GITNUXREPORT 2025

Diet Industry Statistics

Global diet industry exceeds $192 billion, yet long-term success remains elusive.

Jannik Linder

Co-Founder of Gitnux, specialized in content and tech since 2016.

First published: April 29, 2025

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Statistic 1

In the United States, about 60% of adults have tried to lose weight in the past year

Statistic 2

The average American woman spends approximately 67 days dieting each year

Statistic 3

statistic:- 90% of women and 70% of men in the US have attempted to lose weight at some point

Statistic 4

Around 40% of Americans who try dieting use commercial weight loss programs

Statistic 5

Nearly 15% of American adults are on some type of diet at any given time

Statistic 6

Approximately 20-25% of American women are on a diet at any given time

Statistic 7

Women are more likely than men to be on a diet, comprising about 80% of dieters

Statistic 8

The top reasons for dieting include weight loss (80%) and health issues (15%)

Statistic 9

Nearly 30% of American adults are actively trying to lose weight using various methods

Statistic 10

The most popular dieting methods include low-carb, low-fat, and calorie counting

Statistic 11

More than 50% of Americans attempting to lose weight report using fad diets

Statistic 12

The average time spent on dieting per year is approximately 81 days

Statistic 13

Approximately 44% of Americans attempt to lose weight by reducing caloric intake

Statistic 14

About 25% of dieters report using online weight loss programs or support groups

Statistic 15

The "clean eating" diet trend peaked around 2014 and involves avoiding processed foods entirely

Statistic 16

The use of meal replacement shakes increased globally by approximately 70% during the COVID-19 pandemic

Statistic 17

The average American spends about 19 hours per week on dieting activities

Statistic 18

The Mediterranean diet is among the top-rated for health benefits and has seen a 20% increase in popularity over the past five years

Statistic 19

The "juice cleanse" diet trend experienced a resurgence in popularity in 2020, with sales increasing by 22%

Statistic 20

The popularity of intermittent fasting diets increased by over 50% from 2019 to 2023

Statistic 21

In 2020, approximately 17% of Americans reported attempting to follow a plant-based or vegan diet

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The global weight loss and diet management market was valued at approximately $192.2 billion in 2019

Statistic 23

The diet industry in the U.S. generates over $70 billion annually

Statistic 24

About 45 million Americans are on a diet at any given time

Statistic 25

The diet food market is valued at over $12 billion worldwide

Statistic 26

The average American spends about $155 annually on weight-loss products

Statistic 27

The number of fitness and weight-loss app downloads increased by over 70% during the COVID-19 pandemic

Statistic 28

The most popular diet book series, "The Zone," sold over 3 million copies worldwide

Statistic 29

The ketogenic diet market was valued at over $9.2 billion in 2020

Statistic 30

Globally, the weight loss industry is projected to reach $295 billion by 2027

Statistic 31

The dieting industry spends approximately $2 billion annually on advertising

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The average cost of a popular commercial diet plan is around $250 per month

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The global industry for dietary supplements linked to weight loss is valued at over $6 billion

Statistic 34

The interval fasting market alone is projected to reach over $11 billion by 2024

Statistic 35

The fast food diet industry generated $614 billion globally in 2018

Statistic 36

The number of diet pills sold in the US exceeds 30 million annually

Statistic 37

The Atkins diet, one of the most popular low-carb diets, was estimated to generate over $10 billion in sales annually

Statistic 38

The US market for herbal and natural weight loss supplements was valued at over $200 million in 2019

Statistic 39

The average cost of weight loss surgery (bariatric surgery) in the US ranges from $15,000 to $26,000

Statistic 40

The global market for diet soda was valued at approximately $16.2 billion in 2020

Statistic 41

Approximately 80% of people who go on a diet regain the weight within one year

Statistic 42

The success rate of commercial weight loss programs is approximately 20%

Statistic 43

Over 95% of dieters regain lost weight within three to five years

Statistic 44

Only about 5-10% of diets are successful long-term, according to research

Statistic 45

About 70% of people who start a diet drop out within the first six months

Statistic 46

55% of dieters report they feel more motivated when they see rapid initial results

Statistic 47

Approximately 15% of dieters experience disordered eating patterns as a result of dieting behaviors

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Key Highlights

The global weight loss and diet management market was valued at approximately $192.2 billion in 2019
In the United States, about 60% of adults have tried to lose weight in the past year
Approximately 80% of people who go on a diet regain the weight within one year
The diet industry in the U.S. generates over $70 billion annually
About 45 million Americans are on a diet at any given time
The average American woman spends approximately 67 days dieting each year
The most popular dieting methods include low-carb, low-fat, and calorie counting
The diet food market is valued at over $12 billion worldwide
statistic:- 90% of women and 70% of men in the US have attempted to lose weight at some point
The average American spends about $155 annually on weight-loss products
The number of fitness and weight-loss app downloads increased by over 70% during the COVID-19 pandemic
Around 40% of Americans who try dieting use commercial weight loss programs
The success rate of commercial weight loss programs is approximately 20%

With the global weight loss industry skyrocketing to an estimated $295 billion by 2027 and nearly 80% of dieters regaining their lost weight within a year, it’s clear that the diet industry is a lucrative yet challenging landscape for those seeking sustainable health transformations.

