Well

A “Mistress Dispeller” is an expert at infidelity: part marriage counselor, part private eye. The filmmaker Elizabeth Lo followed one mistress dispeller for three years, and it had a surprising effect on her own love life.

By Anna Martin, Reva Goldberg, Emily Lang, Davis Land, Christina Djossa, Amy Pearl, Sara Curtis, Elisa Gutierrez, Jen Poyant, Lynn Levy, Daniel Ramirez, Dan Powell and Rowan Niemisto

There is no F.D.A.-approved testosterone product for women. Insurance won’t cover it. Many doctors won’t prescribe it. It’s become a cultural phenomenon.

By Susan Dominus

Zohran Mamdani, Andrew Cuomo and Curtis Sliwa will meet onstage Wednesday night for the last time before the general election on Nov 4.

By Talya Minsberg

A new study compared the effects of 30 drugs on cholesterol, blood pressure and weight gain.

By Chloe W. Shakin

More older adults have turned to cochlear implants after Medicare expanded eligibility for the devices.

By Paula Span

More than just dead matter, hair is an archive of your body’s secrets.

By Simar Bajaj

Older players of pickleball, the fastest-growing sport in the United States, are more vulnerable to eye injuries, some of which could lead to vision loss, researchers reported.

By Roni Caryn Rabin

The results of a large study in France are consistent with previous research indicating that Covid vaccination is safe and effective in pregnancy.

By Maggie Astor

The global activist gets candid in her new memoir. She spoke with us about struggling with panic attacks, finding her personal style and changing her mind about what marriage could be.

By Anna Martin, Reva Goldberg, Emily Lang, Davis Land, Christina Djossa, Amy Pearl, Sara Curtis, Elisa Gutierrez, Jen Poyant, Lynn Levy, Daniel Ramirez, Dan Powell, Rowan Niemisto and Elisheba Ittoop

When it’s too cold to go outside, you can still get a good cardio workout on a stationary bike. But you need to do it correctly.

By Amanda Loudin

Experts said the levels were not high enough to cause immediate harm, but raised the risk of long-term health effects.

By Maggie Astor

‘Gray divorce’ is becoming more common. We want to hear about yours.

By Catherine Pearson

The Trump administration’s embrace of unproven or debunked theories about vaccines and Tylenol has left doctors fielding questions from worried parents.

By Gina Kolata and Azeen Ghorayshi

Hundreds of infectious disease specialists have been let go by the Trump administration. Here are four who focused on keeping pandemics at bay.

By Apoorva Mandavilli

Some experts call them a superfood. Here’s why they deserve a spot in your pantry.

By Alexandra Pattillo

Friday’s layoffs swept up scientists involved in responding to disease outbreaks and running an influential journal. Officials said the mistaken dismissals were being rescinded.

By Apoorva Mandavilli and Sheryl Gay Stolberg

A New York Times health reporter explains what makes a good study, and how she knows which papers merit an article.

By Dani Blum

Master this full-body move to build strength and power.

By Alyssa Ages

They aren’t all sudden or intense, experts says.

By Jancee Dunn

Why a start-up brand is associating its boxers and briefs with wellness. Plus, Sandy Liang designs for Gap and new clothes from an old Gucci designer.

By Yola Mzizi

Our Ask the Therapist columnist, Lori Gottlieb, advises a reader who is fed up with a longtime pal’s two-faced behavior.

By Lori Gottlieb

You don’t have to be the life of every party to reap the health benefits.

By Dana G. Smith

A new state law creates the first legal definition of the foods, and may prompt changes in other states.

By Alice Callahan

College students are meeting with “embedded” counselors in residence halls and academic buildings, with promising results.

By Christina Caron

In Thompson’s latest film, she plays an unhappy housewife who blows up her life. In reality, the actor and producer has left relationships with much less fallout.

By Anna Martin, Reva Goldberg, Davis Land, Christina Djossa, Amy Pearl, Sara Curtis, Elisa Gutierrez, Emily Lang, Jen Poyant, Lynn Levy, Daniel Ramirez, Dan Powell, Pat McCusker, Elisheba Ittoop, Marion Lozano and Diane Wong

Don’t let this common injury derail your fall running plans.

By Allessandra DiCorato

Children under 12 need different versions of Covid vaccines, but many pharmacies and pediatricians’ offices aren’t stocking them.

By Maggie Astor

As Americans take more gummies, pills and powders than ever, some physicians are trying to convince patients to be a bit more careful.

By Ashwin Rodrigues

Acetaminophen’s link to autism is unproven. But hundreds of Americans accidentally overdose on the drug each year, suffering liver damage that can require a transplant or even be fatal.

By Rebecca Robbins

For some single women in their 30s and 40s, the desire to have babies adds unwelcome stress to the already fraught process of finding a mate.

By Catherine Pearson

Test your knowledge with this quiz.

By Caroline Hopkins Legaspi and Hoi Chan

Costco members will pay $499 a month out of pocket, the same price offered at CVS and Walmart, and on the manufacturer’s direct-to-consumer website.

