice to keep a check on diabetes. However, some of these poses are unsuitable for pregnant women and hence should be avoided. People with ear problems, blood clots, and cardiovascular problems should also avoid practicing some of the yogic poses.