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.
1 large raw egg white from a raw egg contains about 16 calories which means that 33 grams of egg white contains just 16 calories of which 2% comes from the sodium content. The nutrition grade given to this egg white is A. 1  How Many Calories in Boiled Potato.  How Many Calories in Macarons.