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Amino Acids

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Amino Acids Overview

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Also indexed as: L-Theanine, Tryptophan, Tyrosine
Amino Acids Overview: Main Image

Side Effects

Many Western diets provide more protein than the body needs, causing excess nitrogen to be excreted as urea in urine. The excess nitrogen has been linked in some studies with reduced kidney function in old age. Some, but not all studies have found that when people have impaired kidney function, restricting dietary intake of protein slows the rate of decline of kidney function.

Excessive protein intake also can increase excretion of calcium, and some evidence has linked high-protein diets with osteoporosis, particularly regarding animal protein. On the other hand, some protein is needed for bone formation. A double-blind study showed that elderly people whose diets provided slightly less than the recommended amount of protein suffered less bone loss if they consumed an additional 20 grams of protein per day. A doctor can help people assess their protein intake and needs.

Copyright © 2011 Aisle7.

The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2013.

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