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Phenylalanine, L-Phenylalanine, DL-PhenylalaninePhenylalanine Metabolism Phenylalanine is a precursor of tyrosine Phenylalanine is metabolized in the liver with phenylalanine hydroxylase Phenylalanine is a precursor of phenylthylamine (brain neurotransmitter) phenylthylamine is found in chocolate Forms L-Phenylalanine is the form used in living organisms D-Phenylalanine is synthetic and can only be converted into phenylethylamine DL-phenylalanine is a combination of both D and L forms DL-phenylalanine has analgesic and antidepressant effects L-phenylalanine is a precursor of brain neurotransmitters Genetics phenylketonuria (PKU) is a deficiency of phenylalanine hydroxylase Chemistry phenylalanine -> tyrosine -> L-dopa -> dopamine -> NE -> EPI Functions precursor of brain neurotransmitters Requirements RDA - 1 g qd Sources cottage cheese, chicken, cheddar cheese Deficiency depression and diminished growth Therapeutics depression, chronic pain, Parkinson's Toxicity may cause anxiety, jitteriness and hyperactivity in children may cause migraines and hypertension due to tyramine sensitivity Interactions tyramine containing foods may potentiate effects
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Fantastic new books! CAM Therapies has studies on natural therapies for over 100 diseases. CAM Labs lists lab tests for 100 diseases. Nutritional Genetics is a fantastic resource.
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