L-Citrulline 1000mg Capsules

From £9.99

Why Buy Me?

  • Enhances athletic performance 
  • Reduces blood pressure 
  • Promote muscle growth 
  • Improve weight training
L-Citrulline supplements product imagery of bottle
L-Citrulline 1000mg Capsules From £9.99
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L-Citrulline Performance Supplements

Our 1000mg L-Citrulline supplements are designed to improve athleticism, decrease blood pressure, and stimulate muscle growth.


Citrulline is a vitally important amino acid, which the body converts into arginine, an essential building block for the synthesis of proteins. Increased arginine levels may help you to better build muscle. 


Arginine also increases the levels of nitric oxide (NO) in your system. Higher NO levels relax your blood vessels, which may lead to increased blood flow. Better blood flow increases the transmission of oxygen and nutrients to your muscles, optimising performance!

L citrulline banner imagery of power up your workouts
L citrulline banner imagery of power up your workouts

The Science

Research into the citrulline amino acid has demonstrated its effectiveness in elevating physical performance, improving blood flow, and increasing muscle power.

Researchers found that the participants who had regularly taken L-citrulline performed noticeably better than those who were given the placebo. Dosage also reduced fatigue and soreness after the exercise.

after L-citrulline supplementation was significantly quicker in comparison to placebo. Intake of L-citrulline for 7 days and I h before the 4-km cycling time trial significantly increased plasma L-citrulline and L-arginine levels and enhanced cycling time trial performance in comparison to placebo.


22 adult males

Study Length

7 days

This study found that L-citrulline reduced diastolic blood pressure by 14% and systolic blood pressure by 6%.

Diastolic blood pressure (DP) was reduced 14% by citrulline and citrulline decreased systolic blood pressure by 6 %.


12 adult 

Study Length

7 days

Scientists got a group of male football players to take a 6-day course of supplements before placing them on a 10-minute full-power cycling test. Participants who had taken the supplement generated significantly more power than those on the placebo.

Mean power output was significantly higher in the L-Citrulline (+ Arginine) group than in the placebo group throughout the 10-min pedalling test (242 vs. 231 W). Power output was significantly greater with Cit + Arg than in the placebo group.


24 adult males

Study Length

1 week

All Natural Ingredients

Ingredients Each serving containsNRV*
L-Citrulline 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.

Citrulline is a naturally occurring amino acid used in your body’s everyday function. There are currently no reported negative side effects from regular usage of L-citrulline supplements.

Users have different experiences when it comes to L-citrulline. Some notice effects quickly, while others experience them after a while. It has been reported to have beneficial effects in as little as 2 days.

This depends on the user. It takes L-citrulline about an hour to increase NO levels, so many take it around 60 minutes before their workout. However, as it is believed to increase concentration, many prefer to take it first thing in the morning to help keep them focused throughout the day. 

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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