By Adeel Hassan

When a fitness reporter traveled to a village in France to meet centenarian yoga teacher Charlotte Chopin, she was reminded that movement didn’t have to be complicated.

By Danielle Friedman

Sam Terblanche was just 20 years old. Can a busy E.R. handle the hardest cases?

By Lisa Miller

More men are now living long enough to develop osteoporosis. But few are aware of the risk, and fewer still are screened and treated.

By Paula Span

You probably don’t need more time.

By Jancee Dunn

The woman, a doctor, was fit and healthy, but even a small amount of exertion left her out of breath.

By Lisa Sanders, M.D.

As our diagnostic categories expand to include ever milder versions of disease, researchers propose that the act of naming a malady can itself bring relief.

By Ellen Barry

Dr. Jeanne Marrazzo, who was on administrative leave, alleged that the Trump administration had defied court orders and undermined vaccine research.

By Benjamin Mueller

The decision enraged opponents of abortion, who have been pressuring the Trump administration to restrict access to abortion medication.

By Pam Belluck

Mixed messaging from federal health officials has caused confusion around the safety of the Covid vaccine for pregnant women. But the shot has been proven to protect women and their babies. Maggie Astor, a Times reporter for Well, explains.

By Maggie Astor and Theodore Tae

Four crew members and 94 passengers came down with norovirus while sailing from San Diego to Miami.

By Claire Fahy

Four books — recommended by psychologists and therapists — can help you strengthen your connections.

By Hope Reese

The vaccines are proven to help protect pregnant women and their babies. But regulatory chaos and mixed messaging have made for a confusing landscape.

By Maggie Astor and Dani Blum

The scientist, who died at 91 on Wednesday, was a model for healthy aging.

By Dana G. Smith and Nina Agrawal

A reporter plunged in to find out.

By Melissa Kirsch

We want to hear your stories of living with cancer as a younger adult.

By Nina Agrawal

Gail Rice felt like time was running out. So she splurged on a sexual adventure.

By Anna Martin, Reva Goldberg, Emily Lang, Davis Land, Christina Djossa, Amy Pearl, Sara Curtis, Jen Poyant, Lynn Levy, Daniel Ramirez, Dan Powell and Marion Lozano

In the last decade, more than a dozen types of cancer have risen among people under 50. Scientists don’t have all of the answers, but research is starting to offer clues.

By Nina Agrawal

Families of people with severe autism say the repeated expansion of the diagnosis pushed them to the sidelines. A new focus on the disorder has opened the way for them to argue their cause.

By Azeen Ghorayshi

New York Road Runners races that used to take months to sell out are now filling up in days. Some races have been in such high demand that the sign-up queues crashed the website.

By Talya Minsberg

The new research provides evidence that Covid reinfections can increase the risk of long-term health consequences.

By Pam Belluck

A state-level preview of the Big Beautiful Bill’s Medicaid reforms didn’t improve employment or result in gains in insurance coverage.

By Simar Bajaj

For decades, Charlotte Chopin has been bending and stretching in Léré, a village in France. Here’s how she keeps moving.

By Danielle Friedman

At 102 years old, Charlotte Chopin’s day consists of a simple breakfast, spending time outdoors and teaching yoga.

By Theodore Tae and Antoine Castagné

A campus movement aims to find out what happens when college students forgo phones for in-person connection.

By Christina Caron

Many scientists were pleased to learn that N.I.H. funding will go to leading experts examining complex new theories, not only fears over vaccines.

By Benjamin Mueller

The United States depends heavily on physicians trained abroad. The Trump administration’s new fees may exacerbate personnel shortages, especially in underserved regions.

By Roni Caryn Rabin

A gene therapy injected into patients’ brains slowed progression of the disease by 75 percent, preliminary findings reported.

By Dana G. Smith

Shane Tamura, a former high school football player, shot himself and left a note that said his motive was anger at the N.F.L.

By Ken Belson and Chelsia Rose Marcius

Chatbots want to be your friend, when what you really need is a neutral perspective.

By Simar Bajaj

Even if you’re diligent about caring for your teeth, you might be overlooking your gums.

By Jancee Dunn

We surveyed leading nutrition experts to reveal the truth about raw milk, lactose intolerance, low-fat dairy and more.

By Caroline Hopkins Legaspi

We want to hear about it.

By Teddy Rosenbluth

Our Ask the Therapist columnist, Lori Gottlieb, advises a reader who worries that her grandchildren are being harmed by their parents’ messy relationship.

By Lori Gottlieb

Mr. Trump, who implored pregnant women not to take Tylenol, is only the latest in a long line of people offering unsolicited advice to expectant mothers.

By Catherine Pearson

It can be hard to sort through the conflicting and evolving information about vaccines. Here’s the latest guidance on Covid boosters, flu shots, childhood immunizations and more.

By Maggie Astor, Dani Blum, Teddy Rosenbluth, Apoorva Mandavilli, Reed Abelson and Emily Baumgaertner Nunn

Spanish researchers say Maria Branyas Morera, who lived to 117, won a genetic lottery. But experts caution that healthy genes and microbiomes don’t explain longevity on their own.

