hormones

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Doctors: Don't Freak Out About Your Cortisol Quite Yet

Wellness influencers paint stress hormone as a villain, but experts say not so fast

(Newser) - The stress hormone cortisol is currently the talk of the internet. Wellness influencers warn about the various symptoms of chronically high cortisol—for example, waking up at 3am, swollen "cortisol face," and accumulating belly fat. Many offer diet and exercise routines that they claim will help. But do...

Champion Runner Caster Semenya Gives Up Her Fight

She abandons her 7-year legal fight against sex eligibility rules in track and field

(Newser) - Olympic champion runner Caster Semenya is ending a seven-year legal challenge against sex eligibility rules in track and field, her lawyers said Thursday, despite winning a ruling at the European Court of Human Rights in July. Patrick Bracher, a lawyer for Semenya, said in an email to the AP that...

Ultraprocessed Foods May Harm Male Hormones, Boost Body Fat
Ultraprocessed Food
Shows a 'Big Shocker' for Men
NEW STUDY
Aug 29, 2025 4:14 PM CDT

Ultraprocessed Food Shows a 'Big Shocker' for Men

Study links packaged foods to weight gain, hormone disruption for men

(Newser) - A new study suggests that diets high in ultraprocessed foods may negatively affect not just overall metabolic health, but also male reproductive health. In their research published Thursday in the journal Cell Metabolism , scientists from the University of Copenhagen enrolled 43 healthy men, ages 20 to 35, and assigned...

Common Chemical May Trigger Early Puberty
Common Chemical May
Trigger Early Puberty
NEW STUDY
Sep 15, 2024 8:00 AM CDT

Common Chemical May Trigger Early Puberty

Researchers suggest the fragrance musk ambrette prompts hormonal changes

(Newser) - For the first time, research has potentially linked early onset puberty to a common chemical found in home and beauty products. Experts have been raising the flag about precocious puberty for a while now as they've witnessed the average age that children start puberty continue to dip earlier and...

Olivia Munn Has Full Hysterectomy to Fight Cancer

Actor reveals the latest on her health journey in new interview

(Newser) - As part of her breast cancer battle , Olivia Munn and her doctors intentionally put her body into menopause, the actor reveals in a new interview with Vogue . Because the type of breast cancer she was diagnosed with last year grows by feeding on estrogen, Munn (who underwent a double mastectomy)...

Amy Schumer Reveals Diagnosis, Says She's 'Reborn'

Comedian, the subject of internet speculation over her changed appearance, has Cushing syndrome

(Newser) - Earlier this month, Amy Schumer acknowledged there were "some medical and hormonal things going on in my world right now" after fans commented on her appearance—especially her "puffier" face—during a recent media tour to promote the new season of her Hulu show Life & Beth. Now,...

We Now Know What Causes Morning Sickness
We Now Know What
Causes Morning Sickness
in case you missed it
Dec 17, 2023 7:15 AM CST

We Now Know What Causes Morning Sickness

Scientists point to hormone GDF15, a discovery that raises hopes for a possible cure

(Newser) - Pregnant women may soon no longer have to dread that gestational malady known as morning sickness, a condition marked by nausea and throwing up, usually at its worst in the first trimester. In new research published Wednesday in the journal Nature , scientists say they're now focusing on one particular...

For Trans Advocates, Victory in This State

Federal judge strikes down ban on gender-affirming care for transgender minors in Indiana

(Newser) - A federal judge issued an order Friday stopping an Indiana ban on puberty blockers and hormones for transgender minors from taking effect as scheduled July 1. The American Civil Liberties Union of Indiana sought the temporary injunction in its legal challenge of the Republican-backed law, which was enacted this spring...

Stomach Rebelling Over Stress? 'Love' Hormone May Help

Scientists find that oxytocin plays bigger role in stress reduction, digestion than previously thought

(Newser) - When you're cuddling with someone special, you may feel butterflies in your stomach—but scientists now say the feel-good hormone that's released when you're in love may also be playing another part when it comes to your GI tract. Researchers have long known that when people are...

New Risk Factor for COVID-19: Baldness?
New Risk
Factor for
COVID-19:
Baldness?
new study
Jun 5, 2020 1:28 PM CDT

New Risk Factor for COVID-19: Baldness?

