Teens are increasingly using customizable social companion apps like Replika, CHAI, and Character.AI to duplicate the experience of having a close platonic friend or even a romantic partner. According to recent research by Common Sense Media, 72 percent of survey participants between the ages of 13 and 17 have used an AI companion at least once, and more than 50 percent use them a few times a month. These apps have become so popular that investment firm ARK Invest projects that the AI social companion market may reach as much as $150 billion in revenue by the end of the decade.

But while AI social companions can serve a similar function as mental-health chatbots, providing support and encouraging reflection, they run the risk of doing so at the expense of a nuanced understanding of human relationships. As Dr. Jodi Halpern, a psychiatrist and professor at the UC Berkeley School of Public Health, notes, “We don’t want a perfectly smooth, frictionless thing as a relationship.” Despite some AI social companion apps being marketed to people as young as 13, the researchers at Common Sense Media recommend that teens avoid the apps until after they turn 18.

A new UK study shows that vaccinating pregnant women against RSV has led to a staggering 72% drop in hospitalizations of newborns with severe lung infections. By passing virus-fighting antibodies to their babies, vaccinated mothers are helping shield infants during their most vulnerable early months.

In a groundbreaking UK first, eight healthy babies have been born using an IVF technique that includes DNA from three people—two parents and a female donor. The process, known as pronuclear transfer, was designed to prevent the inheritance of devastating mitochondrial diseases passed down through the mother’s DNA. The early results are highly promising: all the babies are developing normally, and the disease-causing mutations are undetectable or present at levels too low to cause harm. For families once haunted by genetic risk, this science offers more than treatment—it offers transformation.

Kids who consume artificial and natural sweeteners like aspartame, sucralose, and glycyrrhizin may face an increased risk of early puberty, especially if they carry specific genetic markers. This large-scale Taiwanese study links sweeteners to hormonal changes and gut bacteria imbalances that can speed up puberty, with effects differing between boys and girls. Early onset puberty has been tied to serious health consequences later in life, including emotional stress and metabolic disorders. The findings could reshape dietary recommendations and encourage genetic screening to mitigate long-term risks.

Midlife sleep habits may matter more than previously thought. A large study finds that poor sleep, alongside high blood pressure and nicotine use, sharply increases the risk of heart problems in menopausal women yet only 1 in 5 score well on overall heart health.

Summer jobs are harder to land this year, with fewer openings at places like restaurants, stores, and amusement parks. But teens across the country aren’t giving up. Many have been applying early and often, determined to earn money and gain real-world experience.

Even with challenges like competition from adults and more selective hiring, teens are getting creative—handing out résumés in person, picking up babysitting gigs, or joining programs like the Boys & Girls Clubs to boost their job skills. The job market may be cooling, but teen motivation is heating up.

A group of scientists studying pregnancy across six different mammals—from humans to marsupials—uncovered how certain cells at the mother-baby boundary have been working together for over 100 million years. By mapping gene activity in these cells, they found that pregnancy isn’t just a battle between mother and fetus, but often a carefully coordinated partnership. These ancient cell interactions, including hormone production and nutrient sharing, evolved to support longer, more complex pregnancies and may help explain why human pregnancy works the way it does today.

Researchers testing urine from 2- to 4-year-olds in four U.S. states uncovered 96 different chemicals, many of them unmonitored and linked to hormone and brain disruption. Legacy toxins like triclosan are slowly declining, yet replacements such as DINCH plasticizer and modern pesticides are rising. Toddlers—especially the youngest, later-born, and those from minority groups—often carried higher levels than their own mothers. Scientists urge expanded biomonitoring and stricter regulations before these invisible pollutants derail early development.

Teen vaping is changing fast — and not in a good way. A large national study found that more adolescents are vaping THC, CBD, and especially synthetic cannabinoids, which are often unregulated and far more dangerous. Even more troubling, many teens don’t know what’s in their vape pens at all. Researchers also found that girls are now more likely than boys to vape these substances. As these mysterious and risky chemicals gain popularity, scientists are sounding the alarm about the urgent need for better education, regulation, and awareness.

Teens are being misled by cannabis edibles dressed up like health foods. Bright colors, fruit imagery, and words like vegan make these products look fun, natural, and safe even when they re not. A WSU study warns that this could increase the risk of underage use and urges new packaging rules based on what actually appeals to teens.

With summer temperatures rising, health officials are reminding everyone to take precautions against heat-related illness. High heat and humidity make it harder for the body to cool itself, increasing the risk of heat exhaustion or heat stroke. Teens, athletes, young children, and people with health conditions are especially at risk.

To stay safe, drink plenty of water, wear lightweight clothing, and avoid outdoor activity during peak heat hours (10 a.m. to 4 p.m.). Spend time in air-conditioned places when possible, and never leave people or pets in parked cars. Staying informed and prepared can prevent serious health problems.

Teens might finally have a good reason to sleep in on weekends within limits. A new study reveals that teenagers who get up to two extra hours of sleep on weekends show fewer anxiety symptoms than those who don t. But go beyond that sweet spot, and symptoms can actually increase.

A growing number of teens are rethinking the traditional college path. According to a new survey from American Student Assistance, only 45 percent of students in grades 7–12 expect to attend a two- or four-year college, down from 73 percent in 2018. Meanwhile, interest in nondegree options like trade schools, apprenticeships, and “boot camps” has increased significantly, rising to 38 percent.

School counselors say it’s important for students to explore all available pathways after high school. Despite a lingering stigma around non-college options, many teens are focused on finding the best route to a successful career. Planning early and identifying personal strengths can help students make informed decisions about their futures.

Teens are diving into intense skincare routines inspired by TikTok, often slathering on six or more products daily, sometimes over ten in just minutes, chasing beauty ideals that favor lighter, flawless skin. But new research warns this digital trend comes at a high cost: irritation, allergies, and deep-seated social pressures around race and beauty.

Making a discovery with the potential for innovative applications in pharmaceutical development, a microbiology student has found a long sought-after fungus that produces effects similar to the semisynthetic drug LSD, which is used to treat conditions like depression, post-traumatic stress disorder and addiction.

A new report from the Environmental Working Group (EWG) shows that most sunscreens on store shelves aren’t as safe or effective as you’d think. Out of over 2,200 products tested, fewer than 500 actually protect your skin the way they should. Some even include sketchy ingredients that could mess with your hormones or increase health risks.

The report calls out outdated rules and sneaky marketing that make it hard to know what’s safe. If you want to protect your skin (and avoid sunburns or worse), stick to lotions or sticks instead of sprays, go for fragrance-free options, and look for the EWG Verified® label. And don’t forget: Reapply often, wear a hat and sunglasses, and try to stay out of direct sun from 10 a.m. to 4 p.m.

The timing and consistency of your daily activity might be associated with improved cardiorespiratory fitness and walking efficiency.

Source: Nemours Foundation

Becoming a new mother brings more than just joyful chaos it delivers a profound and persistent sleep shock. A new study reveals that first-time moms lose not just total sleep, but crucial uninterrupted sleep, especially in the first week postpartum. While overall sleep gradually returns to normal, mothers continue to wake frequently, drastically disrupting sleep structure and leaving them exhausted. This fragmented sleep may even contribute to postpartum health issues, making continuity of rest not just total hours a vital target for interventions.

A new study suggests that boys who become overweight in their early teens risk damaging the genes of their future children, increasing their chances of developing asthma, obesity and low lung function.