Astra Essence by Health Concerns maintain vitality and promotes longevity. The formula is a combination of tonic herbs to nourish essence and astringent herbs to prevent loss of essence. Emphasis is placed on balanced kidney tonification. Essence tonics are taken in order to slow aging and to prevent deterioration of body functions for those who are under constant stress. The formula is useful in our society where many show signs of premature aging or kidney deficiency from fast-paced lifestyles.