1. Meat: Consuming meat is crucial for diabetics due to its rich protein content. Fatty meats, on the other hand, contain high levels of saturated fats and cholesterol, making them unsuitable for diabetics. 

2. Durian: Known as the "king of fruits," durian is a tropical fruit with high nutritional value.

While it is a good source of nutrients and helps in replenishing energy, it is also high in calories and sugar. Diabetics should be cautious in consuming durian due to its high sugar content and calorie density. 

3. Custard Apple: It is also high in calories and sugar, making it unsuitable for diabetics.

Opt for fruits with lower sugar content to maintain stable blood sugar levels.