Who has lost the most weight ever?

Who has lost the most weight ever? The answer depends on whether you count the largest single recorded drop or the biggest total transformation over a lifetime. Both records involve weight loss that most people would struggle to even imagine, and both tell us something real about what the human body can survive.

The verified record for the most weight lost by a single person belongs to Khalid bin Mohsen Shaari from Saudi Arabia. He dropped from 610 kg down to around 63 kg. That is a loss of roughly 542 kg (about 1,195 lbs). Before him, the documented record belonged to Jon Brower Minnoch, an American who lost 419 kg (924 lbs) during a two year hospital stay. And the female record belongs to Rosalie Bradford, who lost 416 kg (917 lbs) over five and a half years of dieting.

These three stories form the core of this topic. Each one followed a different path and hit different outcomes.

Who holds the record for the most weight lost?

Khalid bin Mohsen Shaari holds the current record. At his peak, Shaari weighed 610 kg (1,345 lbs), making him one of the heaviest people ever recorded. He spent three full years stuck in bed, unable to move or leave his home. In 2013, he put out a public plea for help, and King Abdullah of Saudi Arabia responded directly.

The King funded a full medical intervention. A team of 30 medical staff used a forklift to transport Shaari from his home to King Fahd Medical City in Riyadh. His treatment plan included gastric bypass surgery, a strict diet program, regular exercise, physiotherapy, and multiple surgeries to remove excess skin.

Shaari eventually dropped to around 63 kg. That total loss of roughly 542 kg makes his transformation the largest documented weight loss in history. His medical team nicknamed him “the smiling man” because of his positive attitude through the entire process.

What happened to Jon Brower Minnoch?

Jon Brower Minnoch held the record for decades before Shaari. Born in 1941 on Bainbridge Island, Washington, Minnoch struggled with his weight from childhood. By age 12, he already weighed 133 kg (294 lbs). By his early twenties, he was close to 180 kg (400 lbs).

At his peak in March 1978, doctors estimated his weight at 635 kg (1,400 lbs). That made him the heaviest person ever recorded, and no one has broken that record since. Much of his weight came from massive edema, which is an extreme buildup of fluid in the body caused by congestive heart failure. His doctors believed he carried over 400 kg of excess fluid alone.

Getting Minnoch to the hospital required firefighters to remove a window from his home and use plywood as a stretcher. He stayed in the hospital for two years on a strict 1,200 calorie per day diet. By the time he left, he weighed 216 kg (476 lbs), a loss of 419 kg (924 lbs). That was the largest documented weight loss in history at the time.

Minnoch’s friends and neighbours described him as warm, funny, and a good family man. He drove a water taxi service with his wife for 17 years and never saw himself as limited by his size. His wife Jean weighed just 50 kg (110 lbs), and their weight difference actually set its own Guinness World Record.

Did Jon Brower Minnoch keep the weight off?

No. And this is the part of his story that matters most for anyone trying to understand extreme weight loss.

After Minnoch left the hospital in 1980, he regained weight rapidly. Just over a year later, in October 1981, he was readmitted at 432 kg (952 lbs). During one particularly bad stretch, he gained 91 kg (200 lbs) in a single week due to fluid retention.

Minnoch spent another year in the hospital. His weight went up and down dramatically over the next few years. He died on September 4, 1983, at just 41 years old. He weighed 362 kg (798 lbs) at the time of his death. The cause was cardiac arrest with respiratory failure.

His plywood casket required two cemetery plots, and about a dozen men carried it.

Who holds the female record for most weight lost?

Rosalie Bradford from Florida holds the female record. According to the 1994 Guinness Book of Records, Bradford weighed 476 kg (1,050 lbs) in January 1987. Her own website claimed her peak weight was closer to 544 kg (1,200 lbs), though that higher number was never officially verified.

Bradford spent about eight years unable to leave her bed. She struggled with what she openly called a food addiction. In a 1999 interview with The Ledger, she said “I was just like an addict. Lie, cheat, steal, whatever to get my drug of choice. And my drug of choice was food.”

Her turnaround started when fitness personality Richard Simmons called her on the phone and encouraged her to try a 1,200 calorie diet. She dieted for almost two years before she stepped on a scale, using a truck scale because no regular scale could hold her. In a later interview she said that knowing someone believed she could lose weight gave her the motivation to start.

