Weight loss is a topic that is never out of fashion. Millions of people worldwide try to lose weight, but only a few of them understand the science behind weight loss. Trying to lose weight without understanding how your body reacts to it can lead to disappointment, and you might end up giving up. That’s why we’re here to help. This article discusses the science behind weight loss, where fat goes when we lose weight, and the essential role of a balanced diet and exercise in maintaining weight loss.

Understanding the Science Behind Fat Storage and Release: How Losing Weight Affects Your Body

Fat cells, also called adipocytes, are found under your skin, around your organs, and in your muscles. When you consume food, your body breaks it down into glucose, which is used for energy. The leftover glucose gets stored in your liver and muscles as glycogen. However, if you consume more calories than your body needs, insulin, a hormone produced by the pancreas, signals your body to store the excess energy as fat.

When you lose weight, your fat cells release triglycerides, which are broken down into fatty acids and glycerol. The fatty acids are then used for energy by your muscles and organs. As a result, your fat cells shrink in size, but the total number of fat cells in your body remains the same.

Hormones such as insulin and cortisol play a vital role in fat storage and release. Insulin regulates the levels of glucose in your body and signals your body to store excess calories as fat. In contrast, cortisol is a stress hormone that triggers the breakdown of fat and its release into your bloodstream to use as energy

Debunking the Myth of “Burned” Calories: The Real Explanation of Weight Loss

You may have heard of the term “burned” calories as a way to explain weight loss. However, this term conjures up a misleading image. When you lose weight, the fat cells in your body don’t turn into energy or heat. Instead, the fat molecules break down into carbon dioxide, water, and energy.

Here’s how it works: The fatty acids released from your fat cells enter the bloodstream and are transported to the mitochondria, the powerhouses of your cells. The mitochondria use the fatty acids, along with oxygen, to produce energy. The byproducts of this process are carbon dioxide and water. The water is either used by your body or excreted through urine, sweat, and other bodily fluids. The carbon dioxide is exhaled through your lungs.

A calorie deficit is essential to losing weight, which means you must burn more calories than you consume. A pound of fat contains approximately 3,500 calories, so to lose one pound of fat per week, you need to create a calorie deficit of 500 calories per day. This can be achieved through a combination of diet and exercise.

The Journey of Fat Cells: Tracing the Path of Fat Molecules After Weight Loss

What happens to fat molecules after they’re released from your fat cells? The fat molecules are broken down into their constituent parts – carbon, hydrogen, and oxygen – which are incorporated into molecules your body can use for energy or eliminate as waste products.

The carbon and oxygen from the fat molecules combine with each other in your body to form carbon dioxide, while the hydrogen combines with oxygen to form water. The water is either used by your body or excreted through urine, sweat, and other bodily fluids.

Most of the carbon dioxide produced by the breakdown of fat molecules is exhaled through your lungs. In fact, approximately 84% of the fat you lose is exhaled as carbon dioxide, while the remaining 16% is excreted as water through urine, sweat, and other bodily fluids.

Uncovering the Truth: How Much Fat You Actually Lose Through Urine, Sweat, and Breathing

A study published in the British Medical Journal estimated that for every 10kg of fat you lose, approximately 8.4kg is exhaled as carbon dioxide, and the remaining 1.6kg is excreted as water through urine, sweat, and other bodily fluids.

This may come as a surprise to you since it’s commonly believed that sweating leads to significant weight loss. In reality, sweat is mostly composed of water and electrolytes, such as sodium and potassium. Any weight loss from sweating is mostly from water loss, which is quickly regained when you hydrate.

Urine also contains small amounts of fat, but it mostly consists of water and waste products your body is eliminating. So even if you see your urine is cloudy after losing weight, don’t worry much about it. Just simply drink more water to flush out the remaining unwanted substances from your body.

Beyond Weight Loss: The Importance of a Balanced Diet and Exercise in Maintaining Fat Loss

Losing weight is just one component of a larger plan for overall health. If you want to maintain weight loss over the long term, you need to focus on adopting a healthy lifestyle.

A balanced diet that consists of a variety of whole foods, including fruits, vegetables, whole grains, lean proteins, and healthy fats, can help keep you feeling full and satisfied while providing the essential nutrients your body needs to function properly.

Regular physical activity is also crucial for maintaining weight loss. Exercise helps boost your metabolism, increase muscle mass, and burn calories. It’s essential to find a physical activity that you enjoy and can incorporate into your daily routine, such as walking, running, cycling, or dancing.

To maintain your weight loss, focus on making sustainable lifestyle changes that you can stick to in the long term.

Examining the Risks of Rapid Weight Loss: Why Slow and Steady Wins the Race

While you may be tempted to try a crash diet or a trendy weight loss program, rapid weight loss can be dangerous and unsustainable.

When you lose weight quickly, your body loses both fat and muscle mass. Losing muscle can slow down your metabolism, making it harder to maintain weight loss over time. Rapid weight loss also increases the risk of developing gallstones, nutrient deficiencies, and rebound weight gain.

A better approach to weight loss is to aim for a slow and steady loss of 1-2 pounds per week. This can be achieved through a combination of a healthy diet and regular exercise. It may take longer to see results, but you’re more likely to maintain your weight loss in the long term.


Losing weight can be a challenging journey, and understanding how it works can make all the difference. Knowing where fat goes when you lose weight and the true science behind weight loss helps you make informed decisions about your health. Remember, weight loss should be one part of an overall plan for living a healthy, balanced life, which includes a healthy diet and regular physical activity.

So start small, and focus on implementing sustainable lifestyle changes that are realistic for you. By prioritizing your health and wellbeing, you can achieve your weight loss goals and maintain them in the long term.

By Riddle Reviewer

Hi, I'm Riddle Reviewer. I curate fascinating insights across fields in this blog, hoping to illuminate and inspire. Join me on this journey of discovery as we explore the wonders of the world together.

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