Health
The real reason for nail-biting and other ‘bad habits,’ according to psychologists
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Nail-biting, procrastination and avoidance are often framed as bad habits we can’t control, but a new psychology book argues that they’re more like survival strategies that may have once protected us.
In “Controlled Explosions in Mental Health,” clinical psychologist Dr. Charlie Heriot-Maitland examined why people stick with bad habits that seem to work against their own best interest.
Drawing on years of clinical research and therapeutic practice, the expert reveals how the brain prioritizes predictability and safety over comfort and happiness.
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“Our brain is a survival machine,” he told Fox News Digital. “It is programmed not to optimize our happiness and well-being, but to keep us alive.”
For much of human history, being caught off-guard could be fatal, research shows. “The brain prefers predictable pain over unpredictable threat,” Heriot-Maitland said. “It does not like surprises.”
Experts say the brain prioritizes predictability and safety over happiness, preferring controlled, familiar discomfort to unpredictable risk. (iStock)
When faced with uncertainty, the brain may opt for smaller, self-sabotaging behaviors rather than risking larger, unpredictable ones.
The book argues that “the brain uses these small harms as a protective dose to prevent further harms.” Procrastination, for example, may create stress and frustration, but it can also delay exposure to the higher-stakes fear of failure or judgment.
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“The central argument is that behaviors we label as ‘self‑sabotaging’ could actually be attempts by the brain to control discomfort,” Thea Gallagher, a psychologist and wellness programs director at NYU Langone Health, told Fox News Digital.
In modern life, threats are often more emotional than physical. Rejection, shame, anxiety and loss of control can activate the same survival systems as a physical threat, experts say.
What looks like self-sabotage is often a way to delay or soften exposure to feared outcomes such as failure, judgment or rejection, an expert said. (iStock)
“Our brains have evolved to favor perceiving threat, even when there isn’t one, in order to elicit a protective response in us,” Heriot-Maitland said.
Self-criticism, avoidance and actions like nail-biting can function as attempts to manage the “dangers.”
Potential limitations
Gallagher noted that the book leans on clinical insight rather than empirical research.
“That doesn’t make it wrong, but it means the claims are more interpretive than scientific,” she said, noting that more data is needed to determine what is happening on a “mechanistic level.”
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Gallagher also emphasized that external factors, such as ADHD, trauma, chronic stress or socioeconomic pressures, can shape these behaviors in ways that aren’t just about threat responses.
Long-term improvement comes from building safety, observing patterns with curiosity, and gradually tolerating uncertainty rather than fighting or appeasing the behavior, an expert advised. (iStock)
Rather than seeing patterns like procrastination as flaws, the book encourages people to understand their protective function. That said, people should seek professional support for destructive behaviors that could cause severe distress or self-harm.
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“I encourage my patients to think about short-term pain for long-term gain, because if you just respond to discomfort and distress in the moment, you might find yourself in longer-term patterns you don’t like or want,” Gallagher said.
“I don’t think it explains the motivations for all people, as everyone is different, but I think it can certainly apply to some.”
“Our brain is a survival machine.”
Heriot-Maitland noted that everyone has a choice in how they handle their own potentially harmful habits.
“We don’t want to fight these behaviors, but nor do we want to appease them and let them carry on controlling, dictating and sabotaging our lives,” he said.
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Gallagher shared the following practical tips for people who may notice these patterns.
No. 1: Shift from self‑judgment to self-compassion
Instead of asking yourself “Why am I like this?” try focusing on the function of the behavior, she advised. For example, does it serve to soothe, numb or distract from other fears or threats?
Understanding the protective function of “bad” behaviors can reduce shame and open the door to more effective change, without excusing harm. (iStock)
No. 2: Notice patterns without fighting them (initially)
“Observing the behavior with curiosity helps weaken the automatic threat response,” Gallagher said.
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No. 3: Build a sense of safety
This can mean relying on grounding techniques, supportive relationships, predictable routines and self‑soothing practices.
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No. 4: Practice small, low‑stakes exposure to feared situations
“If the brain fears uncertainty, gently introducing controlled uncertainty can help retrain it,” the expert recommended.
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Older adults who avoid meat in their golden years may be less likely to reach age 100 than their meat-eating counterparts, new research suggests.
Researchers tracked more than 5,000 adults aged 80 or older who were enrolled in the Chinese Longitudinal Healthy Longevity Survey.
Between 1998 and 2018, data showed that those who did not eat meat were less likely to reach their 100th birthday than those who consumed animal products regularly.
The findings seem to contradict previous studies that have linked vegetarianism and plant-based diets to lower risks of heart disease, stroke, diabetes and obesity.
Most evidence supporting the benefits of plant-based diets comes from studies tracking younger populations, the researchers noted.
The findings contrast with previous research praising plant-based diets for their positive influence on heart health. (iStock)
The study, published in The American Journal of Clinical Nutrition, points to losses in muscle mass and bone density with age, shifts that can increase the risk of malnutrition and frailty in the “oldest old.”
As people enter their 80s and 90s, the nutritional priority often shifts from preventing long-term chronic diseases to maintaining day-to-day physical function, experts say.
