June 1995 in “International Journal of Gynecology & Obstetrics” Long-term use of oral contraceptives, especially starting before age 20, may increase the risk of early-onset breast cancer.
10 citations
,
May 2020 in “Journal of The American Academy of Dermatology” Taking spironolactone doesn't increase the chance of breast cancer coming back.
7 citations
,
March 2019 in “Cancer Epidemiology, Biomarkers & Prevention” Finasteride use is not clearly linked to an increased risk of male breast cancer.
4 citations
,
October 2018 in “International Braz J Urol” Taking 5-alpha reductase inhibitors does not increase the risk of breast cancer in men.
30 citations
,
November 2000 in “British Journal of Cancer” Reduced sexual drive may be linked to male breast cancer, while anti-estrogenic factors might lower the risk.
Chemotherapy for breast cancer often causes significant and lasting hair loss.
September 2025 in “Journal of the American Academy of Dermatology” Using 5α-reductase inhibitors for hair loss in women doesn't increase cancer risk.
April 2016 in “Journal of The American Academy of Dermatology” Spironolactone use is not linked to an increased risk of breast cancer, but caution is advised for high-risk patients.
2 citations
,
May 2020 in “Journal of the American Academy of Dermatology” Using certain hair products may increase breast cancer risk in black women.
2 citations
,
January 2017 in “Annals of Dermatology” Taking 5-alpha reductase inhibitors does not increase breast cancer risk in men.
28 citations
,
August 2014 in “Cancer Causes & Control” Taking 5α-reductase inhibitors does not significantly increase the risk of breast cancer in men.
July 2025 in “American Journal of Clinical Dermatology” Alopecia treatments like 5α-reductase inhibitors and spironolactone are safe for breast cancer patients and high-risk women.
24 citations
,
December 2019 in “PLoS ONE” The BHBS is a valid tool to study cultural norms and breast cancer risk in Black women.
32 citations
,
September 2013 in “Breast cancer research” A specific gene variant is linked to a higher risk of hair loss from chemotherapy in breast cancer patients.
15 citations
,
March 2018 in “Cancer Medicine” Alopecia areata patients have varied cancer risks, with some cancers being lower and others higher.
1 citations
,
January 2026 in “JAMA Network Open” Asian women with breast cancer experience the highest rates of long-term hair loss and related distress after chemotherapy.
June 2023 in “Journal of multidisciplinary sciences (Online)” PCOS is linked to a higher risk of endometrial cancer but not ovarian or breast cancer, and more research is needed on its role in cancer development and treatment effects.
February 2012 in “Community oncology” Finasteride for hair loss may increase the risk of certain cancers and has side effects; better regulation and education on its use are needed.
August 2024 in “Research Square (Research Square)” Using 5-alpha reductase inhibitors may lower the risk of breast cancer in females.
July 2020 in “Journal of the American Academy of Dermatology” Spironolactone does not increase the risk of breast cancer recurrence.
March 2007 in “Journal of Obstetrics and Gynaecology Canada” Birth control pills slightly increase the risk of breast cancer, especially if used before the first full-term pregnancy.
34 citations
,
November 2013 in “Breast Cancer Research and Treatment” Aromatase inhibitor therapy for breast cancer increases the risk of hair loss and thinning.
November 2025 in “npj Breast Cancer” Tamoxifen increases the risk of lasting hair loss after chemotherapy despite scalp cooling.
8 citations
,
December 2017 in “Cancer Medicine” Finasteride use may increase the risk of male breast cancer.
March 2026 in “International Journal of Pharmacology” Flaxseed lignans may reduce breast cancer risk in women.
32 citations
,
May 2013 in “The Journal of Urology” Using finasteride or dutasteride does not increase the risk of male breast cancer.
April 2023 in “International Journal of Women's Dermatology” Spironolactone is safe for breast cancer survivors with alopecia and does not increase cancer risk.
18 citations
,
March 2009 in “Medical Hypotheses” The document suggests that blocking sweat glands with antiperspirants might allow skin-generated hormones to be absorbed, possibly increasing breast and prostate cancer risk.
8 citations
,
February 2002 in “Journal of Medical Genetics” Skin changes can indicate a risk for breast cancer.
9 citations
,
October 2020 in “Journal of the American Academy of Dermatology” Patients with central centrifugal cicatricial alopecia may have a higher risk of breast and colorectal cancer.