Eating whole grains like amaranth (also known as Rajgira) may help lower your blood pressure levels. Studies show that diets rich in whole grains may decrease your risk of high blood pressure. A review of studies found that a 30-gram per day increase in whole grains was associated with an 8% reduced risk of high blood pressure. Amaranth is a whole grain that’s particularly high in magnesium. Can prepare amaranth roti, ladoo, barfi.