How many essential amino acids are there?

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Multiple Choice

How many essential amino acids are there?

Explanation:
Essential amino acids are those the body cannot synthesize in sufficient amounts and must be obtained from the diet. There are nine of them for adults: phenylalanine, valine, tryptophan, threonine, isoleucine, methionine, histidine, leucine, and lysine. Arginine is sometimes considered essential in children or during illness, but for healthy adults it is viewed as conditionally essential rather than one of the nine. That’s why the correct count is nine. The other options would be counting amino acids that can be made by the body or are only conditionally required, which doesn’t fit the standard dietary essential list.

Essential amino acids are those the body cannot synthesize in sufficient amounts and must be obtained from the diet. There are nine of them for adults: phenylalanine, valine, tryptophan, threonine, isoleucine, methionine, histidine, leucine, and lysine. Arginine is sometimes considered essential in children or during illness, but for healthy adults it is viewed as conditionally essential rather than one of the nine. That’s why the correct count is nine. The other options would be counting amino acids that can be made by the body or are only conditionally required, which doesn’t fit the standard dietary essential list.

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