High THC Levels May Affect Egg Quality and Fertility, New Study Finds

High levels of THC — the compound in marijuana that causes a “high” — may affect how eggs develop and could lead to fertility problems, miscarriages and chromosome issues in embryos, new research shows.

The findings were reported Sept. 9 in the journal Nature Communications.

Researchers analyzed more ...

COVID-19 Falls From Top 10 U.S. Causes of Death for First Time Since 2020

For the first time since the pandemic began, COVID-19 dropped out of the nation’s top 10 causes of death in 2024, new U.S. government data shows. 

Overall U.S. death rates also fell to their lowest level since 2020, according to the National Center for Health Statistics.

Heart disease and cancer remained the leading causes...

Endangered Shark Meat Found in U.S. Grocery Stores, Study Says

Shark meat sold in the U.S. may come from endangered species without consumers realizing it, a new study warns.

Researchers tested 29 shark products, including 19 fillets bought in grocery stores and seafood markets across North Carolina, Florida, Georgia and Washington, D.C., plus 10 jerky products purchased online. 

Using DNA ...

What to Know About Anaphylaxis: Symptoms, Triggers & Treatment

When people hear about anaphylaxis, they often associate the severe allergic reaction with food allergies. And while food allergies can cause anaphylaxis, allergies to insect stings, medications and latex can also trigger the response.

Anaphylaxis is rare. In most cases, people with allergies develop mild to moderate symptoms, such as wate...

Parent-Focused Prevention Programs For Childhood Obesity A Bust, Evidence Says

Programs that recruit parents to help fight early childhood obesity aren’t doing much good at all, a new evidence review says.

There’s no evidence that these programs have any impact on the body mass index (BMI) of toddlers, researchers reported in The Lancet. BMI is an estimate of body fat based on height and weight.<...

Air Pollution Might Accelerate Alzheimer's Progression

Air pollution might speed up the devastating effects of Alzheimer’s disease on the brain, a new study says.

Alzheimer’s patients exposed to higher levels of particle pollution appeared to suffer an increased buildup of toxic amyloid and tau proteins in their brains, researchers reported Sept. 8 in JAMA Neurology.