Since women can experience either psychological or physiological symptoms, or both types, O?na Health has developed two different formulations that may be taken separately or together. O?na PMS1 is taken throughout a woman's cycle and works with her body to help balance production of certain hormones; the correct balance can mitigate the onset of PMS*Bloating ? Anxiety ? Mood swings ? Forgetfulness Mild depression ? Irritability ? Breast tendernessStaying within our philosophy of keeping formulations simple, O?na PMS1 contains two tablets - a daily tablet and an additional 'bonus supplement'. Each daily tablet consists of a very fine chaste tree berry extract that is standardized to its key active compound. It is also formulated for younger women who may not remember to take their herbs throughout the day - so one tablet contains a mighty 275 mg. of chaste tree berry-- all that should be required.* (check with your health care professional) Most products on the shelf contain only 60 mg. or less of a lesser quality extract. Since many women forget throughout the day to take the tablet or tincture, this often means they do not get enough chaste tree in their system and later wonder why it didn't work. (for all ingredients go to Ingredient Info O?na PMS1)The daily tablet also contains black cohosh. Neither black cohosh or chaste tree berry contain hormones or hormone-like substances; however the herbs do influence hormonal activity through the pituitary gland and hypothalamus.* (for a full explanation go to How do they work? and O?na PMS1).