By Gina Kolata

Low- and middle-income countries will be able to purchase an effective preventative at a reduced price. The arrangements may help stem the epidemic 40 years after it began.

By Apoorva Mandavilli

It’s among the most common cancers affecting older men. But a diagnosis today isn’t always what it seems.

By David Dodge

The director and actor on the power of “yes, and …” in relationships.

By Anna Martin, Reva Goldberg, Emily Lang, Davis Land, Christina Djossa, Amy Pearl, Sara Curtis, Jen Poyant, Lynn Levy, Daniel Ramirez, Pat McCusker, Aman Sahota, Rowan Niemisto, Carole Sabouraud and Dan Powell

Fevers during pregnancy can be dangerous, and acetaminophen is the go-to treatment for them. Doctors worry what will happen if women are afraid to take it.

By Maggie Astor

We asked experts in health and aging about what women really need to do to live longer.

By Dana G. Smith

President Trump said on Monday that Tylenol use during pregnancy could lead to autism, a claim that is unproven.

By Maggie Astor, Dani Blum and Christina Caron

The F.D.A. announced Monday that it would change the drug’s label to reflect potential benefits in reducing autism symptoms.

By Christina Caron

Kenvue, a two-year-old spinoff from Johnson & Johnson, is confronting a public-relations nightmare as President Trump and others suggest unproven links between the pain reliever and autism.

By Rebecca Robbins

For decades, researchers have looked for links. Most believe the disorder springs from a complex interplay of genetics and environmental factors.

By Emily Baumgaertner Nunn and Azeen Ghorayshi

Top U.S. health officials urged pregnant women not to use acetaminophen, the active ingredient in Tylenol, claiming it could cause autism, though studies have been inconclusive.

By Azeen Ghorayshi

The dental procedure is one of the most dreaded. Here are six of its most common causes.

By Susan Shapiro

The Trump administration has restored promised funds to a program that teaches people in health care how to work with aging Americans.

By Paula Span

The “zone zero” fitness trend promotes very low-intensity movement, like walking and housework. Here’s what it can — and can’t — do for you.

By Danielle Friedman

Marijuana during pregnancy is linked to poor birth outcomes and developmental delays in children, a leading medical society advised.

By Roni Caryn Rabin

Tutoring Olympians, he created a simple workout formula that was said to produce the best results with the least effort, earning accolades across the running world.

By Jeré Longman

Some women in the country’s capital are turning to midwives who they say offer a more holistic approach to care than hospitals usually provide.

By Paulina Villegas and Greta Rico

The panel recommended that people consult a health professional before receiving a Covid vaccine. Left unclear was whether Americans can still walk into pharmacies for shots.

By Apoorva Mandavilli

You’re both rattled. You feel out of sorts. Here’s how to get back on track.

By Jancee Dunn

Men seek weight loss treatment far less often than women. Doctors are concerned.

By Simar Bajaj

It might sound counterintuitive, but your relationships can benefit from rules and limitations.

By Christina Caron

The members voted against the combination shot for measles, mumps, rubella and chickenpox. Guidelines on vaccines given separately to prevent those infections remain unchanged.

By Apoorva Mandavilli

New research in amateur football and soccer players has identified some potential early warning signs of C.T.E.

By Dana G. Smith

The guidelines, from California, Oregon, Washington and Hawaii, mirror those of major medical organizations. They were issued a day before an advisory panel was set to meet to review potential changes to federal recommendations.

By Emily Baumgaertner Nunn

The president wants to enforce involuntary commitment laws for severe drug use. But rehab is expensive, without enough beds for those who seek it.

By Jan Hoffman

The “Eat, Pray, Love” author on healing from the sex and love addiction that almost destroyed her life.

By Anna Martin, Reva Goldberg, Emily Lang, Davis Land, Christina Djossa, Amy Pearl, Sara Curtis, Jen Poyant, Lynn Levy, Daniel Ramirez, Elisheba Ittoop, Dan Powell, Rowan Niemisto and Pat McCusker

A few basic guidelines help us ensure we’re finding and interviewing the right sources for health and wellness news.

By Teddy Rosenbluth

The taboo against pork is deeply entrenched in both religious traditions. But the prohibition is not absolute.

By Roni Caryn Rabin

Committee members, some of whom are vaccine skeptics, are likely to recommend restricting the use of the shots at birth or delaying them until later in childhood.

By Apoorva Mandavilli

Rates of the disease have fallen since 1991, when all newborns began receiving the shot. President Trump recently said he thought children should not get it until age 12.

By Dani Blum

Though some researchers believe it should be labeled endemic in the United States, most Americans don’t need to worry about getting sick.

By Simar Bajaj

There are thousands of options that promise to boost your fitness. Only a handful are backed by solid evidence.

By Alex Hutchinson

Many people assume coverage for teeth works the same as other insurance. It doesn’t.

By Erica Sweeney