Health

Strong evidence suggests that food allergies are caused by a lack of exposure to food allergens—not by exposure to toxins

Researchers tracked thousands of Americans for decades, finding no links between ingesting recommended levels of fluoride and lower cognitive skills

Melatonin supplements have become a ubiquitous sleep aid, but research shows that benefits are modest, and the heart health effects of long-term use are unknown

As holiday feasts and stress approach, an expert explains how to keep your gut healthy without skipping the stuffing.

In recent weeks, dozens of infants in the U.S. have been infected with botulism in an outbreak linked to ByHeart powdered infant formula

Milliseconds of variability, now detected by fitness watches, can improve well-being

Deep emotional distress after birth kills many mothers. A new kind of drug offers better, faster treatment

Vaccines based on mRNA can be tailored to target a cancer patient’s unique tumor mutations. But crumbling support for cancer and mRNA vaccine research has endangered this promising therapy

In a successful transplant in a man with brain death, scientists prevented the immune system from attacking a genetically modified pig kidney for 61 days, the longest such an experiment has lasted

People with this autoimmune disease face much shorter life expectancies in lower-income nations.

Lone star tick bites are the most common cause of alpha-gal syndrome, which causes severe allergic reactions to red meat

From COVID shots to cancer therapy, mRNA is changing medicine.