Indian gooseberries (also known as alma fruit) are sour, bitter, astringent, and quite fibrous berries, that seem to have antidiabetic properties.
Indian gooseberries may improve blood sugar control, according to research.
In a 12 week long study on type 2 diabetics, a supplement made from Indian gooseberries reduced inflammation, cholesterol and, most importantly, HbA1c.83
In another study, 1 to 3 grams per day of dried Indian gooseberries for 21 days significantly reduced fasting blood sugar in type 2 diabetics, as well as healthy individuals. Moreover, Indian gooseberries dramatically increased carbohydrate tolerance, and decreased blood fats such as cholesterol and triglycerides, while increasing the good HDL cholesterol.84
If animal studies are anything to go by, Indian gooseberry juice should be antidiabetic as well. In diabetic rats, the juice reduced blood sugar.85
In conclusion, it seems that various forms of Indian gooseberry products are antidiabetic. I would personally try to avoid those with added sugar.
Whether other species of gooseberries are antidiabetic is uncertain. They very well may be, especially if they resemble the sour, bitter and astringent taste of the Indian variety, but I haven’t looked into it at this time.