No, you don't directly pee out fat, but when your body burns fat for energy, it converts it into carbon dioxide and water, with the water leaving as sweat and urine, while most of the fat (as CO2) is exhaled through your breath, making breathing the primary way you lose fat.
Chyluria (pronounced “kye-lurr-ee-uh”) is a condition in which you have chyle (“kyle”) in your urine (pee). Chyle is fluid from your lymph nodes that looks milky because fats from your intestines have mixed with it.
You don't actually pee out fat, but your body does remove the byproducts of burned fat, mainly water and carbon dioxide. Once your body breaks down fat for energy, it gets rid of this waste through your breath, sweat, and urine. In this way, your kidneys help flush out part of the waste after fat loss.
Most assume that fat simply gets burned off, or that it exits through our urine or faeces. However, the science tells a very different and fascinating story. In fact, only about 10% of fat leaves through bodily fluids like urine.
When you lose weight, your fat is actually exhaled as carbon dioxide! That's right—you breathe out fat. The rest is expelled as water through urine, sweat, and other bodily fluids.
This weight change is temporary and represents the direct loss of the urine's mass from your body. The amount varies based on several factors including how much fluid you've consumed recently, your hydration status, and the time since your last urination.
No single body part loses fat first. Everyone loses fat from different places initially, depending on a variety of factors. In general, women may lose fat from their legs first, and men may lose fat from their torsos first — but it's highly individual.
Why Fat Burning Drinks Work
A major change in your diet, such as severely restricting carbs, can mean your body uses fat for fuel instead of glucose. The breakdown of your body fats can cause your body to produce ketones, which may give the urine an unappealing odor.
If your body is burning fat for energy and producing ketones, it can cause a popcorn-like smell [3]. However, in rare cases, it might indicate Maple Syrup Urine Disease, a metabolic disorder where the body struggles to break down certain amino acids.
Sediment or particles in the urine could indicate various conditions. It might result from urinary tract infections, where bacteria and white blood cells are shed into the urine. It can also be a sign of kidney stones, where solid particles form in the kidneys and pass into the urine, causing pain and sediment.
So you ask “How do I know if I am in fat burn?” The best way to determine if you are in the fat burning state is by recognizing physical cues such as feeling less hungry and more energized and losing weight at a steady rate.
Adele's significant weight loss wasn't from a quick fix but a two-year journey combining intense strength training, Pilates, hiking, boxing, and cardio, alongside major lifestyle changes focused on managing anxiety, not restrictive diets like the Sirtfood Diet, with workouts happening multiple times daily for mental and physical strength. Her routine included morning weights, afternoon hikes or boxing, and evening cardio, emphasizing getting stronger, which naturally led to fat loss and improved well-being.
Drinking water can temporarily boost your metabolism. According to the National Institute of Health, drinking 500 ml of water can increase your metabolic rate by 30 percent for about an hour. A higher metabolism means your body burns calories faster, which is crucial for weight loss.
The most stubborn fat is usually visceral fat, which is the fat that surrounds your internal organs, especially in the belly area. This type of fat is harder to lose compared to the fat just under your skin (subcutaneous fat) and is linked to higher health risks.
What are the first signs you're losing weight?
Some studies suggest that sleep plays a role in weight loss, and specifically fat loss, during calorie restriction. In a study of people undergoing 14 days of calorie restriction, the participants lost less fat when they spent 5.5 h a day in bed than when they spent 8.5 h a day in bed [40].
More frequent urination is a common and natural part of the weight loss process. It's caused by fat metabolism, loss of glycogen, changes in diet, and hormonal changes that occur during dieting.
The 30-30-30 rule for weight loss is a simple morning routine: eat 30 grams of protein within 30 minutes of waking, then do 30 minutes of low-intensity cardio (like a brisk walk) to help with fat loss and appetite control, according to this article from Moshy. Popularized by Tim Ferriss and wellness podcaster Gary Brecka, this method aims to kickstart your metabolism, increase fullness, and burn fat by leveraging your body's depleted glycogen stores after sleep, but it's not a magic bullet and works best as part of a balanced lifestyle, note Healthline and this article from bodyandsoul.com.au.
Some causes of unintentional weight loss include:
Lift weights.
Adding even moderate strength training to aerobic exercise helps build lean muscle mass, which causes you to burn more calories throughout the entire day, both at rest and during exercise.
Ketosis, a metabolic state characterized by the increased production of ketone bodies, can give rise to oily urine. During ketosis, the body shifts from relying on carbohydrates for energy to utilizing stored fat, leading to the breakdown of fatty acids. As a result, ketones are produced and excreted through urine.