Giorgia Guglielmi

Giorgia Guglielmi is a freelance science writer based in Basel, Switzerland. Specializing in life sciences, medicine, and the relationship between science and society, she has published numerous articles in outlets including Nature, Science, and Scientific American. She holds a PhD in biology from the European Molecular Biology Laboratory and a Master’s in Science Writing from the Massachusetts Institute of Technology. She has received recognition for her work, including the John Kendrew Award in 2020 and an ERC-funded FRONTIERS Media Fellowship in 2025. She has also led lectures and workshops on science communication at institutions such as Harvard University and the University of Zurich.

Some oral microbes may influence esophageal cancer risk

Certain harmful microbes in the mouth appear to promote cancer development, while others might help protect against it. 

Short-term steroid use may affect metabolism and immunity by reshaping gut bacteria 

Researchers set up a clinical trial to study how glucocorticoids affected the gut microbiota, metabolism, and immunity in healthy young men.

Gut microbes protect the liver by digesting fatty liver-causing sugar, fish study shows

Gut bacteria help protect the liver by breaking down sorbitol, a sugar made from glucose in the gut.

Largest oral microbiota catalog reveals bacteria linked to oral and systemic health 

The researchers created a microbial catalog, which they called HROM (human reference oral microbiome), containing 72,641 high-quality genomes from 3,426 species.

Microbial metabolites may help immune cells fight melanoma 

Diet and gut microbes can shape immune cell function and improve responses to anti-cancer therapy.

Some gut bacteria may reduce steroid hormone activity

A gut bacterium, Clostridium steroidoreducens, can chemically modify steroid hormones, including those used to treat IBD. 

Specific gut bacteria regulate intestinal motility by producing serotonin

L. mucosae and L. ruminis can produce serotonin in the gut, where it promotes nerve growth and regulates intestinal motility.

Distinct gut microbes and metabolites underlie differences in irritable bowel syndrome 

Researchers have found that certain gut bacteria and their metabolites differ between IBS subtypes.

Gut bacteria may help predict lung cancer treatment success

Changes in gut bacteria, especially Akkermansia, could predict treatment success in people with lung cancer.

Indigenous partnership reveals unique gut microbes and ethical research model

Ethical, long-term partnerships can uncover valuable scientific insights while respecting Indigenous knowledge.

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