Broccoli and broccoli sprouts 
Sulforaphane is a type of isothiocyanate with hypoglycemic activity. 
This phytochemical is formed when broccoli is chopped or chewed through the reaction of a glucosinolate compound called glucoraphanin, which is concentrated in broccoli, with the enzyme myrosinase (5). 
Test-tube, animal and human studies have shown that sulforaphane-rich broccoli extract has potent antidiabetic effects that help improve insulin sensitivity and reduce blood sugar levels and markers of oxidative stress. (6, 7). Broccoli sprouts are a concentrated source of glucosinolates, such as glucoraphanin, which, when supplemented as a powder or extract, have been shown to promote insulin sensitivity and lower blood sugar levels in people with type 2 diabetes (8, 9). 
In addition, consumption of cruciferous vegetables is associated with a reduced risk of type 2 diabetes (10, 11). 
The best way to increase the availability of sulforaphane is to enjoy broccoli and broccoli sprouts raw or lightly steamed, or add a source of active myrosinase, such as mustard seed powder, to cooked broccoli (12).

Pumpkins and pumpkin seeds 
Pumpkin is brightly colored and rich in fiber and antioxidants. It is an excellent choice for blood sugar regulation. Pumpkin is a traditional antidiabetic drug in many countries such as Mexico and Iran (15). 
Pumpkin may regulate blood sugar levels and is rich in carbohydrates called polysaccharides that have been studied. Treatment with pumpkin extract and powder has significantly lower blood sugar levels in human and animal studies (16, 17, 18, 19). More research is needed to determine. Eating them roasted or steamed can improve blood sugar levels. 
Pumpkin Seeds are packed with healthy fats and proteins, making them great for controlling blood sugar levels. 
A 2018 study of 40 people found that eating 2 ounces (65 grams) of pumpkin seeds lowered postprandial blood sugar levels by up to 35% compared to controls (20 confident available sources).

Nuts and Nut Butter 
Studies show that eating nuts can effectively regulate blood sugar levels. 
A study of 25 people with type 2 diabetes showed that eating both peanuts and almonds throughout the day as part of a low-carbohydrate diet lowered both fasting and postprandial blood sugar levels (twenty-one). 
In addition, one review found that a diet high in tree nuts with an average daily intake of 2 ounces (56 grams) increased hemoglobin A1c (HbA1c), a marker of fasting blood glucose and long-term glycemic control, compared with the control diet. type 2 diabetic (22)