Phenylalanine Dosing and Safety

Avoid with known allergy or hypersensitivity to D-phenylalanine, DL-phenylalanine, or L-phenylalanine.

Phenylalanine may cause abnormal electrocardiogram (EKG) readings, less sunburn (particularly on vitiligo patches), constipation, headache, heartburn,... read more

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