Health
Tea Leaves Can Steep Away Lead, Study Finds
Tea leaves pull heavy metals from water, significantly lowering the amount of lead and other dangerous compounds that people may be unknowingly drinking, a new study found.
Recent research has highlighted potential applications for used tea leaves, from biofuels to gluten-free cookies. But the new study shows a public health benefit from something that countless people are already doing. About five billion cups of tea are consumed each day around the world, according to one estimate.
“You can see the implications,” said Vinayak Dravid, a materials scientist at Northwestern and an author of the study, which was published this week. “How often do we touch billions of people?”
In many countries, the water used to steep tea is contaminated with lead from aging pipes. In the United States, nine million homes get their water through pipes that contain lead, according to the Environmental Protection Agency. Lead is especially dangerous to children. Exposure can lead to developmental delays and behavioral issues.
Dr. Dravid and his team tested how different types of tea — black, white, oolong, green, rooibos, herbal, loose leaf and plain old Lipton — behaved in water with varying amounts of lead.
The tea was then allowed to steep for variable periods of time. Afterward, the scientists measured how much lead remained in the water.
Compounds called catechins in tea leaves act like “little Velcro” hooks to which lead molecules latch, said Michelle Francl, a chemist at Bryn Mawr College and the author of a book on the chemistry of tea. Dr. Francl also said that the “ridges and valleys” of the tea leaves provided the necessary surface area for that interaction.
While those properties have been known for some time, Dr. Dravid and his colleagues were the first to look at the lead-detoxifying powers of a single cup of tea. They found that black tea leaves became wrinkled after roasting and were thus best equipped to absorb heavy metals.
“Green tea and black tea had fairly equivalent amounts of metal absorbed,” said another author, Benjamin Shindel, who was a doctoral candidate at Northwestern while working on the study.
White tea, on the other hand, undergoes a much more gentle preparation. Its leaves remain smooth, offering less surface area from which to draw heavy metals from water. Herbal tea enthusiasts may be disappointed to learn that chamomile tea does a poor job of heavy-metal filtering, too, probably because it is made with chamomile flowers, not tea leaves.
Still, these distinctions between different types of tea were not the most relevant factor. “It’s much more important how long you’re brewing the tea for,” Dr. Shindel said.
The researchers found that steeping a cup of black tea for five minutes could remove 15 percent of lead from the water, which is helpful, but there is “no safe level” of lead exposure, according to the E.P.A.
“With lead and other contaminants, any decrease is meaningful to some extent, especially if you have a lack of resources or infrastructure that would already remediate some of these problem materials,” said Caroline Harms, who was an undergraduate student of Dr. Dravid at Northwestern while working on the study.
The longer the steeping time, however, the more bitter the resulting tea. Last year, Dr. Francl caused a minor international scandal by suggesting that adding salt to tea could mitigate its bitterness. But even that controversial chemistry hack has its limits. “It’s not really drinkable after 10 minutes of steeping tea, and no amount of salt is going to help that,” she said.
Some samples in the study had to be steeped for 24 hours, which would render the tea undrinkable.
The study’s authors said they were less motivated to make public health prescriptions for policymakers than to study a hidden benefit of a global habit.
The researchers estimated that a country where people drank large amounts of tea would have about 3 percent less lead ingestion from the water supply than a (hypothetical) identical country that did not drink any tea.
“How wonderful,” said Henrietta Lovell, the founder of the Rare Tea Company. Ms. Lovell, who supplies teas to exclusive restaurants, pointed out that tea had been used in China for medicinal purposes for thousands of years. “The more I learn about tea, the more fabulous and fascinating it becomes,” Ms. Lovell said.
Dr. Francl believes that the new findings could eventually pave the way to a scalable method of making sure people aren’t ingesting heavy metals. “Given that clean water is such a global issue,” she said, “if there was a way to take this proof of concept and tweak it to produce potable water at the end, that would be pretty good.”
