Testosterone in the Womb Affects How Our Faces Look After Puberty

Hormone surges at puberty trigger a lot of physical changes in both men and women, morphing child-bodies into adult forms. Genitals, hips, and muscle mass change, obviously–but so do faces. A new study suggests those facial changes are primed to happen by the presence of testosterone in utero. »9/29/15 7:30pm9/29/15 7:30pm

A modern over-the-counter pregnancy test is a tiny engineering marvel, combining a sensitive antibod

A modern over-the-counter pregnancy test is a tiny engineering marvel, combining a sensitive antibody-based detection system with enzyme-activated dyes to pick up minute amounts of hormone from the developing placenta. Check out the new video that describes how it works at Ted-Ed! »7/13/15 7:36pm7/13/15 7:36pm

Yes, Oxytocin Makes You More Trusting and Generous. So Does Booze.

“The Moral Molecule.” “The Cuddle Hormone.” If you’ve been paying attention the past few years, you’ve heard about many of the near-magical effects of the hormone oxytocin on the brain. It makes people more altruistic. It reduces anxiety and increases trust. But it’s not the only chemical that affects the brain that… »5/21/15 12:03am5/21/15 12:03am

What Men Really Need To Know About  Testosterone Replacement Therapy

One of the fastest growing areas in pharmacology today is testosterone supplementation in men. But while low-T is a genuine problem for some men, it's not as prevalent as you may think – and the treatment is not without its risks. Here's what men need to know about testosterone replacement therapy, and why it should… »2/25/15 3:00pm2/25/15 3:00pm

Nope. Oxytocin isn't going to become the "trust me" drug.

Oxytocin is often referred to as the "trust hormone," a claim that was reinforced by a 2005 study in which participants became more trusting after it was administered via a nasal spray. Trouble is, few studies have been able to reproduce this result, prompting at least one neuroscientist to suggest it's high-time we… »12/18/13 11:40am12/18/13 11:40am

The Biologist Behind One of the Strangest Feuds in Scientific History

Atrazine is an herbicide marketed by agribusiness company Syngenta. It has been shown to "chemically castrate" frogs, turning males into females that are capable of rearing offspring; it is associated with birth defects, low birth weights, and menstrual problems in humans; and its use has been outright banned by the… »2/06/12 4:36pm2/06/12 4:36pm

Birth control pills linked to increased rate of prostate cancer

New research links contraceptive pills to an increased rate of prostate cancer. Don't worry: you haven't been taking it wrong all these years. There's a body of research that links prostate cancer to increased exposure to estrogen, and it's possible that widespread use of the Pill could cause an uptick of the hormone… »11/18/11 10:20am11/18/11 10:20am

Fast Food Joints Add Hormone to Food That Makes You Want to Eat More

When you ingest a stomach hormone called ghrelin it causes your brain to respond to food the way junkies respond to drugs. You are filled with an intense desire for it, and eating it becomes far more memorable. Researchers at Montreal's McGill University studied people's reactions to food after they had ingested… »5/07/08 1:52pm5/07/08 1:52pm