Demographics and Consumer Behavior

In the United States, about 60% of adults have tried to lose weight in the past year
The average American woman spends approximately 67 days dieting each year
statistic:- 90% of women and 70% of men in the US have attempted to lose weight at some point
Around 40% of Americans who try dieting use commercial weight loss programs
Nearly 15% of American adults are on some type of diet at any given time
Approximately 20-25% of American women are on a diet at any given time
Women are more likely than men to be on a diet, comprising about 80% of dieters
The top reasons for dieting include weight loss (80%) and health issues (15%)
Nearly 30% of American adults are actively trying to lose weight using various methods

Demographics and Consumer Behavior Interpretation

With nearly 60% of Americans attempting to shed pounds annually—spending an average of 67 days dieting—it's clear that the nation's obsession with weight loss is less about health and more about an enduring cultural fixation, leaving many caught in a never-ending cycle of dieting that's as prevalent among women as it is persistent.

Dieting Trends and Popular Methods

The most popular dieting methods include low-carb, low-fat, and calorie counting
More than 50% of Americans attempting to lose weight report using fad diets
The average time spent on dieting per year is approximately 81 days
Approximately 44% of Americans attempt to lose weight by reducing caloric intake
About 25% of dieters report using online weight loss programs or support groups
The "clean eating" diet trend peaked around 2014 and involves avoiding processed foods entirely
The use of meal replacement shakes increased globally by approximately 70% during the COVID-19 pandemic
The average American spends about 19 hours per week on dieting activities
The Mediterranean diet is among the top-rated for health benefits and has seen a 20% increase in popularity over the past five years
The "juice cleanse" diet trend experienced a resurgence in popularity in 2020, with sales increasing by 22%
The popularity of intermittent fasting diets increased by over 50% from 2019 to 2023
In 2020, approximately 17% of Americans reported attempting to follow a plant-based or vegan diet

Dieting Trends and Popular Methods Interpretation

Despite spending nearly a month each year dieting, Americans continue to oscillate between fad diets, online support, and trending cleanses—highlighting that in the quest for health, consistency remains the ultimate diet myth.

Market Size and Industry Revenue

The global weight loss and diet management market was valued at approximately $192.2 billion in 2019
The diet industry in the U.S. generates over $70 billion annually
About 45 million Americans are on a diet at any given time
The diet food market is valued at over $12 billion worldwide
The average American spends about $155 annually on weight-loss products
The number of fitness and weight-loss app downloads increased by over 70% during the COVID-19 pandemic
The most popular diet book series, "The Zone," sold over 3 million copies worldwide
The ketogenic diet market was valued at over $9.2 billion in 2020
Globally, the weight loss industry is projected to reach $295 billion by 2027
The dieting industry spends approximately $2 billion annually on advertising
The average cost of a popular commercial diet plan is around $250 per month
The global industry for dietary supplements linked to weight loss is valued at over $6 billion
The interval fasting market alone is projected to reach over $11 billion by 2024
The fast food diet industry generated $614 billion globally in 2018
The number of diet pills sold in the US exceeds 30 million annually
The Atkins diet, one of the most popular low-carb diets, was estimated to generate over $10 billion in sales annually
The US market for herbal and natural weight loss supplements was valued at over $200 million in 2019
The average cost of weight loss surgery (bariatric surgery) in the US ranges from $15,000 to $26,000
The global market for diet soda was valued at approximately $16.2 billion in 2020

Market Size and Industry Revenue Interpretation

With the diet industry, it's clear that while billions are spent worldwide—ranging from $12 billion on diet foods to $295 billion projected by 2027—many people are still searching for the elusive secret to weight loss, proving that sometimes, the best investment is just in asking more questions.

Success Rates and Challenges in Weight Loss

Approximately 80% of people who go on a diet regain the weight within one year
The success rate of commercial weight loss programs is approximately 20%
Over 95% of dieters regain lost weight within three to five years
Only about 5-10% of diets are successful long-term, according to research
About 70% of people who start a diet drop out within the first six months
55% of dieters report they feel more motivated when they see rapid initial results
Approximately 15% of dieters experience disordered eating patterns as a result of dieting behaviors

Success Rates and Challenges in Weight Loss Interpretation

With over 80% of dieters regaining lost weight within a year and only a slender 5-10% achieving long-term success, it's clear that the diet industry’s promise of quick fixes often leaves us with more than just misplaced hope—sometimes, it’s a path to disordered eating and lost confidence.