Hair dye cleared of cancer charges

摘要

Using hair dyes does not cause cancer,according to an assessment of 79 hair dye studies conducted in 11 countries and published in the Journal of the American Medical Association.Scientists from around the world found there was no evidence that personal hair dye users were at increased risk of breast or bladder cancer,although they discovered a "borderline effect" for haematopoietic cancers,such as leukaemia.