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“The headline ‘vegetarians over 80 less likely to reach 100’ sounds surprising, because it contrasts with decades of data linking plant‑forward diets to lower chronic disease risk earlier in life,” Erin Palinski-Wade, a New Jersey-based registered dietitian, told Fox News Digital.
“However, once you see that this research is limited to adults over the age of 80 who are also underweight — and that this link disappears with the consumption of eggs, dairy and fish — the results are less surprising.”
While diets earlier in life tend to emphasize avoiding long-term disease, older age necessitates nutrients and weight maintenance, experts say. (iStock)
In those over 80, restricting animal proteins may be less likely to promote longevity, according to Palinski-Wade, who was not involved in the study.
Eliminating all animal protein — particularly in a population that may already experience diminished hunger cues — can make it more difficult to meet adequate protein needs, potentially increasing the risk of nutrient deficiencies, the nutritionist said.
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In addition to a higher tendency to be underweight, older populations also face a greater risk of bone fractures due to lower calcium and protein intake.
Potential limitations
The lower rate of vegetarians reaching 100 was only observed in participants identified as underweight, the researchers noted. No such association was found in people who maintained a healthy weight.
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Because being underweight is already linked to greater frailty and mortality risk, the researchers noted that body weight may partly explain the findings, making it difficult to determine whether diet itself played a direct role.
Those incorporating animal-sourced products other than meat were just as likely to live to 100. (iStock)
Additionally, the shortened lifespans were not found in people who continued to eat non-meat animal products, such as fish, dairy and eggs.
Older adults with these more flexible diets were just as likely to live to 100 as those eating meat, as these foods may provide the nutrients necessary for maintaining muscle and bone health, the researchers noted.
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“This is an observational study, so it can only show associations, and does not prove that avoiding meat directly reduces the odds of reaching 100,” Palinski-Wade added.
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The researchers suggested that including small amounts of animal-sourced foods could help older seniors maintain essential nutrients and avoid the muscle loss often seen in those who stick strictly to plants.
Eliminating all animal protein — particularly in a population that may already experience diminished hunger cues — can make it more difficult to meet adequate protein needs, potentially increasing the risk of nutrient deficiencies. (iStock)
Palinski-Wade offered some guidance for those looking to optimize nutrition later in life.
“For adults in their 80s and beyond, especially anyone losing weight or muscle, the priority should be maintaining a healthy weight and meeting protein and micronutrient needs — even if that means adding or increasing fish, eggs, dairy or well‑planned, fortified plant proteins and supplements.”
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Strict vegan or very low‑protein patterns at that age should be carefully monitored by a dietitian or clinician, with attention to B12, vitamin D, calcium and total protein, according to Palinski-Wade.
“Younger and healthier adults can still confidently use plant‑forward or vegetarian patterns to lower long‑term chronic disease risk,” she added.
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In a dramatic turn of events that’s captured the attention of animal lovers worldwide, Punch — the young macaque at a zoo in Japan famous for his inseparable bond with a stuffed orangutan toy — has reached a major milestone in his journey toward social integration.
On Thursday, visitors and staff at the Ichikawa Zoological and Botanical Garden witnessed a breakthrough: Punch was seen cuddling with and hitching a ride on the back of a fellow macaque.
Punch’s story began with hardship. He was abandoned by his mother shortly after his birth in July 2025 — and to ensure his survival, zookeepers stepped in to hand-rear the primate.
On Jan. 19, 2026, the zoo officially began the process of reintegrating Punch into the “monkey mountain” enclosure.
The transition was initially fraught with tension.
Punch’s story began with hardship when he was abandoned by his mother shortly after he was born. To help him, zookeepers gave him a stuffed toy that he began dragging around everywhere he went. (David Mareuil/Anadolu via Getty Images)
As a hand-reared infant, Punch was bullied and ignored by the established group of monkeys.
He was often seen huddled alone with his orange plush companion while the rest of the troop interacted.
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In an official statement released Feb. 27, the Ichikawa Zoological and Botanical Garden detailed the meticulous care behind this process.
Previous viral videos showed Punch bullied by the rest of the troop, running to his plushy toy for comfort. (David Mareuil/Anadolu via Getty Images)
“From an animal welfare perspective, our primary goal is to reintegrate Punch with the troop,” the zoo said.
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The strategy involved nursing Punch within the enclosure, so the troop could recognize him as one of their own, and pairing him with a gentle young female macaque prior to his full release to build his confidence.
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The latest footage, captured by X user @tate_gf, suggested the zoo’s patience is paying off.
The video shows Punch seeking physical contact not from his toy, but from another monkey — eventually climbing onto its back for a vital social behavior for young macaques: the “piggyback ride.”
The zoo’s strategy appears to be paying off: Punch, shown at far left, was recently seen riding on the back of a fellow macaque. (David Mareuil/Anadolu via Getty Images)
While Punch still carries his stuffed toy for comfort during moments of perceived danger, the zoo remains optimistic about his progress.
The organization cited the successful 2009 case of Otome, another hand-reared macaque who eventually outgrew her stuffed toy, successfully integrated — and went on to raise four offspring of her own.
The zoo has had crowds coming to see Punch, with hundreds of people lining up to get inside to see the young star, according to reports.
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“I’m hoping Punch has a good life like everybody else does, and think he’s a cute little guy,” one person commented online.
“Such a precious baby,” another person wrote.
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