Health
Family pleads for help as teen faces life-threatening bone marrow failure
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A New York City father is desperately seeking a donor to save his teenage son’s life.
Max Uribe, now 15 and a high-school freshman, has just weeks until he will need to be hospitalized with a rare blood disorder that could lead to a deadly cancer.
“Max was just 6 when we first noticed there was something wrong with his blood counts,” his father, Juan Uribe, told Fox News Digital. “At the time, we thought it was due to a viral infection, but they never fully recovered back to their normal level.”
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In December 2024, Max’s condition grew worse, and he was diagnosed with clonal cytopenia, a condition involving the blood and bone marrow.
“All three of his blood counts are low — red, white and platelets,” Uribe said.
Max Uribe, pictured with his parents and sister, is in urgent need of a stem cell transplant to save his life. (Uribe Family)
In August 2025, another bone marrow biopsy revealed that Max is on a path to bone marrow failure, creating an urgent need for a stem cell transplant.
“The disease has continued to progress, as his blood counts continue to drop, and therefore, we have to take him to transplant in May of this year,” Uribe said.
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If left untreated, Max’s condition could lead to MDS (myelodysplastic syndrome), a type of blood cancer, and from there possibly into acute myeloid leukemia (AML).
A bone marrow match must have a specific type of HLA (human leukocyte antigen), which are proteins found on the surface of most cells in the body, according to the National Marrow Donor Program (NMDP).
Max Uribe, pictured with his parents, will be hospitalized for a transplant in May, as his blood count has been steadily decreasing. (Uribe Family)
The closer the donor’s HLA markers are to the patient’s, the more likely the body will accept the new cells without a high risk of complications.
People from the same ethnic background are more likely to share similar HLA types, meaning a patient is most likely to find a compatible donor among individuals with similar ancestry, per the NMDP.
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Non-Hispanic White patients have a 79% chance of a perfect match. That drops to 49% for Hispanic/Latino patients, 29% for Black patients and even lower for mixed ancestries, the NMDP reports.
Because Max is a “very rare combination” of half-Colombian from his father and a mix of Italian, British and German from his mother, his path to a perfect match is proving much more difficult, Uribe noted.
“For a kid like Max, with complex, mixed heritage, the math is devastating.”
“For a kid like Max, with complex, mixed heritage, the math is devastating,” he said. “The thinking is, we need large numbers if we’re going to have that perfect match for my son.”
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Max, who participates in competitive tennis and varsity wrestling, just had additional blood work done on Friday, which revealed that his counts continue to plummet.
“We’re at the point where this is beginning to manifest a bit more, which is why the urgency is so critical,” Uribe said.
Because Max is a “very rare combination” of half-Colombian from his father and a mix of Italian, British and German from his mother, his path to a perfect match is proving much more difficult. (Uribe Family)
If a donor is not secured by Max’s hospitalization in May, the medical team will have to proceed with a partial match, which is not ideal for a number of reasons.
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“The survival rate is meaningfully lower with a partial match, and there’s more risk of graft versus host disease (GVHD), which could lead to complications in the process,” Uribe said. With GVHD, the donor cells begin to attack the body.
Max Uribe, an active athlete, is on a path to bone marrow failure, requiring a stem cell transplant. (Uribe Family)
To help prevent this with a partial match, Max would likely need chemotherapy and immunosuppressants for a longer period of time, which could weaken his immune system.
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Anyone interested in donating can order a free test kit on the Team Max website. The kit includes a quick cheek swab that is sent back to the lab to determine whether someone is a match.
Health
Eat This Before Bed To Lose Weight Overnight: ‘Second Meal Effect’ Explained
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Health
The real reasons you’re still exhausted after 8 hours of sleep, according to an expert
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Getting a full eight hours of sleep and still feeling drowsy? Sleep experts say it’s not just about how much shuteye you get.
