L-Phenylalanine 1000mg Capsules

From £13.99

Why Buy Me?

  • Stimulates muscle growth 
  • Promotes weight loss 
  • Enhances cognitive function 
  • Boost mood
l-phenylalanine supplements product imagery
L-Phenylalanine 1000mg Capsules From £13.99
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L-Phenylalanine Performance Supplements

Our 1000mg L-phenylalanine nootropic supplement is designed to help accelerate muscle growth, increase weight loss, sharpen your mind, and uplift your mood. 

Phenylalanine is an essential amino acid used to help your body synthesise proteins and produce dopamine. Your body can produce some of it on its own, but not enough to meet its needs.

l phenylalanine banner imagery for power up your workouts
l phenylalanine banner imagery for power up your workouts

The Science

Scientists have observed that L-phenylalanine supplements can help users to regulate their appetite, lower feelings of stress and fatigue, and combat negative emotions.

L-phenylalanine helped to release more cholecystokinin, significantly reducing feelings of hunger.

The reduction in food intake after Phenylalanine (PA) was associated with a greater sensation of fullness compared with placebo, and this finding is in keeping with the proposed action of Cholecystokinin (CCK) - hormone which increases satiety - in reducing food intake.


6 adults

Study Length

6 days

This study found that L-phenylalanine increased plasma tyrosine concentrations, believed to interact with the brain's catecholamines to reduce feelings of stress and mental fatigue.

Phenylalanine increased plasma tyrosine concentrations, which might lead to reduced stress and mental fatigue.


60 adult males

Study Length

2x 4-week trials

This research showed that phenylalanine helped to significantly reduce feelings of anxiety, meaning it could help to improve your mood and emotional wellbeing.

Antidepressant effects of Phenylalanine (P) in comparison to imipramine (I) patients - antidepressant medication).


40 adults

Study Length

30 days

All Natural Ingredients

Ingredients Each serving containsNRV*
L-Phenylalanine 1000mgN/A
Magnesium Stearate   
Vegetable Capsule Shell (Hydroxypropyl Methylcellulose   
Microcrystalline Cellulose   

Take 2 capsules a day with a glass of water. Do not exceed stated dose.

Store in a cool, dry place. Keep out of reach of children. 

Do not exceed the recommended daily dose. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, taking any medication or are under medical supervision please consult a doctor or healthcare practitioner before use. If you experience any adverse effects when taking this supplement, please discontinue use and consult with a physician. Not intended for use by persons under the age of 18.

Taking L-phenylalanine is believed to help relieve feelings of hunger, helping to cut down on food intake. A 2017 study found that L-phenylalanine helped overweight subjects cut down on their calorific consumption and lose weight.

L-phenylalanine is a natural molecule used in the body's everyday functions. However, individuals with phenylketonuria should avoid taking it as a supplement, as their bodies cannot properly metabolise it. This condition is usually diagnosed at birth.

L-phenylalanine is a precursor to many important neurotransmitters that are used to help the brain function at its best. This means that taking l-phenylalanine could help to keep you focused, energised, and alert. That being said, there is no evidence or research available to suggest that it interferes with your sleep. 

Shipping Information

For orders to be shipped within the UK, we ship 7 days a week excluding bank holidays.

*Our cut off Monday to Friday is 4:30pm. Saturday cut off is 11:30am

We offer FREE tracked delivery
for orders over £20


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