METABOLISM is often blamed for weight gain, praised for effortless weight loss and surrounded by countless misconceptions. Many people believe that a “slow metabolism” is the main reason they struggle to lose weight, while others search for miracle foods or supplements that promise to “boost” their metabolism overnight.

“In reality, metabolism is a complex process influenced by factors such as age, genetics, body composition, physical activity and overall health,” said workout developer Mesha Gaye Wright. “Understanding how metabolism actually works can help people make informed decisions and avoid common fitness myths.”

She explained that metabolism refers to all the chemical processes that occur in the body to convert food into energy. This energy powers essential functions such as breathing, circulating blood, repairing cells, regulating body temperature, and supporting physical activity.

Wright explains some of the most widespread metabolism myths and the facts behind them.

Myth 1: A slow metabolism is the main cause of weight gain

Many people assume they gain weight because they have a naturally slow metabolism. While metabolic rates do vary, the differences between most healthy individuals are relatively small. Weight gain usually occurs when calorie intake consistently exceeds calorie expenditure. Lifestyle habits, diet, sleep and physical activity generally have a much greater impact than metabolism alone.

Myth 2: Certain foods dramatically boost metabolism

Spicy foods, green tea, coffee and certain supplements are often promoted as metabolism boosters. Although some may slightly increase calorie burning for a short period, the effect is modest and temporary. No single food can significantly increase metabolism or replace healthy eating and regular exercise.

Myth 3: Eating small meals every few hours speeds up metabolism

A common belief is that eating frequently keeps the metabolism constantly active. However, research shows that meal frequency has little effect on the total number of calories burned during digestion. What matters more is the total amount and quality of food consumed throughout the day rather than how often meals are eaten.

Myth 4: Metabolism stops slowing after youth

Many people believe metabolism suddenly slows after turning 30. While metabolism can gradually decline with age, much of this change is related to the loss of muscle mass and reduced physical activity. Strength training and staying active can help maintain muscle and support a healthy metabolic rate as you age.

Myth 5: Thin people always have faster metabolisms

It may seem logical that naturally thin people burn calories much faster, but this is not always true. People with larger bodies often burn more calories at rest because maintaining a larger body requires more energy. Body composition, especially muscle mass, influences metabolism more than body size alone.

Myth 6: Crash diets permanently damage metabolism

Very low-calorie diets can temporarily slow metabolism as the body adapts to reduced energy intake. However, this effect is usually reversible. Returning to a balanced diet, maintaining muscle through resistance training, and gradually increasing calorie intake can help restore normal metabolic function.

“Although you cannot completely control your metabolism, healthy lifestyle habits can support efficient energy use,” Wright said.

She encourages people to stay physically active throughout the day, eat enough protein to support muscle maintenance, avoid extreme dieting and focus on balanced nutrition.

“Many popular beliefs about metabolism are exaggerated or unsupported by scientific evidence,” Wright said. “Rather than searching for quick fixes or miracle metabolism boosters, focusing on consistent exercise, nutritious eating, adequate sleep and healthy daily habits is the most effective approach to managing body weight and improving overall health.”