The effects of oil of evening primrose oil on fibroadenomas was assessed ov
er a 6-month period. Eleven out of 21 (52%) of fibroadenomas receiving even
ing primrose oil and 8 out of 19 (42%) controls reduced in size. This study
demonstrates that evening primrose oil does not significantly effect the n
atural history of breast fibroadenomas. (C) 2000 Harcourt Publishers Ltd.