What you need to know about fentanyl.

Low-calorie sugar alternatives, which had previously been thought to be relatively harmless, may actually have a negative effect on human gut health, according to a new study.

Dora Chhith's daughter Sadaya Paige was born with septo-optic dysplasia, which caused complete blindness in both her eyes.

Travis Snyder is in a fight for his life as he races to find a bone marrow donor in his seven-year battle with acute myeloid leukemia, a type of cancer that worsens quickly if not treated, according to the National Cancer Institute.

A California woman who says she was diagnosed with stage 4 breast cancer at age 29 is sharing her story to help other women advocate for themselves when it comes to their health.

A dad mourning the loss of his 26-year-old daughter is sharing an emotional message on mental health.

Knowing what to put on a baby’s plate and when can be daunting and nerve-racking for new parents. Now experts recommend regularly offering non-choking forms of foods containing common allergens between 4 and 6 months of age.

Jenna Goldman said she was out on a run with her now-husband two years ago when she started feeling like she was getting a migraine.

Olympian Lolo Jones is speaking out about taking control of her fertility journey, a story she wishes someone had told her when she was younger.

There’s no doubt that teen mental health can ebb and flow.

ABC News chief medical correspondent Dr. Jen Ashton breaks down how the variant-specific vaccines are designed to offer greater protection.

One of Atlanta’s largest hospitals says it plans to shut down in two months after experiencing more than $100 million in losses over the past year.

A former owner and CEO of a South Florida drug manufacturing company has been sentenced to three years and one month in federal prison for lying to the U.S. Food and Drug Administration and allowing contaminated medicine to go to pediatric hospitals.

ABC News Senior Policy Reporter Anne Flaherty shares the stories of people who are suffering with long COVID.

The U.S. Food and Drug Administration has posted another negative review of a closely watched drug for the deadly neurodegenerative disease ALS.

A Silicon Valley executive who prosecutors said lied to investors about inventing technology that tested for allergies and COVID-19 using only a few drops of blood was found guilty of health care fraud.

RT @AMitrops: .@CDCDirector Dr. Rochelle Walensky became the latest American to get the new bivalent COVID-19 booster on Thursday, telling…

Arrhythmia alerts can be nerve-wracking, but they're not usually an emergency.

Kansas' Democratic governor wasted little time after a decisive state vote in favor of abortion rights.

Planned Parenthood Arizona has joined several other providers and restarted abortion care in the state, although it may only be temporary.