Hormone News and Research

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A hormone is a chemical released by one or more cells that affects cells in other parts of the organism. Only a small amount of hormone is required to alter cell metabolism. It is essentially a chemical messenger that transports a signal from one cell to another.

Stress hormones may silence crucial neuronal genes through specific RNA molecules

What if the brain's response to stress could be read not in fleeting neurotransmitter bursts, but in the quieting of genes deep inside chromatin? Researchers at the University of Alabama at Birmingham have now shown that stress hormones may silence crucial neuronal genes through an unexpected class of RNA molecules that operate not by encoding proteins, but by reshaping the genome's architecture.

4 Nov 2025

New study finds no increased risk of heart and brain infarctions for transgender women

Contrary to previous research, transgender women who use the hormone oestradiol for their transition do not have an increased risk of heart attack and stroke compared to men in the general Dutch population.

4 Nov 2025

How artificial light interferes with liver health

People who work against their internal clock over a long period of time increase the risk of fatty liver. The correlations are complex, but one research team in Bochum is trying to get to the bottom of the issue.

4 Nov 2025

Long-term use of melatonin supplements linked to higher risk of heart failure and death

Long-term use of melatonin supplements, often used to promote sleep and address insomnia, was associated with a higher risk of heart failure diagnosis, heart failure hospitalization and death from any cause in chronic insomnia, according to a preliminary study to be presented at the American Heart Association's Scientific Sessions 2025.

3 Nov 2025

Even low PFAS in drinking water raise blood levels, California study shows

Researchers in Southern California found that even low levels of PFAS (“forever chemicals”) in public drinking water lead to measurable increases in blood PFAS concentrations. The study underscores the urgent need for stronger water-quality monitoring and stricter PFAS regulations across non-industrial regions.

2 Nov 2025

Sensory effects of flavanols trigger physiological responses in the brain

Astringency is a dry, puckering, rough, or sandpapery sensation in the mouth caused by plant-derived polyphenols.

31 Oct 2025

Some hormonal contraceptives linked to higher risk of breast cancer

Some common hormonal contraceptives are linked to a slightly higher risk of breast cancer than others.

30 Oct 2025

Sharing happy moments with a partner may be good for older people's health

Sharing happy moments with a partner may be good for older people's health, lowering the level of the stress hormone cortisol in their bodies, according to research published by the American Psychological Association.

30 Oct 2025

Research identifies biomarkers in blood to fine-tune breast cancer interventions

Doctors may be able to spare patients unnecessarily aggressive breast cancer treatments by collecting and testing cancer cells in patients' blood, research from the University of Michigan and the University of Kansas suggests.

30 Oct 2025

WHO reviews highlight limited long-term data on GLP-1 drug safety

Three new Cochrane reviews find evidence that GLP-1 drugs result in clinically meaningful weight loss, but industry-funded studies raise questions. The reviews were commissioned by the World Health Organization (WHO) to inform upcoming guidelines on the use of these drugs to treat obesity.

30 Oct 2025

Aligning your body clock may protect your heart and metabolism, says AHA

A new American Heart Association scientific statement highlights how maintaining circadian health through regular sleep, light exposure, meal timing, and exercise may reduce cardiometabolic disease risk. Disrupting these daily rhythms can impair glucose regulation, blood pressure, and cardiovascular function.

29 Oct 2025

Scripps Research professor wins $3.2 million grant to unravel the mysteries of type 1 diabetes

Luc Teyton, professor in the Department of Immunology and Microbiology at Scripps Research, has received a five-year, $3.2 million grant from the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) to help answer how type 1 diabetes manifests and develop potential therapeutics to reverse or prevent the disease.

29 Oct 2025

Retaining gonad function could be a potent strategy to fight late-life frailty

Frailty threatens older individuals because it increases their vulnerability to detrimental health outcomes, such as falling, longer hospitalization, or even shortened life expectancy.

29 Oct 2025

Four distinct subgroups of PCOS open up for more tailored treatments

Four distinct subgroups of polycystic ovary syndrome (PCOS) have been identified in an international study published in Nature Medicine by researchers from Karolinska Institutet, among others.

29 Oct 2025

Hydroxytyrosol from olives shows new promise as a brain-protective compound

This review highlights hydroxytyrosol's role as a neuroprotective agent, activating key pathways for mental and vascular health through olive-derived compounds.

29 Oct 2025

AI-powered LifeClock forecasts diseases years before symptoms appear

Researchers have developed LifeClock, an AI-driven biological clock trained on over 24 million electronic health records to estimate biological age across the human lifespan. The model accurately predicts disease risk years in advance, revealing distinct developmental and aging processes.

28 Oct 2025

Uncovering mechanisms of neuronal migration in the adult brain

Researchers have discovered how newly created neurons depend on blood flow in the adult brain to travel from their site of origin to their final location.

28 Oct 2025

Circadian rhythm disruptions may increase the risk of cardiovascular disease

As modern lifestyles increasingly challenge the body's natural circadian rhythm, the American Heart Association is spotlighting the potential health consequences of regular disruptions to our body's internal clock with a new scientific statement published today in its flagship journal Circulation.

28 Oct 2025

New drug can have a promising effect in cancer patients with active brain metastases

An international clinical study led by the Medical University of Vienna shows that the drug patritumab deruxtecan (HER3-DXd) can have a promising effect in patients with active brain metastases of various tumor types.

28 Oct 2025

Air pollution, even below EPA guidelines, increases breast cancer risk

Women living in parts of the United States with lower air quality, especially neighborhoods with heavy emissions from motor vehicles, are more likely to develop breast cancer, according to a multiyear analysis involving more than 400,000 women and 28,000 breast cancer cases.

28 Oct 2025