Ginger is one of several spices with antidiabetic properties.
Fresh ginger.
Studies on type 2 diabetics have shown that ginger powder can reduce blood sugar, HbA1c, insulin resistance, cholesterol, blood fats, and inflammation.74-77
The doses used were typically 1½ to 3 grams of ginger powder per day. This is equivalent to about 8 to 15 grams of fresh ginger.
Ginger can be a tasty addition to food. It can also be consumed as a supplement, typically in capsules.
Whether ginger tea would be helpful is uncertain; I haven’t seen any studies on that.