A Bite-Size Read for Your Health and Waistline
This will probably surprise you. From November 1944 to October 1950, the University of Minnesota conducted a clinical study known as the Minnesota Starvation Experiment. And yes, I know what you’re thinking: this study is old. Even though it happened nearly 80 years ago, however, the findings are still incredibly relevant, especially now when so many people are prioritizing healthy living and starting their own weight loss journeys.
The researchers were studying the psychology and physical effects of semi-starvation, along with how to re-feed people who had been starved during World War II. They wanted to understand both the mental and physical toll of extreme restriction, and how to safely help someone recover from it.
The study included 36 men selected from more than 200 volunteers. Each participant had to lose 25 percent of their body weight. For the first three months, they ate what was considered a normal diet at the time, which was 3,200 calories per day. Take that in for a second. The “normal” diet in the 1940s was 3,200 calories. Then came six months of semi-starvation, which meant eating just 1,570 calories per day. That amount was split between breakfast and lunch. Sound familiar? This part reminded me a lot of today’s popular fasting protocols, where people skip meals and try to function on minimal food.
And just like people trying to focus on healthy living today, they weren’t just sitting around. They worked 15 hours a week in a lab, walked 22 miles each week, and completed 25 hours of educational activities. So essentially, they kept up regular life while being restricted to what we now think of as a “weight loss” calorie count.
Here’s where it gets intense. Physically, they experienced dramatic changes. They looked gaunt, lost strength and stamina, had drops in body temperature and heart rate, lost sex drive, and developed anemia. They experienced swelling in their legs, low blood pressure, dizziness, fainting, frequent urination, constipation, reduced red and white blood cells, thinning hair, brittle nails, and rough, dry skin. Some even reported ringing in their ears.
Mentally and emotionally, things got worse. They became obsessed with food, dreaming, fantasizing, and talking about it constantly. Increased awareness of body functions like urination and drastic mood changes followed. They felt exhausted, irritable, anxious, and depressed, and many felt apathetic and disconnected from themselves. They had concerns about their body image and noticed a drop in mental sharpness. But that drop wasn’t always measurable. The change was more about what they believed about themselves than what a test could show.
There was one participant who accidentally — or maybe not — chopped off three of his fingers while chopping wood, which was part of their routine activity. When asked if he had done it on purpose, he said he didn’t know. He couldn’t say for sure if he had meant to or not. Three men broke the diet, so their results weren’t included, and one man was removed for not hitting the 25 percent weight loss goal.
This study is why I keep talking about the dangers of extreme dieting today. So many people are working toward physical wellness or trying to live a healthier lifestyle. And let’s be honest, the standard advice is still to eat less and move more. Medical weight loss methods are more common now, too. Medications like Ozempic and Wegovy are everywhere. They may be less invasive than surgery, but they are still creating similar effects in many people.
Now let’s go back to those numbers. If you’ve read my blog or listened to my podcast, you know I’m not a fan of counting calories as the sole tool for weight loss. The quality of your calories matters more than the quantity. That said, looking at this study helps us compare things. The men were eating around 1,500 calories per day. And today, how often do we see weight loss plans recommending 1,200 calories per day? Some even recommend 1,000. And some people use those numbers not just to lose weight, but to maintain it.
We should also remember that all of the study participants were men. When we bring female physiology into the mix, things get even more complicated. Women’s bodies are built for reproduction and have cyclical hormone changes that make extreme restriction even more damaging. Full disclosure here, I’ve seen all of these same side effects in my clients who had lap-band surgery or other bariatric procedures. I’ve seen it just as much in clients using GLP-1 medications like Ozempic and Wegovy. The fatigue. The hair loss. The mood changes. The apathy. The obsession with food.
While these men lost 25 percent of their body weight, they also lost joy, energy, motivation, and connection. That’s not healthy living. That’s not physical wellness.
The Minnesota Starvation Experiment serves as a powerful reminder that our mental health and physical health are deeply connected. What we eat and how we eat it matters. How we pursue weight loss matters.
Your health journey should support your life, mind, and body. You are not here to suffer through every day just to weigh less. Choose methods that fuel you and help you feel whole, because you are absolutely worth it.