Furthermore, the risk of postmenopausal breast cancer dropped by 42 percent and 50 percent for endometrial cancer. The chances also decreased for colon cancer by 41 percent and 54 percent for pancreatic cancer.
Why is that?
Researchers believe it's because of the estrogen levels.
"Cancer risks for postmenopausal breast cancer and endometrial cancer are closely related to estrogen levels," lead author Daniel Schauer said in a statement. "Having weight loss surgery reduces estrogen level."
Researchers also noted other benefits from having the surgery.
"I think considering cancer risk is one small piece of the puzzle when considering bariatric surgery, but there are many factors to consider. Reductions in diabetes, hypertension and improvements in survival and quality of life are reason enough," lead author Daniel Schauer said in a statement.
"The study provides an additional reason
to consider bariatric surgery."