A health organisation has petitioned for warning labels to be put on cheese amid concerns of breast cancer, but the science is mixed.
Members of the Physicians Committee for Responsible Medicine (PCRM) sent a petition to the US Food and Drug Administration (FDA) to caution consumers.
PCRM advocates strongly for plant-based diets and higher standards of animal welfare.
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It says hormones found in cow's milk cheese carry an increased risk of breast cancer.
PCRM cited research claiming high-fat cheese products are linked to a 53 percent increase in breast cancer.
This research said women who ate "the most American, cheddar and cream cheese" had a higher risk.
The conclusion of the research was "Intake of high-fat dairy, but not low-fat dairy, was related to a higher risk of mortality after breast cancer diagnosis."
But other research on the matter is mixed.
A 2017 analysis of available evidence showed cheese is linked to no additional risk of death from any kind of illness.