64 Interesting Facts about Weight Loss

By Karin Lehnardt, Senior Writer

Published January 9, 2017Updated May 30, 2025

During the 19th century, a diet called “Fletcherism” became popular. Introduced by American Horace Fletcher (“the Great Masticator”), the diet promoted chewing a mouthful of food at least 32 times or until it was turned into liquid. He argued his method of eating could help people avoid disease and lose weight._[17]
Elvis Presley was famously a fan of the “Sleeping Beauty Diet,” or a diet where a person is sedated for days at time. The reasoning behind the diet was that a sleeping person wouldn’t eat._[17]
Losing weight alters brain activity. For example, after following a weight loss program for 6 months, women scored better on memory tests. Research has also linked obesity to poor memory, especially in overweight pear-shaped women._[8]
Obesity has been linked to several types of cancer. Specifically, being overweight causes inflammation that causes cell changes in the body. However, just by losing 5% of your body weight can significantly lower dangerous levels of inflammation._[5]
After undergoing bariatric surgery, approximately 87% of patients said their taste buds had changed. Almost half of them said food didn’t taste as good, so they didn’t eat as much. Additionally, people had less of a preference for salty foods._[9]
Losing weight can reduce arthritis symptoms._[5]
Eating dark chocolate in moderate amounts is associated with lower levels of abdominal fat. Scientists speculate that the antioxidants may help fight inflammation and improve metabolic functioning._[16]
In the first half of the 20th century, cigarette makers regularly touted their products as a weight loss aid. One 1929 advertisement proclaimed, “Light a Lucky and you’ll never miss a sweet that makes you fat.”_[17]

Lord Byron was one of first diet icons

The “Byron Diet” is named after Victorian poet Lord Byron who would eat bizarre foods such as potatoes drenched in vinegar in an effort to look fashionably thin and pale._[17]
Stress can make it difficult to lose weight. Stress can trigger cravings for carb-rich snack foods which tend to calm stress hormones. Stress hormones can also increase fat storage. In addition to physical exercise, relaxation techniques can help control weight._[1]
Sleep deprivation can make it harder to lose weight. Inadequate sleep upsets a person’s hormone balance, which decreases leptin (a hormone that makes a person feel full) and increases ghrelin (which triggers hunger). Scientists argue that getting enough sleep is the cheapest and easiest obesity medicine there is._[1]
While weight loss pills may help a person lose weight temporarily, they can cause other negative side effects, such as severe mood swings and depression._[3]
Researchers note that having sex within a committed, healthy relationship can aid in weight loss, though it shouldn’t replace one’s daily workout. On average, sex burns 150–250 calories per half hour and helps decrease stress._[13]
According to one study, using red plates helps people eat less. Researchers believe that the color red is associated with stopping and caution, which subconsciously encourages people to be more aware of what they are eating and how often._[16]
According to the journal Obesity, paying for meals with cash increases the likelihood someone will buy more healthful food._[16]

Artificial sweeteners can confuse the body into storing fat

Research shows that consuming artificial sweeteners actually promotes weight gain. After only one week of ingesting artificial sweeteners, healthy subjects showed symptoms of glucose intolerance and a change in gut bacteria._[19]
The temperature in a person’s bedroom may help boost weight loss efforts. According to the National Institute of Health Clinical Center, people who slept in a 66° F room burned 7% calories while sleeping than those who slept in a warmer room. Colder sleepers burned more calories likely because their bodies were working harder to maintain a stable body temperature of 98.6°._[11]
Parents who ate with their family while sitting around a kitchen or dining room table weigh significantly less than those who eat dinner in front of the TV. Additionally, parents who stayed at the table until everyone was finished and had meaningful conversations also weighed less._[7]
Obese pregnant women have more glucose and free fatty acids floating in the womb than normal-weight pregnant women, which can increase the risk of their children becoming obese later in life. Additionally, unhealthy, fatty foods affected the developing metabolic systems in a fetus’ brain._[1]
Energy levels typically skyrocket after losing unwanted weight because carrying less weight means using less energy to simply get through day. Additionally, weight loss improves oxygen efficiency, which leads to less huffing and puffing._[8]

Energy levels typically skyrocket after losing unwanted weight

Sitting at desk burns 83 calories per hour. Standing at desk burns 115 calories per hour. Riding an elevator burns 128 calories an hour. Taking the stairs burns 509._[21]
Watching TV burns 64 calories an hour. Making out burns 96._[21]
Night owls may be more likely to pack on the pounds than early birds. Studies find that people who go to bed late eat more food, have worse diets, and are more likely to have a higher body mass index (BMI) than those who go to bed earlier._[11]
Studies show that those who travel most for work have a harder time losing weight and tend to have a greater risk of obesity._[11]
Muscle uses more calories to maintain itself than any other body tissue. For every pound of muscle someone puts on, they automatically burn an extra 22 to 36 more calories a day. Muscle burns more calories than fat, even at rest._[11]
An Ohio State University study found that women who reported stress in the previous 24 hours burned 104 calories fewer than nonstressed women after a high-fat meal._[11]
Each daily can of diet soda increases a person’s risk of obesity by 41%._[11]
Eating less sugar is linked with weight loss, and eating more promotes weight gain. The average American eats 61 pounds of refined sugar each year, including 25 pounds of candy. Halloween accounts for 2 pounds of that._[15]
Globally there are over 1 billion overweight adults._[20]
In 2012, Americans spent over $60 billion per year dieting. This is up from $58.6 billion in 2008._[20]
Approximately 50% of American adults are dieting at any given moment._[20]
An average, size-10, slim female carries about 100,000 calories of fat on her body, which is about 54 packs of butter._[22]
An average adult has about 50 billion fat cells, which means there are more fat cells in one person than there are people on earth._[22]
Healthy nutrition and exercise do not make fat cells disappear. Instead, fat cells become like deflated balloons, waiting to be refilled again._[10]
Fat cells exist in all parts of the body except in the eyelids, parts of the esophagus, the groin, and the penis. Each fat cell can expand up to 10 times its normal size._[22]
Some people have twice as many fat cells as other people. Additionally, the cells of overweight and obese people hold more fat. While a person can’t reduce their total number of fat cells, they can eat right and exercise to keep the cells small. New fat cells emerge during childhood and typically stop by adolescence._[1]

