In this article. Creatinine is a waste product from the normal breakdown of muscle tissue. As creatinine is produced, it's filtered through the kidneys and excreted in urine. Doctors measure the blood creatinine level as a test of kidney function.The kidneys ' ability to handle creatinine is called the creatinine clearance rate, which helps to estimate the glomerular filtration rate (GFR) -- the rate of blood flow through the kidneys.s creatinine is produced, it's filtered through the kidneys and excreted in urine. Doctors measure the blood creatinine level as a test of kidney function.
There are 163 calories in 1 medium White Potato (Flesh and Skin, Baked). Calorie breakdown: 1% fat, 90% carbs, 9% protein.
Calories and Fat. Sweet potatoes contain more calories per serving than carrots and most other vegetables. One serving of sweet potato, or one medium potato, contains 100 calories, while one serving of carrots, or one long carrot, contains only 30 calories.alories and Fat. Sweet potatoes contain more calories per serving than carrots and most other vegetables. One serving of sweet potato, or one medium potato, contains 100 calories, while one serving of carrots, or one long carrot, contains only 30 calories.