Being ‘too skinny’ could actually kill you sooner than obesity: New study reveals hidden dangers of being underweight

A recent study indicates that overweight and moderately obese individuals may not have higher mortality risks than those with smaller BMI.
We all hear a lot about how being overweight can affect your health, but being too skinny isn’t always harmless either. Going to extremes and trying to stay super lean can actually take a toll on your body. A new study published on September 14 in the European Association for the Study of Diabetes (EASD) challenges much of what we thought we knew about health and body weight.
Researchers followed nearly 86,000 people, mostly women in their mid-60s, over five years, comparing their BMI to mortality rates. (Also read: Woman who lost 18 kg says ‘I started losing weight much faster when I changed this 1 thing in my diet’; shares her tips )
What is the “ideal” BMI for survival
The findings revealed that the “upper-normal” BMI range of 22.5–25 is the sweet spot for survival. People in the “lower-normal” range (18.5–20) or even the “middle-normal” range (20–22.5) were significantly more likely to die than those in the upper-normal group. Those classified as underweight (BMI < 18.5) were nearly three times more likely to die.

Interestingly, individuals who were overweight (BMI 25–30) or moderately obese (BMI 30–35) didn’t show higher mortality compared to the upper-normal group. This supports the “fat but fit” idea: carrying extra weight isn’t necessarily deadly if other health factors are under control.
That said, this doesn’t mean you should start overeating in the name of health. People with severe obesity (BMI > 40) faced a mortality risk more than twice as high as those in the upper-normal range.
Does body composition matter more than weight
Body composition matters too. Visceral fat, the deep belly fat around organs, can disrupt metabolism far more than a little extra weight elsewhere on the body. While BMI isn’t a perfect measure of health, this study adds to growing evidence that we need to rethink what a “healthy body” truly looks like. Health isn’t just about being skinny, it’s about balance, body composition, and overall well-being.
ABOUT THE AUTHORAkanksha AgnihotriAkanksha Agnihotri is a lifestyle journalist with over 3 years of experience. She is a psychology graduate and holds a postgraduate diploma in Radio and Television Journalism from the Indian Institute of Mass Communication, Delhi, where she graduated as a gold medalist. Originally from Bhopal, the beautiful capital of Madhya Pradesh, she draws inspiration from the city’s rich cultural heritage and layered storytelling traditions that subtly shape her narrative voice. She writes extensively about fashion, beauty, health, relationships, culture, and food, exploring everything from trending styles and runway moments to wellness routines and mindful living. Passionate about meaningful and candid conversations, she enjoys interviewing celebrities, doctors, designers, and film personalities, diving into discussions on fitness, beauty, mental health, and everything fun in between. With a keen eye for trends and a thoughtful understanding of human behaviour, she brings depth, sensitivity, and authenticity to her stories, ensuring they resonate with a wide and diverse audience. When she’s not working, you’ll usually find her lost in a book, planning her next mountain trek, or mapping out spontaneous travel escapes. She loves discovering new authors, revisiting old favourites, and spending quiet afternoons in museums soaking in art, history, and culture. An avid bird-watching enthusiast, she finds joy in early morning walks, spotting rare birds, and reconnecting with nature. Whether sipping coffee while journaling her thoughts or exploring hidden corners of a new city, she constantly seeks inspiration in everyday moments that often turn into compelling story ideas.Read More
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