Dr. Wendy Troxel, a licensed clinical psychologist and senior behavioral scientist at RAND based in Utah, emphasized the “really important distinction” between quantity and quality of sleep.
SLEEP PATTERNS COULD PREDICT RISK FOR DEMENTIA, CANCER AND STROKE, STUDY SUGGESTS
“Many people will say, ‘Man, I’m sleeping enough, I got seven to eight hours of sleep, but I still wake up feeling groggy and not refreshed,’” she told Fox News Digital during an in-studio interview. “About one in three adults has non-restorative sleep quality.”
Sleep quality could be making you feel groggy, despite the number of hours you slept, an expert said. (iStock)
“There are many factors that can contribute to poor sleep quality, regardless of how many hours you slept,” Troxel noted.
These include drinking alcohol — a “major contributor” to poor quality or disrupted sleep — and consuming caffeine late in the day.
Being stressed or feeling worried about something can also contribute to fragmented sleep, as can phone use at bedtime.
CHANGE TO NIGHTLY EATING HABITS MAY HELP PROTECT YOUR HEART, STUDY SUGGESTS
Troxel addressed the belief that women need more sleep than men, noting that research does support it — though only slightly, by about 10 to 15 extra minutes per night.
“What we absolutely know is that women’s sleep quality often suffers more than men’s,” she said. “They may be getting more non-restorative sleep quality, therefore needing slightly more sleep.”
Women are also twice as likely to have insomnia compared to men, and their risk for sleep disturbances “skyrockets” during the menopausal transition.
Women suffer from poorer sleep quality than men, according to the expert. (iStock)
For those who claim they sleep better with fewer hours of sleep — and feel sleepier when they get the recommended seven to nine hours — Troxel said this is not an indicator that they actually require less shuteye. “It’s simply that their body is not used to it,” she said.
Laboratory studies have shown that sleep deprivation causes impairments in judgment, according to the expert. “That means someone who thinks they’re fine with only four hours of sleep per night likely isn’t aware of the impact sleep deprivation has on their cognition and performance.”
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For those getting less than the recommended amount, Troxel recommends taking small steps toward sleeping longer. That might mean adding about 15 minutes each night to see how it impacts the body, eventually getting into a healthier circadian rhythm.
“You will likely see benefits when you increase your sleep in small increments,” she said.
The expert recommends adding a few extra minutes of sleep each night to work up to a longer duration of rest. (iStock)
Tips for better quality sleep
Quality sleep hinges on following a healthy lifestyle and a consistent sleep-wake schedule, according to experts.
INSUFFICIENT SLEEP LINKED TO MAJOR HIDDEN HEALTH RISK, STUDY REVEALS
Eating a nutritious diet free of foods that cause upset stomach or indigestion, especially in the late evening hours, can help improve sleep quality, Troxel shared.
“You don’t want to be starving at bedtime, but you also don’t want to be trying to fall asleep on a full stomach while your body’s still actively digesting,” she said.
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Exercise helps to promote quality sleep, just as sleep also improves exercise quality. However, it’s best to avoid vigorous physical activity too close to bedtime, Troxel advised.
“Exercise is very stimulating, particularly if it’s in a social environment, and that can disrupt sleep,” she said. “Exercising earlier in the day is better.”
“Those who are natural morning people are more likely to benefit from exercising earlier,” Troxel said. (iStock)
That doesn’t have to mean working out first thing in the morning, Troxel noted, as not everyone’s circadian rhythm supports early wake-ups for exercise.
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“Those who are natural morning people are more likely to benefit from exercising earlier,” she said. “If you’re a night owl, don’t expect to love doing a workout first thing in the morning. That might not be consistent with your circadian rhythm.”
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Troxel added that people should not be “sleep-shamed” for adhering to their own internal clocks.
“These cultural trends have these subtle, or not-so-subtle, ways of undermining people’s sleep-wake biology, which is largely out of our control,” she said.
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