Over five and a half years, Bradford dropped to around 128 kg (283 lbs). Guinness recorded her official loss at 334 kg (736 lbs), measured from 476 kg down to 143 kg (314 lbs) by September 1992. She also underwent several surgeries to remove excess skin from her arms, legs, and sides, and spent a year and a half in therapy.

Bradford died in November 2006 at age 63.

How much weight can a person safely lose per week?

Most doctors and researchers agree that losing 0.5 to 1 kg (about 1 to 2 lbs) per week is a safe and sustainable rate for most people. That works out to roughly 0.5% to 1% of total body weight per week.

Going faster than that tends to backfire. Research shows that aggressive calorie cuts cause your resting metabolic rate to drop. Your body burns fewer calories at rest, makes you hungrier, and fights harder to hold onto fat stores. A massive 2022 study published in Science on over 6,000 people showed that individual metabolic rates vary enormously. Two people at the same body weight could burn anywhere from 1,400 to 5,700 calories per day, which means the right rate of loss looks different for everyone.

For people with a significant amount of weight to lose (like those in the extreme cases above), doctors sometimes allow faster initial loss under close medical supervision. The key word there is supervision. Minnoch, Shaari, and Bradford all had full medical teams tracking their progress every day.

What methods actually work for long term weight loss?

The research here is clear. The specific diet matters less than whether you can stick to it.

Multiple meta analyses have compared popular diets head to head, including low carb, low fat, intermittent fasting, and calorie tracking. When researchers matched the diets for total calories and protein, there was basically no difference in fat loss between them. But when they sorted people by how well they stuck to whatever plan they chose, adherence predicted success in a straight line. The people who stuck with their plan lost the most weight, regardless of which plan it was.

This matches what researchers found in studies of successful long term weight loss maintainers. Over 70% of people who lose weight and keep it off for several years exercise regularly. Fewer than 30% of people who regain their weight exercise at all. Regular self monitoring (like daily weigh ins averaged over a week) also shows up again and again as a predictor of success.

One large study on people who kept weight off for three years or more found something interesting. The maintainers almost all said the same thing. They had to develop a completely new identity. They could not keep their old habits and expect the weight to stay off.

Why do most people regain weight after losing it?

Six out of every seven obese people will lose a significant amount of body weight at some point in their lives. So the problem is not losing weight. The problem is keeping it off.

Research points to several reasons for this.

1. When you lose weight, your body’s resting metabolic rate drops. One study found that even a 10% reduction in body weight caused non exercise activity (called NEAT) to drop by nearly 500 calories per day. Your body moves less without you even noticing.
2. Hormones fight back. Levels of leptin (the hormone that tells you you are full) decrease, and levels of ghrelin (the hormone that makes you hungry) increase. This makes you hungrier than you were before the diet, even after you have reached a normal weight.
3. People treat weight loss like a temporary project. They go on a diet, lose 15 kg, then go back to every old habit. The weight returns, sometimes with interest.
4. The psychological side gets ignored. People who struggle with emotional eating, food addiction, or disordered eating patterns face a unique challenge. Bradford put it best when she compared food addiction to drug addiction, except “you can never abstain from food.”

How much does professional weight loss help cost?

Costs vary widely depending on the approach.

1. Gym memberships in Australia typically run from $15 AUD to $90 AUD per month depending on the facility
2. Personal training sessions average $60 AUD to $100 AUD per session
3. Dietitian consultations usually cost $100 AUD to $200 AUD per visit, though Medicare rebates can apply with a GP referral
4. Gastric bypass surgery ranges from $15,000 AUD to $25,000 AUD in Australia as a private patient
5. Gastric sleeve surgery ranges from $10,000 AUD to $20,000 AUD
6. Weight loss medications like semaglutide (brand names Ozempic and Wegovy) cost around $130 AUD to $200 AUD per month, though PBS subsidies may apply for eligible patients

The extreme cases in this article all required massive medical interventions funded by either government health systems or (in Shaari’s case) direct royal intervention. These are not typical pathways, but they show what becomes necessary when weight reaches life threatening levels.

What role does exercise play in weight loss?

Exercise alone is not a great tool for losing weight. But it is one of the best tools for keeping weight off and staying healthy regardless of what the scale says.

