L-phenylalanine is an essential amino acid which can be converted to L-tyrosine by a complex biochemical process which takes place in the liver. L-tyrosine can be converted by neurons in the brain to dopamine and norepinephrine (noradrenaline), hormones which 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. Because of the liver conversion necessary for L-phenylalanine to have these effects, L-tyrosine is often faster acting. In addition, the conversion step from L-tyrosine to norepinephrine may be enhanced if the cofactors (vitamins B6 and C) are included.

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 L-phenylalanine or L-tyrosine.*

L-tyrosine is also a precursor of two thyroid hormones. D-phenylalanine is unique among amino acids because the D-form (normally not found in life) has biological activity that is different from its L-stereoisomer. D, L-phenylalanine is a 50/50 mixture of the two stereoisomers.

---

SUGGESTED USAGE
Suggested dose is 500-1000 mg L-phenylalanine in the morning or afternoon preferably on an empty stomach, or as recommended by a healthcare practitioner.

Caution
Cancer patients should avoid taking L-phenylalanine and L-tyrosine. Certain cancers, such as melanoma, depend on these amino acids to fuel their growth. Supplemental use of L-phenylalanine and L-tyrosine may raise or normalize blood pressure. Insomnia may occur from over stimulation if taken too close to bedtime. Individuals with the rare metabolic disorder Phenylketonuria should avoid phenylalanine.

Chinese Name:
Item Weight:
Item Dimension:
Case Weight:
Case Dimension:
Case Quantity: 0
Pack Quantity: 0
Lead Time: 0
Retail Price: $29.40
Other Spec:

Supplement Facts Serving Size 1/4 teaspoon (approx. 725 mg) Servings Per Container 138 Amount per serving %DV L-Phenylalanine 725 mg ** other ingredients: none.

**Daily Value not yet established.

Editor's rating: 0 out of 10
User's rating: 0% 0%

USER'S OPINION  

GUARANTEE/ SHIPPING INFORMATION
L-Phenylalanine Powder - is shipped in a discrete, unmarked package. Orders are processed immediately and usually take about 3 to 5 working days to be received. We do ask that you try it for 2 to 3 weeks to feel the full effects. Any information received is used only for order processing and shipping purposes. Your information, such as e-mail address, will never be disclosed to a third party.

OUR RECOMMENDATIONS

DL Phenylalanine 750 mg - 60 tabs, (Source Naturals)

L-Phenylalanine Caps 500 mg -100 caps, (Country Life)

YOU MAY ALSO NEED...

L Phenylalanine 500mg - 60 caps, (Twinlab)

L-Phenylalanine Caps 500 mg -100 caps, (Country Life)