Please Wait
{{vm.model.title}}
{{vm.model.overview}}
Recommended Products for You
D, L-Phenylalanine Capsules
500 mg, 100 vegetarian capsules Item # 01671
Promotes mood & neurotransmitter health
Click to Zoom
Click to Zoom
D, L-Phenylalanine Capsules
500 mg, 100 vegetarian capsules Item # 01671
Promotes mood & neurotransmitter health
Phenylalanine supplementation helps in the production of healthy neurotransmitters (dopamine, norepinephrine and epinephrine). Clinical trials suggest it may promote positive moods.
Save 12%
First shipment within 1 business day with FREE standard shipping.
Frequently Bought Together
- This Item: D, L-Phenylalanine Capsules, 500 mg, 100 vegetarian capsules
- L-Tryptophan, 500 mg, 90 vegetarian capsules
Total Price:
What Is D, L-Phenylalanine Capsules?
Phenylalanine is an essential amino acid, which means your body can’t produce sufficient amounts and requires it from an external source. It’s converted to L-tyrosine in the liver, which is then converted into dopamine, norepinephrine and epinephrine (adrenaline) hormones that can become depleted for a variety of reasons. Replenishing norepinephrine in the brain can support brain health.
The neurotransmitters produced from phenylalanine supplementation bring a wide range of cognitive health benefits.
D, L-Phenylalanine Benefits
- Supports production of L-tyrosine, which is used to make dopamine, norepinephrine & epinephrine
- Helps promote healthy mood & sleep
- Supports healthy cognitive function
- Provides protection for brain cells
Essential Nutrient to Support Mood and Cognitive Health
D,L-phenylalanine is a 50/50 mixture of its two stereoisomers that can be converted to L-tyrosine in the liver, which is then used to make dopamine, norepinephrine and epinephrine. In addition to acting as a neurotransmitter that supports healthy mood and sleep, norepinephrine is known to protect brain cells by promoting a healthy inflammatory response, inhibiting oxidative stress and supporting healthy neuronal growth.
Life Extension - Why We Do It?
The Best Supplements Science Can Offer
When putting something in your body, you should be confident that you’re getting the nutritional benefits your body deserves. We've been delivering the highest-quality products—backed by science and formulated with the finest ingredients—for over 40 years.
What Matters to You, Matters to Us
We're committed to empowering you to live a healthier life. Whether it’s finding sustainable partners for our ingredients or funding the latest anti-aging research, we're all about your health & wellness.
Highly Recommended
98% of our customers recommend us to family and friends. We're very proud of that because our loved ones matter to us—and we're willing to bet you feel the same way.
Product Transparency
40 years of research dedicated to bringing you premium, scientifically-validated formulations.
Phenylalanine is an essential amino acid that can be converted to L-tyrosine in the liver. Tyrosine is used in the nervous system to make a class of neurotransmitters called catecholamines: dopamine, norepinephrine and epinephrine. Epinephrine, made from tyrosine in the adrenal medulla, functions as a neurohormone and is known as adrenaline.1
MoreThese products are not intended to diagnose, treat, cure, or prevent any disease.
|
||||||||
| Dosage and Use | ||||||||
|
||||||||
| Caution | ||||||||
|
Do not use if you have phenylketonuria. |
||||||||
- KEEP OUT OF REACH OF CHILDREN
- DO NOT EXCEED RECOMMENDED DOSE
- Do not purchase if outer seal is broken or damaged.
- When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Actual Size
- J Nutr. 2007;137(6 Suppl 1):1539S-1547S; discussion 1548S.
- J Neurochem. 2016;139 Suppl 2:154-178.
- Neurosci Biobehav Rev. 2006;30(6):791-807.
- Neurosci Biobehav Rev. 2010;34(5):670-7.
- Eur J Nucl Med Mol Imaging. 2012;39(9):1462-6.
- J Psychiatr Res. 2015;70:50-7.
- Biochem Biophys Res Commun. 2012;426(1):148-52.
- Biochim Biophys Acta Gen Subj. 2017;1861(12):3142-3153.
- Arch Psychiatr Nervenkr (1970). 1979;227(1):49-58.
- J Neural Transm. 1977;41(2-3):123-34.
Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews. Full product reviews disclaimer
Mood & Stress
Quiz
Mood & Stress
Quiz
Feeling out of sorts? Find out which mood-boosting nutrients can keep the stress away.
