In the Vedic culture ghee was traditionally made on the full moon because this is an expansive time during the lunar cycle when the essence of plants and animals are drawn upwards. It is said the moon is considered to rule or control soma; the juice or essence of plants, and of life itself. In the Vedas, milk is said to be the essence of grass, and ghee is said to be the essence of milk. The full moon on Guru Poornima above all, is considered miraculous as it affects our brain in a significant positive way.