13/07/2025
Heart disease, weight gain linked to higher breast cancer risk after menopause
Written by Erika Watts on July 11, 2025 — Fact checked by Jill Seladi-Schulman, Ph.D.
Weight gain and heart disease may affect breast cancer risk after menopause. Image credit: Vera Lair/Getty Images.
Researchers from the International Agency for Research on Cancer recently examined the link between excess weight and breast cancer risk in postmenopausal women.
The scientists focused specifically on women who developed cardiovascular disease to see how developing this affected breast cancer.
The findings showed an especially increased risk of breast cancer for every 5 kilograms per square meter increase in body mass index (BMI) in women who developed cardiovascular disease.
According to the Centers for Disease Control and Prevention (CDC)Trusted Source, nearly 74% of people living in the United States have body mass index (BMI) levels that indicate either overweight or obesity.
Carrying excess weight can cause many health issues, such as type 2 diabetes and an increased risk of heart disease. Being overweight can even lead to a higher risk of developing breast cancerTrusted Source.
A new study led by researchers from the International Agency for Research on Cancer of the World Health Organization (WHO) in Lyon, France set out to discover whether women who are overweight or have obesity who go on to develop heart disease or type 2 diabetes have an increased breast cancer risk.
While type 2 diabetes did not increase breast cancer risk, the study revealed that women who developed cardiovascular disease (CVD) had a 31% higher risk of breast cancer.
The study appears in the American Cancer Society’s journal CancerTrusted Source.