Health

Peptide-based substances are largely unproven and risky, experts say, but they’re gaining popularity among influencers and athletes—and the U.S. secretary of health

Do declining immune systems explain the trend, or is something else going on? Experts explain

Creatine does help build muscle, but social media claims for methylene blue dye are way overblown

Immune system overreactions may be the true culprit of cardiac illness—and lifesaving drugs can calm them down

A man with HIV has gone into remission after receiving bone marrow from his brother, who has a rare mutation that prevents the function of receptors that HIV binds to

A burgeoning field is launching its first clinical trial to find out whether dialing back cell development can safely refresh aged tissues and organs

Oxygen and hyaluronic acid may play a role in tissue recovery and regeneration, two new studies suggest

A new Lyme disease vaccine made by Pfizer and Valneva could lower infection rates of the tick-borne illness, but federal approval and patient uptake could be a challenge

The weight you lose and the nausea you experience from GLP-1 drugs may be linked to common gene variants, but they can’t fully explain why some people lose more weight than others

A sharp rise in U.S. measles cases is linked to falling MMR vaccination rates and growing immunity gaps

The White House budget proposal would also curb federal payments for scientific publishing

Artemis II’s AVATAR experiment will see organs-on-a-chip travel to the moon and back, revealing how such a journey affects the body’s cells