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Reference Guide
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Phenylalanine/Tyrosine Ratio
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Phenylalanine/Tyrosine Ratio
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Phenylalanine/Tyrosine Ratio

What's 
Phenylalanine/Tyrosine Ratio
?
If Your Levels Are High
Symptoms of High Levels
If Your Levels are Low
Symptoms of Low Levels

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Phenylalanine/Tyrosine Ratio

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