Peanuts and jaggery are generally very good, but please be careful and eat in moderation. If you have any history of allergies or are unsure about your sugar levels, it's always better to take a quick opinion from your doctor to be safe.
Oh I absolutely loved kadalai mittai during my second trimester! I felt so happy munching on them because they gave me instant energy and my mom said jaggery is great for iron. It was my favorite guilt-free snack!
Kadalai mittai is a great healthy snack because jaggery contains iron and peanuts provide good proteins and fats. However, it's still high in sugar, so if you are keeping an eye on gestational diabetes, consult your doctor or nutritionist on how much you can have.