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.
Meanwhile, the sweet potato, which some people think is healthier than the normal potato, contains more calories and carbohydrates. There are 20.5g of carbohydrate and 84 calories in 100g of sweet potato compared with 15g to 18g and 66 calories in 100g of an ordinary potato. It is also classed as a 'starchy food'.