Health
Sleep doctor reveals the brutal health downside of daylight saving time
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The Trump administration is taking another look at ending biannual clock changes, with an eye toward making daylight saving time (DST), or the “summer clock,” permanent.
On May 21, the House Energy and Commerce Committee advanced legislation that would make daylight saving time permanent in a 48-1 vote, part of a largely bipartisan push to end twice-yearly clock changes.
Although gaining extra winter evening daylight might seem like a win, health experts say permanent daylight saving time could disrupt people’s natural circadian rhythms.
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In an interview with Fox News Digital, Dr. Wendy Troxel, a licensed clinical psychologist and senior behavioral scientist at RAND based in Utah, said science is being “misconstrued” in this decision.
“Ending the biannual clock change is something most sleep scientists and the public would welcome,” she said. “The disruption of springing forward every March is associated with real, measurable harm — spikes in car crashes, heart attacks and sleep deprivation.”
The Trump administration is taking another look at ending semiannual clock changes, with an eye toward making daylight saving time, or the “summer clock,” permanent. (iStock)
However, Troxel noted, implementing permanent daylight saving time is “not supported by science.” Instead, evidence “strongly supports” permanent standard time, or the “winter clock,” according to the expert.
Major sleep medicine organizations, including the American Academy of Sleep Medicine, have previously supported adopting permanent standard time over permanent daylight saving time.
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“Standard time is more closely aligned with human circadian biology, meaning the relationship between light, darkness and our internal clocks remains intact,” Troxel said.
“Permanent DST simply shifts an hour of morning sunlight to the evening, and there are significant health and safety costs of that trade.”
“Standard time is more closely aligned with human circadian biology,” the expert said. (iStock)
The U.S. attempted permanent DST in the early 1970s, but the plan was aborted in part due to these “morning consequences,” according to the sleep expert.
“Within a year, the law was repealed amid public displeasure with commuting to work and school in the dark and increases in morning car crashes, and with no demonstrable impact on energy savings,” Troxel told Fox News Digital.
Why morning sunlight matters
Human circadian rhythms are primarily “anchored” by morning light, Troxel said. Under permanent DST, most people waking up for work or school would be rising before the sun, which forces a “chronic misalignment between the body’s internal clock and the external world.”
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“You cannot override that biology by simply shifting external clocks forward,” the expert said. “What you get instead is a population that is effectively waking up in the middle of their biological night, every single day.”
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The public has typically supported having more daylight in winter evenings, which could alleviate mental health conditions such as seasonal depression.
Supporters of permanent daylight saving time argue that later evening daylight could encourage outdoor activity, recreation and consumer spending after work or school.
Morning light is “crucial to regulate sleep, [boost] alertness and support mental health,” according to a sleep expert. (iStock)
Troxel agreed that light is a “powerful regulator” for sleep and moods, but noted that not all types have the same benefits.
“Morning light is crucial to regulate sleep, alertness and support mental health, and this would be sacrificed with permanent daylight saving time,” she noted.
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In some areas of the country, like Utah, Americans wouldn’t see the sunrise until about 9 a.m. in the winter, which some research has linked to higher rates of depression and seasonal mood challenges.
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“More evening light may feel enjoyable, in part because we equate it with lovely summer evenings, but permanent daylight saving time does not mean permanent summer,” Troxel emphasized. “It just means we will get less morning sunlight and more evening sunlight.”
“Exposure to light in the evening further pushes circadian rhythms later, making it more difficult to fall asleep and harder to wake up in the morning.”
Risks for vulnerable groups
Permanent daylight saving time can intensify people’s habit of “bedtime procrastination,” deepen sleep deprivation and contribute to the widespread public health issue of insufficient sleep already identified by the Institute of Medicine, according to Troxel.
Teens are most at risk of mental health complications if permanent DST extends darkness in the morning. (iStock)
Various studies have shown that people typically sleep less in summer compared to winter. Troxel said this is particularly concerning in a society where one in three people are already getting insufficient shuteye.
“This is especially alarming for teenagers, a population the U.S. surgeon general has identified as being in a mental health crisis,” she cautioned.
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For example, a teen waking up at 6:30 a.m. for an 8 a.m. school start time under permanent DST would be rising biologically at 5:30 a.m., Troxel noted, which is “in the middle of their biological night.”
