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Breast Cancer Risk Factors: IGF-1 Hormone Levels

Insulin-like growth factor 1 (IGF-1) is a natural hormone that plays a role in growth and development.

Studies show women with higher levels of IGF-1 in their blood may have a higher risk of breast cancer than women with lower levels of IGF-1 [248-251].

Measures of blood levels of IGF-1 may one day help estimate breast cancer risk.

For a summary of research studies on IGF-1 hormone levels and breast cancer, visit the Breast Cancer Research Studies section.

Learn about other factors linked to the risk of breast cancer.

Updated 04/23/24