Does weight loss and excessive urination lead to fat excretion

During weight loss, frequent urination is not a manifestation of fat excretion, but a result of changes in the body's water metabolism. Fat is mainly metabolized through respiration and sweat, and an increase in urine output may be related to increased water intake, dietary adjustments, or intake of diuretic components. An increase in urine output during weight loss is common in the early stages of a high protein or low carbohydrate diet. Protein metabolism produces nitrogen-containing waste, which requires more water to help the kidneys excrete. At the same time, reducing carbohydrate intake will lower the body's glycogen reserves, and each gram of glycogen can bind 3-4 grams of water. When glycogen is consumed, this water will be excreted through urine. Drinking caffeinated beverages such as coffee and tea can also have a mild diuretic effect. Some weight loss individuals intentionally increase their water intake to suppress their appetite, which can also lead to an increase in urinary frequency. About 84% of the true fat breakdown products are excreted in the form of carbon dioxide through respiration, and 16% are excreted in the form of water through sweat, urine, etc. The ketone bodies detected in urine are intermediate products of fat metabolism, but under normal weight loss conditions, the ketone content in urine is extremely low. Only a very low calorie diet or a ketogenic diet may result in significant ketone urine. If the foam increases during urination and does not dissipate for a long time, it may indicate that the urine protein is increased, and it is necessary to be alert to the burden of renal function caused by excessive dieting.

It is recommended to maintain a daily water intake of 2000-2500 milliliters to avoid excessive drinking at once, which can burden the kidneys. It can record the changes in fasting weight in the morning, and losing 0.5-1 kilogram per week is within the safe range. If dehydration symptoms such as dizziness and fatigue or continuous abnormal increase in urine output occur, the diet plan should be adjusted in a timely manner and the electrolyte level should be checked with medical attention.