“Framing permanent DST as a fix for seasonal depression gets the science exactly backwards,” she added.
Fox News Digital’s Alex Nitzberg contributed to this report.
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America’s youth have been increasingly abusing common over-the-counter medications, according to poison center records.
A health advisory from America’s Poison Centers, representing 53 poison centers across the country, alerted a “concerning rise” in cases of diphenhydramine abuse among teens ages 13 to 19.
Diphenhydramine is commonly found in allergy and sleep medications such as Benadryl and Zzzquil, as mentioned in the advisory.
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From 2024 to 2025, the total exposure to any substance among teens in this age group reportedly increased by 5.1%.
But cases involving diphenhydramine alone increased more rapidly, from 10,068 to 13,284 cases, a 32% spike.
Thirteen percent of diphenhydramine cases in 2026 have been linked to intentional abuse, an increase from 7.3% in 2020. (iStock)
The trend appears to be continuing into 2026, as the first five months saw 6,179 diphenhydramine-only cases in teens — more than double the prior year.
According to America’s Poison Centers, the exposure appears to be driven by recreational misuse rather than accidental over-medication. Thirteen percent of cases in 2026 were linked to intentional abuse, up from 7.3% in 2020.
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Taking diphenhydramine improperly or in large amounts can affect the brain and heart, and can lead to serious or life-threatening effects, the advisory warned.
Diphenhydramine is commonly found in over-the-counter allergy and sleep medications. (iStock)
Some symptoms of diphenhydramine poisoning include drowsiness, agitation, fast heart rate, nausea, vomiting, hallucinations, seizures, dangerous heart rhythm and loss of consciousness.
To avoid overexposure and complications, America’s Poison Centers advises the public to store all medications safely, up high, and out of reach of kids and teens. Label instructions should be followed carefully.
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“Talk with teens about the risks of misusing medications, including serious health effects and poisoning,” the notice suggested. “Be aware of social media trends or challenges that may encourage unsafe use of medications.”
Those who suspect misuse should contact the local Poison Control Center immediately.
America’s Poison Centers advises the public to “be aware of social media trends or challenges that may encourage unsafe use of medications.” (iStock)
In a statement to Fox News Digital, Benadryl manufacturer Kenvue commented that the “health and safety of people who use our products is our top priority.”
“The social media trend promoting misuse of diphenhydramine-containing products is extremely dangerous and should be stopped immediately,” a Kenvue spokesperson said. “Our hearts go out to those impacted by the misuse of diphenhydramine-containing products.”
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“We are working with social media platform safety teams to remove these dangerous posts and help stop this behavior from spreading,” they added. “We are also taking action to educate on the safe use and storage of over-the-counter medicines, including those with the ingredient diphenhydramine.”
“The social media trend promoting misuse of diphenhydramine-containing products is extremely dangerous and should be stopped immediately.”
Mary Leonard, SVP of communications and public affairs for the Consumer Healthcare Products Association, called the recent report “deeply concerning.”
“OTC medicines should never be used for recreational purposes, and intentional misuse should not be confused with the safe, effective use of these products,” she told Fox News Digital. “When used as directed, millions of Americans rely on OTC medicines containing diphenhydramine for relief from allergies, cold symptoms, motion sickness, minor skin irritations and occasional sleeplessness.”
“Because misuse of any medication can result in serious health consequences, the Drug Facts label clearly communicates dosing instructions, warnings and other important safety information.”
“OTC medicines should never be used for recreational purposes, and intentional misuse should not be confused with the safe, effective use of these products,” an industry spokesperson said. (iStock)
Kenvue shared the following three steps people can take to help prevent misuse.
- Report content related to this trend on the social media platform where it appears.
- Always store OTC medicines up and away in places children cannot access — preferably in locked cabinets or containers — and never leave medications on counters, bedside tables or in open bags, even temporarily.
- Carefully read and follow the instructions on the label and educate children on safe usage.
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“Dosing instructions and additional safety information are available on Benadryl.com, and always remember to consult a healthcare professional should you have questions,” the spokesperson added.
Fox News Digital reached out to Zzzquil maker P&G for comment.
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