9 doctors weighed in:
Does natural progesterone prevent breast cancer?
9 doctors weighed in

Dr. Sanford Rosenberg
Obstetrics & Gynecology
4 doctors agree
In brief: No
There is no evidence Progesterone of any type prevents breast cancer, "natural" Progesterone or not.
If a woman has menses that only occur a few times a year, six or four or fewer, however, Progesterone or progesterone-like compounds can very definitely prevent endometrial hyperplasia (which can lead to uterine cancer), and should be used regularly to oppose continuous estrogen stimulation.

In brief: No
There is no evidence Progesterone of any type prevents breast cancer, "natural" Progesterone or not.
If a woman has menses that only occur a few times a year, six or four or fewer, however, Progesterone or progesterone-like compounds can very definitely prevent endometrial hyperplasia (which can lead to uterine cancer), and should be used regularly to oppose continuous estrogen stimulation.
Dr. Sanford Rosenberg
Dr. Sanford Rosenberg
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Dr. Devon Webster
Internal Medicine - Oncology
2 doctors agree
In brief: No
Progesterone has been implicated as the "bad guy" in combined hormone replacement therapy when it comes to breast cancer.
Women taking estrogen + progesterone, natural or not, were at higher risk of developing breast cancer. Also, their breast cancers tended to be more aggressive. Progesterone also seems to increase the aggressiveness of other cancers. Natural Progesterone is not any safer.

In brief: No
Progesterone has been implicated as the "bad guy" in combined hormone replacement therapy when it comes to breast cancer.
Women taking estrogen + progesterone, natural or not, were at higher risk of developing breast cancer. Also, their breast cancers tended to be more aggressive. Progesterone also seems to increase the aggressiveness of other cancers. Natural Progesterone is not any safer.
Dr. Devon Webster
Dr. Devon Webster
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Dr. Travis Kidner
Surgery - Oncology
1 doctor agrees
In brief: Unclear
The evidence is unclear on this topic.

In brief: Unclear
The evidence is unclear on this topic.
Dr. Travis Kidner
Dr. Travis Kidner
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