Researcher says baldness is 'perfect predictor of severity'

(Newser) - Research already has suggested that men face a greater risk of severe illness and death from COVID-19. Now, scientists say male pattern baldness might actually be a risk factor, reports the Telegraph . "We really think that baldness is a perfect predictor of severity," says Brown University's Carlos...

Track Star May Have to Lower Testosterone Levels

New IAAF rules could affect whether South Africa's Caster Semenya can compete

(Newser) - If Caster Semenya wants to compete in certain women's Olympic and world championship events, the South African track star will have to start undergoing hormone replacement therapy or otherwise find a way to lower her hormone levels, per new rules from the International Association of Athletics Federations. CNN reports...

For Those With Psychological Sex Problems, Potential Relief

Kisspeptin is now being explored as a way to help couples struggling to conceive

(Newser) - Kisspeptin, a naturally occurring hormone that kicks off puberty and is thought to fuel what the Telegraph describes as the "voracious sexual appetites of young people," could well be a sort of "mental Viagra" for people with psychosexual disorders—that is, disorders that are psychological as opposed...

Scientists Find Hormone That Reduces Sugar Cravings

This could be good news for people with obesity or diabetes

(Newser) - The days of uncontrollably binging on leftover Christmas goodies may be numbered. The Telegraph reports researchers have figured out a hormone produced in the liver that reduces the desire to eat sugar. Fibroblast growth factor 21—or FGF21—is produced when carbohydrate levels in the body get too high and...

'Man Boob' Surgery Surges
 'Man Boob' Surgery Surges 
Nov 28, 2012 9:55 AM CST

'Man Boob' Surgery Surges

Number of British men seeking the procedure doubles in 5 years

(Newser) - Dude looks like a lady no more. More men are seeking breast reduction surgery to treat gynecomastia, which causes the dreaded "man boobs," reports the BBC . Statistics from the British Association of Aesthetic Plastic Surgeons show that 790 men in the UK underwent the procedure last year, double...

Look Out, Viagra: Testosterone Drugs Gain Popularity

But doctors worry they'll be dangerously overused

(Newser) - New drugs designed in part to save the sex lives of aging men could become the biggest thing since Viagra, reports Bloomberg . The problem is that the testosterone boosters from Eli Lilly and Abbott are becoming so popular that doctors worry men who don't need them for strictly medical...

Hormone Find Could Yield 'Exercise Pill'

Irisin sends messages from muscle cells to fat cells

(Newser) - In research that may alarm gym owners, scientists have found a hormone responsible for many of exercise's health benefits. The newly discovered hormone—named "irisin" after the Greek messenger goddess Iris—turns ordinary white fat cells into energy-burning brown fat, and helps ward off diabetes by improving glucose...

Babies Cut Dads' Testosterone
 Babies Cut Dads' Testosterone 
Study says
Sep 13, 2011 5:34 AM CDT

Babies Cut Dads' Testosterone

That makes men better parents, researchers believe

(Newser) - Who knew newborns could have such a significant physical impact on their dads' bodies? Scientists have discovered that fathers experience a significant reduction in their body's testosterone with the birth of a son or daughter. They believe it's Mother Nature's way of making men less interested in...

'Hormone Case' Guys Not Fit for Politics

They can't power penis and brain at same time, notes Robin Williams

(Newser) - Get a grip, fellas. Obviously, many of you have runaway hormone issues that make it impossible for you to behave responsibly in public office. Yet popular culture has always insisted that "women can't be be trusted in positions of power because their judgment might be addled by raging...

Most Plastics Release Hormone-Like Chemicals
BPA-Free Plastics Leach Hormone-Like Chemicals
STUDY SHOCKER
Mar 3, 2011 3:38 AM CST

BPA-Free Plastics Leach Hormone-Like Chemicals

More than 70% of tested plastics released chemicals: study

(Newser) - More bad health news on the plastics front. Even BPA-free plastic products can leach a chemical that acts like the sex hormone estrogen, according to new research. The researchers bought hundreds of plastic products from stores like Wal-Mart and Whole Foods, focusing on products that come in contact with food,...

Warm and Fuzzy Oxytocin Has Its Limits

Hormone fuels good vibes but only towards 'in' group

(Newser) - Oxytocin is a hormone most commonly associated with the close feelings of trust and companionship that lovers and family members feel. But the chemical may have a dark side: new research shows there are limits to the affection it can stimulate, the New York Times reports. Experiments by University of...

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