As the name suggests (tarbooj ke beej in Hindi), these are the seeds found in the watermelon fruit. They are low in calories and high in nutrients, and no, they are not poisonous though they may be hard to digest for some. And they do offer great benefits. Some of those include boosting heart health and immunity and keeping your blood sugar levels under control. The seeds are rich in numerous micronutrients like potassium, copper, selenium, and zinc – nutrients that you may not obtain from your diet in adequate quantities.