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Friday, March 24, 2006

Requirements and Usage of Amino Acids - four questions

Hello Nutrition community,

I have questions regarding "Requirements and Usage of Amino Acids".

I have not found a list of a recommended daily intake of essential and non-essential amino acids per day (not just the general recommendation of protein intake). Does anyone know if there is such a list on the web?

A second question is: What happens in our body to all the amino acids that do not make a complete protein? Are they still used for something in our body. For example, if you eat beans, they might contain 10 grams of protein per 100 grams, but because they don't make a complete protein and might have a biological value of 30, does that mean that only 3grams of protein is actually used by your body? And what happens to the remaining 7grams of protein (amino acids that cannot be combined)? Are they used in any way in your body or are they just discarded by your body?

Re! garding kidneys: Lets assume that your body discards the protein that do not contribute to a complete protein. I assume that excess protein is filtered by the kidney. Does that mean that the kidney has to filter out more protein, if one consumes incomplete proteins?

Finally, I like to learn more about how to combine certain plant foods in order to obtain complete proteins. While I have read much about general recommendations about how to combine certain plant food on the net: e.g., chickpeas and sesame seeds, peanut butter and whole wheat bread, etc., I have not found information about which ratio of these foods make a complete protein. For example, How many chickpeas should be combined with sesame seeds? 100grams to 20grams? 50grams 50grams? Does anyone know these ratios?

I appreciate help a lot, as I have spent much time on finding answers and wasn't successful!

cheers, Chris