Gut bacteria may raise cancer risks by altering estrogen levels

New research has uncovered how gut bacteria influence estrogen levels in the body. The findings, published in the Proceedings of the National Academy of Sciences, highlight a link between disrupted gut microbial communities and higher risks of breast and endometrial cancers. Scientists identified specific gut bacteria and enzymes that help regulate estrogen circulation. People in industrial societies and formula-fed babies show a greater ability to recycle discarded estrogen. This process, when disrupted, can lead to excess estrogen, which is tied to certain cancers.

Separately, sociologist Dalton Conley’s new book, The Social Genome, examines how genes shape lives beyond physical traits. His work suggests genetics can predict factors like education level and income.

In another development, a study noted that 75 percent of drug trials over the past 15 years excluded pregnant women. Including them could improve the understanding of drug safety and effectiveness during pregnancy.

Additionally, climate change may extend allergy seasons. Researchers warn of an extra 19 days of high pollen counts, leading to longer and more intense symptoms for sufferers. The research opens doors for new health strategies. Managing gut health through diet or probiotics could become a key method for hormonal regulation and disease prevention. Meanwhile, broader inclusion in clinical trials may address gaps in medical knowledge for pregnant women.