Where does fat actually go when you lose weight? The answer is in your breath, and your sweat
To lose weight, most of us know that it is a matter of eating less and being more physically active. By putting our bodies into a calorie deficit, we "burn" more calories than we're taking in—and so we lose weight.
When individuals lose weight, it is primarily due to a calorie deficit, which forces the body to burn more calories than consumed. This process primarily leads to the loss of body fat, which was previously stored in foods consumed and later broken down into fatty acids by the digestive system. The majority of stored fat exists in two forms: subcutaneous fat located under the skin, and visceral fat situated deeper within the body, including around organs.
Fat stored in fat cells (adipocytes) is released during periods of metabolic stress, such as calorie restriction. Fat cells receive signals from neurotransmitters and hormones to initiate lipolysis, breaking down triglycerides into fatty acids. Fatty acids enter cells' mitochondria, where they are oxidized through beta-oxidation, releasing carbon dioxide as a byproduct.
The carbon dioxide is then exhaled from the lungs, while a smaller fraction of weight loss is due to water loss through sweat, urine, and other bodily fluids. The precise proportions of fat, carbon dioxide, and water exhaled during weight loss are challenging to measure accurately due to the complexity of monitoring all human outputs over time.
In summary, metabolic stress from diet, exercise, or a combination of both can enhance fat burning to provide energy. To lose weight, individuals should aim to consume fewer calories and prioritize healthy foods, while exercise can further aid in fat loss and improve muscle mass.
Written by urgent.news from Medical Xpress's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
