Certain rtifial sweeteners carry a warining label staing that they ontain large amountsthe amino acid phenylalanine. this warining os important for people who have what?

Certain artifial sweeteners carry a warining label staing that they contain large amounts the amino acid phenylalanine. this warining is important for people who have what?

Phenylalanine is something of a mystery to most people and many of us think it could be a health risk because, as you say, it’s frequently labelled on low-calorie products. However, rather than being a dangerous chemical, phenylalanine is actually an essential amino acid (a building block for protein), which can’t be made by the body and needs to be supplied in the diet. This amino acid is actually found in many foods including meat, fish, milk, eggs and cheese with the result that most of us have large amounts in our daily diet.

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Ithink the answer is talking about their problems