Vegetarian L-Tyrosine Mood non-GMO Gluten-free Stress

D, L-Phenylalanine Capsules

Mood support and neurotransmitter health

Item #01671 500 mg 100 Vegetarian Capsules 1 per serving In Stock
Vegetarian L-Tyrosine Mood non-GMO Gluten-free Stress

D, L-Phenylalanine Capsules

Mood support and neurotransmitter health

Item #01671 500 mg 100 Vegetarian Capsules 1 per serving In Stock

For you, if you are interested in encouraging positive moods

The active ingredients in D, L-Phenylalanine can:
  • Promote L-tyrosine production, that is used to generate dopamine, norepinephrine & epinephrine
  • Support a healthful mood and sleep
  • Encourage a well-functioning cognitive funcion 
  • Offer brain cells protection

D, L-Phenylalanine is a mood support supplement that contains 100 vegan capsules. Perfect for mood and stress management.

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Product details "D, L-Phenylalanine Capsules"

L-phenylalanine is an essential amino acid that cannot be naturally manufactured by your body. It needs to be acquired via external sources and then converted within your body through several steps. It begins in the liver, where it is converted to L-tyrosine. The process continues in the brain and adrenal glands, where L-tyrosine can be converted to dopamine, norepinephrine and epinephrine (adrenaline hormone). These hormones are often reduced by stress, overwork and certain drugs and need to be replenished. Norepinephrine, for example, enhances mental energy levels that often induce a feeling of contentment. The conversion step from L-tyrosine to norepinephrine may be enhanced if the co-factors (vitamins B6 and C) are included.

Cells in the adrenal medulla synthesise and secrete norepinephrine and epinephrine. Because norepinephrine and epinephrine can cause smooth muscle (arterial) contraction, supplementing with L-phenylalanine is not recommended for individuals prone to high blood pressure. D,L-phenylalanine is a 50/50 mixture of the stereoisomers D-phenylalanine and L- phenylalanine.

Health topics:
Supplement Facts

Serving size: 1 vegetarian capsules

Servings per container: 100

Amount per serving:
D,L-phenylalanine 500 mg

Other ingredients: vegetable cellulose (capsule), microcrystalline cellulose, vegetable stearate.

Dosage and use:

Suggested daily intake is one (1) capsule before breakfast or as recommended by a medical practitioner. For maximum benefits, it is best if this product is taken in combination with vitamins B6 and C.


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.




Do not purchase if outer seal is broken or damaged.

If you are undergoing treatment for a medical condition or if you are pregnant or lactating, please consult with your medical practitioner first.

A food supplement should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Store tightly closed in a cool and dry place.

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  2. J Neurochem. 2016;139 Suppl 2:154-178.
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  6. J Psychiatr Res. 2015;70:50-7.
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  8. Biochim Biophys Acta Gen Subj. 2017;1861(12):3142-3153.
  9. Arch Psychiatr Nervenkr (1970). 1979;227(1):49-58.
  10. J Neural Transm. 1977;41(2-3):123-34.

Original source/product from Life Extension®