As an adult, the number of fat cells remain the same; they just change volume as we gain or lose weight

Female breasts are almost made up entirely of fat. This is why breasts tend to reduce in size before other parts of the body with weight loss._[22]
One pound of fat equals 3,500 calories._[22]
Researchers note that Americans eat for lots of reason, but usually not because of hunger. They eat because of family, friends, packages, plates, names, numbers, labels, lights, colors, candles, shapes, smells, and containers and a myriad of other “food cues.”_[14]
Someone who has soda readily available and in sight at home weighs on average 25 pounds more than someone who doesn’t._[14]
When subjects were shown pictures of food they like, the parts of the brain that lit up were the same parts that were activated in drug addicts. Studies show that obese peoples may have fewer dopamine receptors, which means they need more food to get that pleasurable reaction._[1]

Eating crappy food isn't a reward -- it's a punishment.

- Drew Carey

Researchers noted that keeping serving dishes off the table reduced the amount of food men ate by 29%._[14]
Google did an experiment with M&Ms at their headquarters. When they put the candy in containers instead of out in the open, people ate 3 million fewer pieces within one month’s time._[14]
Posting photos of low-calorie foods on the fridge may help in weight loss. Pictures act as subtle reminder of a person’s weight loss goals. Researchers also suggest making the background on a smartphone a low-cal food._[16]
Shopping while hungry makes people not only buy more food, it also makes them buy more junk food._[14]
Study participants who scored in the top 10% on impulsivity weighed an average of 22 pounds more than those in the bottom 10%._[14]
Regularly smelling peppermint may help decrease hunger and, consequently, caloric intake. Researchers believe the strong scent is distracting and helps keeps a person’s mind off of their appetite._[1]

Certain scents, including peppermint, can help control appetite and cravings

People are increasingly using AI to lose weight and to keep it off. AI can customize meal plans, exercises routines, sleep data, and stress levels to create an optimal and long-term weight-loss plan._[18]
Ultra-Processed foods are linked to visceral (belly) fat._[4]
Standing burns significantly more calories than sitting. Switching to a standing desk could burn 8-10 extra pounds of fat per year._[21]
Medications, such as Semaglutide (Ozempic, Wegovy) and tirzeptide mimic GLP-1's effects, which is reducing appetite and increasing feelings of fullness. The intestines naturally produce GLP-1 while eating._[2]
On average, if someone eats with one other person, they will eat about 35% more than if eating alone. If someone eats with a group of seven or more, they’ll eat nearly twice as much, or 96% more than if they were eating alone._[14]
GLP-1 slows how fast food leaves the stomach, which prolongs feeling full. It also stimulates insulin release after meals, which helps control blood sugar and reduce fat accumulation. Additionally, it represses glucagon, a hormone that increases glucose production, which, in turn, lowers blood levels._[2]
GLP-1s not only aid in weight loss, but they also improve blood pressure, cholesterol levels, and reduce inflammation._[2]
Greek physician and philosopher Galen explained 2,000 years ago that “bad humors” were the cause of obesity. He prescribed massages, baths, and “slimming foods” such as greens, garlic, and wild game as a way to lose weight._[12]
Weight loss drugs first entered mainstream markets during the 1920s. Physicians would prescribe thyroid medication to healthy people to help them lose weight._[12]
The word “obese” is from the Latin obesus, or “having eaten until fat.”_[5]
In the 1970s and 1980s, “jaw wiring” gained traction as a treatment for obesity._[12]
Eating cake without feeling guilty can help with weight loss. People who viewed eating cake as a celebration are more successful at losing weight than those who associate cake with guilt. The key is to indulge strategically._[6]
In 1949, a small group of physicians created the National Obesity Society, with the aim of raising awareness of obesity. The group encouraged the public to view weight loss as a disease to be treated by a professional._[12]
One of the early treatments for obesity, stereotactic surgery (e.g., psychosurgery) involved burning lesions into the hypothalamuses of people with “gross” obesity._[12]

Liposuction also won’t get rid of cellulite

Liposuction removes only the fat that lies directly underneath the skin. The most fat that can be removed safely is 2–3 pounds. Lipo cannot remove intra-abdominal fat that is associated with heart disease and diabetes._[10]
Approximately 97% of dieters regain everything they lost and then some within three years._[20]
In 2000, about 37,000 bariatric surgeries were performed in the U.S. In 2013, the numbers had risen to 220,000._[20]