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During exercise, a substantial amount may be lost through sweat. Ī small amount of urea (less than 0.5 g/day) is lost through the gut, lungs, and skin. īeing a diuretic, urea helps the kidneys quickly flush water and other compounds. The bulk of the urea, about 10 g each day, is eliminated by the kidneys. On a normal diet, we produce about 12 g of urea each day. Urea is created not only from dietary protein, but also from protein in your tissues. It binds excess nitrogen from used-up proteins and safely removes it from the body. The liver produces urea as a waste product of proteins breakdown. This post covers the causes of high and low blood urea nitrogen (BUN) and what they may mean for you.īlood urea nitrogen ( BUN) is a measure of the amount of urea in the blood. Testing urea levels in the blood provides information about your health.
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