Celery seed powder are nutrient dense and particularly rich in calcium, manganese, and iron. Theyâ??re low in calories and provide relatively equal amounts of carbs, protein, and fat.Celery seed powder are rich in many essential nutrients for bone health like calcium, manganese, magnesium, and phosphorus.Celery seed powder are a great source of non-heme iron. Eating iron-rich food helps your body produce red blood cells and may prevent anemia.Celery seed powder are a great source of magnesium. Eating a magnesium-rich diet may help control blood sugar levels and reduce your risk of type 2 diabetes.