Uses:  Traditionally it was used as a medicinal plant and grown as a garden herb. Pliny called it Euphrosinum, due to its euphoric effect and it has long been associated with health and good cheer.  More recently it has been adopted as the symbol of National Cancer Day, as promoted by Cancer Research UK. It has been shown to contain gamma linoleic acid (GLA), an omega-6 polyunsaturated fatty acid, which is active against various cancers, including breast, brain and prostate. It prevents the spread of malignant tumours by restricting blood vessel growth.  It has the most potent concentration of GLA found in nature, containing twice as much as is found in the Evening Primrose, and which is used to treat pre-menstrual syndrome (PMS).  Capsules of borage seed oil may be bought from health food shops for this purpose.  The flowers can be used in salads and drinks and the leaves may be boiled as a vegetable.