Research shows that exercise improves insulin sensitivity, reduces inflammation, and improves cardiovascular health even without any change in body weight. A study of Bengali workers from the 1950s found something fascinating. Sedentary workers actually ate more than lightly or moderately active workers. Once people became active, they regulated their appetite much more accurately.

There is also strong evidence that exercise increases your sensitivity to satiety signals. You feel full sooner and more accurately when you move your body regularly.

For fat loss specifically, walking beats intense cardio for most people. A 30 minute walk burns around 100 to 200 calories and adds roughly 3,000 steps to your daily count. The biggest advantage of walking is that it does not spike your appetite the way hard cardio does, and it does not cause the same compensation effect where your body reduces its background activity to offset the workout.

Research on NEAT (non exercise activity thermogenesis) shows that a highly active person can burn up to 2,000 more calories per day than a sedentary person through everyday movements like walking, cooking, fidgeting, and standing. That dwarfs what most people burn in a gym session.

What can we learn from these extreme cases?

The biggest takeaways from the stories of Shaari, Minnoch, and Bradford come down to a few clear patterns.

1. Medical supervision matters at extreme weights. All three required teams of doctors, surgeons, dietitians, and physiotherapists working together. Trying to handle extreme obesity alone is dangerous.
2. Weight loss surgery works as a tool, not a cure. Shaari had gastric bypass and lost an extraordinary amount of weight. But surgery was only part of a bigger plan that included diet, exercise, therapy, and ongoing support.
3. Regain is the real enemy. Minnoch lost 419 kg and gained much of it back within a year. Bradford addressed the psychological roots of her eating and kept most of her weight off. The difference was not willpower. It was whether the underlying causes got addressed.
4. Identity change predicts long term success. Both Bradford and the research on successful maintainers point to the same conclusion. You cannot keep old habits and expect a new body. The people who succeed build a completely new relationship with food, movement, and their own self image.
5. Slow and steady beats fast and dramatic. The sustainable rate of 0.5 to 1% of body weight per week exists for a reason. Crash diets cause metabolic damage and almost always end in regain.

FAQ

What is the most weight anyone has ever lost? Khalid bin Mohsen Shaari lost approximately 542 kg (1,195 lbs), dropping from 610 kg to around 63 kg. This is the largest documented weight loss in history.

Who was the heaviest person ever? Jon Brower Minnoch weighed an estimated 635 kg (1,400 lbs) in 1978. No one has exceeded that recorded weight.

What is the most weight a woman has ever lost? Rosalie Bradford lost approximately 416 kg (917 lbs), documented by Guinness as a drop from 476 kg to 143 kg over five and a half years.

Can you lose 1 kg per day? Not safely. Losing 1 kg of actual body fat per day would require a deficit of about 7,700 calories, which is not possible through diet and exercise alone. Rapid weight drops on the scale are usually water and fluid shifts, not fat loss.

Does weight loss surgery work? Yes, for many people. Bariatric procedures like gastric bypass and gastric sleeve are the most effective interventions for severe obesity. But they work best as part of a complete plan that includes diet changes, exercise, and psychological support. Surgery alone does not fix the habits that caused the weight gain.

What percentage of people keep weight off after losing it? Research suggests that roughly 80% to 85% of people who lose significant weight regain most or all of it within a few years. The 15% to 20% who succeed long term almost all share common habits including regular exercise, daily self monitoring, and fundamental lifestyle changes.

Is walking better than running for fat loss? For most people, yes. Walking burns fewer calories per minute but causes less appetite increase and less compensation (where your body reduces other activity to offset the workout). Studies show that when total work is matched between low intensity and high intensity cardio, there is no significant difference in fat loss. Walking is also easier on the joints and more sustainable long term.

How do you know if your weight is unhealthy? Body mass index (BMI) gives a rough guide, but it does not tell the whole story. Waist circumference, blood pressure, blood sugar levels, and cholesterol numbers give a much better picture of health risk. Talk to your doctor about getting a full health check rather than relying on the scale alone.

Extreme weight loss stories are inspiring, but sustainable results come from smart daily habits — like choosing the best drinks for belly fat loss and pairing them with efficient workouts such as finding out whether 20 minutes of HIIT per day is enough to see real changes. A personal trainer in Brighton can help you achieve lasting results without extreme measures.