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L-phenylalanine is an essential amino acid that can be converted to L-tyrosine in the liver. L-tyrosine can be converted in the brain and in the adrenal glands to dopamine, norepinephrine, and epinephrine (adrenaline) hormones that are depleted by stress, overwork and certain drugs. By replenishing norepinephrine in the brain, mental energy levels are enhanced and a feeling of contentment often occurs. The conversion step from L-tyrosine to norepinephrine may be enhanced if the co-factors (vitamins B6 and C) are included.198-204 Cells in the adrenal medulla synthesize and secrete norepinephrine and epinephrine. Since both norepinephrine and epinephrine can cause smooth muscle (arterial) contraction, care with blood pressure should be taken when supplementing with L-phenylalanine. D,L-phenylalanine is a 50/50 mixture of its two stereoisomers.
Suggested Usage: Take one capsule daily on an empty stomach in the morning,
| Serving Size: 1 vegetarian capsule | Servings Per Container: 100 |
| Amount Per Serving | % Daily Value*** | |
|---|---|---|
| D,L-phenylalanine | 500 mg | |
Other Ingredients:vegetable cellulose (capsule), microcrystalline cellulose, vegetable stearate.
Does Not Contain:Caution May cause anxiety, high blood pressure, and headache. Do not use if you have phenylketonuria. Do not use phenylalanine or tyrosine if you have cancer or muscular dystrophy. Because phenylalanine can elevate blood pressure in hypertensives, consult your healthcare practitioner if you have hypertension. Insomnia may occur from overstimulation if taken too close to bedtime.
Warnings:Keep out of reach of children. As with all dietary supplements, consult your healthcare professional before use. See product label for more information. Caution May cause anxiety, high blood pressure, and headache. Do not use if you have phenylketonuria. Do not use phenylalanine or tyrosine if you have cancer or muscular dystrophy. Because phenylalanine can elevate blood pressure in hypertensives, consult your healthcare practitioner if you have hypertension. Insomnia may occur from overstimulation if taken too close to bedtime.
