Gut bacteria may hold the key to balancing estrogen and preventing cancer risks

New research has uncovered how gut bacteria and enzymes influence estrogen levels in the body. The findings, published in the Proceedings of the National Academy Of Sciences, reveal how these microbes recycle discarded estrogen. This process varies between populations, with industrial societies and formula-fed infants showing a higher capacity for it. The study highlights a direct link between gut health and hormone regulation. Disrupted microbial communities can cause excess estrogen, increasing the risk of breast and endometrial cancers. Researchers suggest that diet or probiotics may soon be used to manage hormonal balance and prevent disease.

Separate work shows how genetics shape more than just physical traits. Sociologist Dalton Conley’s new book, The Social Genome, argues that genes can predict education levels and future earnings. Meanwhile, climate change is expected to extend high pollen seasons by up to 19 days, worsening allergies.

A review of drug trials over the past 15 years found that 75 percent excluded pregnant women. This exclusion, meant to ensure safety, leaves gaps in understanding which medications are effective for them. The discoveries open new possibilities for health management through gut microbiome adjustments. Pregnant women remain underrepresented in medical research, limiting treatment options. Seasonal allergies are also set to increase as pollen seasons grow longer.