A daily aspirin might aid the heart, but it offers little help in reducing the risk of breast cancer in premenopausal women, according to research data from the Nurses’ Health Study, published in the Archives of Internal Medicine. Use of other non-steroid anti-inflammatory drugs, or NSAIDs, also had no effect.
This is true regardless of dose, duration of use, and hormone-receptor status.
Earlier studies in mice had shown a preventive effect on breast cancer, but that so far has no translated to humans.