No, your fat doesn't get lose in sweat when you lose weight. Doctor reveals the organ with the most important role in weight loss: ' 84% of your lost fat is...'

The fat that we lose, doesn’t just disappear into the aether or dissolve into nothingness. Taking to X, internal medicine expert Dr Priyam Bordoloi asked followers to guess where the 10 kg of fat that you lose, would ‘go’. “If you lose 10 kg of fat, where does that mass actually go?

(99% of you will definitely get it wrong)

A) It turns into pure energy

B) You sweat it out
C) You excrete it
D) You breathe it out.”

The Answer May Shock You

Dr Bordoloi revealed that you breath out the fat. Yes, you read that right!

He then went on to explain how people wrongly assume that body fat simply disappears by being transformed entirely into energy or heat. In reality, the body must obey the Law of Conservation of Mass, which means the physical matter making up fat cannot vanish. While energy is produced during metabolism, it has no mass, so the fat itself must be converted into other substances that leave the body.

Body fat is mainly stored in the form of triglycerides, molecules composed of carbon, hydrogen, and oxygen atoms. When a person consumes fewer calories than they burn, the body begins using these fat reserves for energy. During this metabolic process, known as oxidation, triglycerides are broken down through a series of chemical reactions. Instead of disappearing, the fat is transformed into carbon dioxide and water.

The numbers behind this process are remarkably accurate. If someone loses 10 kilograms of body fat, around 8.4 kilograms are converted into carbon dioxide. This carbon dioxide enters the bloodstream, travels to the lungs, and is expelled from the body every time a person breathes out. The remaining 1.6 kilograms become water, which circulates through the body before being eliminated through urine, perspiration, and moisture released in the breath.

This means that the majority of fat loss does not leave the body through sweat or as pure energy. Approximately 84 percent of the fat that is broken down exits the body as carbon dioxide, making breathing the primary route through which the physical mass of fat is removed. The remaining 16 percent is excreted as water through various bodily fluids.

Although exercise and physical activity increase breathing rate and can temporarily raise the amount of carbon dioxide exhaled, lasting fat loss still depends on maintaining a calorie deficit over time. Ultimately, the lungs play a far more significant role in eliminating body fat than many people realize, serving as the body's main pathway for removing the byproducts of fat metabolism.

"Your lungs are the primary excretory organ for weight loss!" said Dr Bordoloi.