About Gains L-Citrulline
Gluten FreeGenetically Modified FreeWheat FreeDairy FreeVeganVegetarianNatural Flavours and Colours


4.67 out of 5 based on 6 customer ratings
(6 customer reviews)

L-Citrulline has been shown to improve energy, high intensity exercise performance, endurance and recovery. This amino acid relaxes blood vessels, improves blood flow and consequently reduces blood pressure and toxin build up in the body.

  • Increases endurance
  • Enhances muscular pump
  • Naturally boosts energy
  • Reduces fatigue and Increases recovery
  • Improves high intensity exercise performance
  • Increases blood flow throughout entire body
  • Lowers blood pressure
  • 100% natural with no additives


SKU: n/a.

Product Description

Research has demonstrated L-Citrulline’s effectiveness in reducing fatigue and increasing high intensity sport performance. This unique amino acid is derived naturally from watermelon and raises nitric oxide levels, increases blood flow, oxygen delivery to the muscle and enhances your body’s ability to remove waste toxins such as lactic acid. L-Citrulline may therefore help combat physical and mental fatigue, ideal for both increasing daily energy and providing that edge in both training and competition.

Additional Information


1 week supply, 250g Powder, 500g Powder, 1kg Powder

Suggested Use

We recommend taking between 5-6g of L-Citrulline daily with or without food. On training days, take 3g (approximately a teaspoon) 60 minutes before, and 3g within 60 minutes after your workout. On rest days, take 3g in the morning and 3g late afternoon. Please note that it may take 2-4 weeks for the full benefits of L-Citrulline to become apparent, however, increased blood flow – due to raised nitric oxide – should be noticeable within hours.


100% pure and natural L-Citrulline powder.

Important Information

Food supplements should not be used as a substitute for a varied diet and healthy lifestyle. If you are pregnant, breastfeeding, taking any medications or under medical supervision, please consult a doctor before use. Discontinue use and consult a doctor if adverse reactions occur. Not intended for use by persons under the age of 18. Keep out of reach of children. Store in a cool, dry place. Do not exceed the stated dose.

L-Citrulline Research

Here are some studies that support the content on this page. We’ve tried to present a good mix of relevant research and have included page links if you want to do some further reading. This is by no means an exhaustive list of the studies carried out on the effects of L-Citrulline, but we hope that you find it useful.

Bailey, S.J., Blackwell, J.R., Lord, T., Vanhatalo, A., Winyard, P.G. & Jones, A.M. (2015) l-Citrulline supplementation improves O2 uptake kinetics and high-intensity exercise performance in humans. Journal of Applied Physiology, 119(4), 385-395.

Cormio, L., De Siati, M., Lorusso, F., Selvaggio, O., Mirabella, L., Sanguedolce, F. & Carrieri, G. (2011) Oral L-citrulline supplementation improves erection hardness in men with mild erectile dysfunction. Urology, 77(1), 119-122.

Curis, E., Crenn, P. & Cynober, L. (2007) Citrulline and the gut. Current Opinion in Clinical Nutrition and Metabolic Care, 10(5), 620-626.

Hickner, R.C., Tanner, C.J., Evans, C.A., Clark, P.D., Haddock, A., Fortune, C., Geddis, H., Waugh, W. & McCammon, M. (2006) L-citrulline reduces time to exhaustion and insulin response to a graded exercise test. Medicine and Science in Sports and Exercise, 38(4), 660-666.

Ochiai, M., Hayashi, T., Morita, M., Ina, K., Maeda, M., Watanabe, F. & Morishita, K. (2012) Short-term effects of L-citrulline supplementation on arterial stiffness in middle-aged men. International Journal of Cardiology, 155(2), 257-261.

Pérez-Guisado, J. & Jakeman, P.M. (2010) Citrulline malate enhances athletic anaerobic performance and relieves muscle soreness. Journal of Strength and Conditioning Research, 2010, 24(5), 1215-1222.

Romero, M.J., Platt, D.H., Caldwell, R.B. & Caldwell, R.W. (2006) Therapeutic use of citrulline in cardiovascular disease. Cardiovascular Drug Reviews, 24(3-4), 275-290.

Sureda, A., Cordova, A., Ferrer, M.D., Tauler, P., Perez, G., Tur, J.A. & Pons, A. (2009) Effects of L-citrulline oral supplementation on polymorphonuclear neutrophils oxidative burst and nitric oxide production after exercise. Free Radical Research, 43(9), 828-835.

Suzuki, T., Morita, M. & Kobayashi, Y. & Kamimura, A. (2015) Oral L-citrulline supplementation enhances cycling time trial performance in healthy well-trained males. Journal of the International Society of Sports Nutrition, 12(1), 52.

Suzuki, T., Morita, M., Kobayashi, Y. & Kamimura, A. (2016) Oral L-citrulline supplementation enhances cycling time trial performance in healthy trained men: Double-blind randomized placebo-controlled 2-way crossover study. Journal of the International Society of Sports Nutrition, 13, 6.

van Wijck, K., Wijnands, K.A., Meesters, D.M., Boonen, B., van Loon, L.J., Buurman, W.A., Dejong,C.H., Lenaerts, K. & Poeze, M. (2014) L-citrulline improves splanchnic perfusion and reduces gut injury during exercise. Medicine and Science in Sports and Exercise, 46(11), 2039-2046.

6 reviews for L-Citrulline

  1. 5 out of 5


    Have been taking L-citrulline for a couple of months now – I absolutely love the stuff. Get a real sense of well being after taking it and feel that it helps me get more out of my training sessions. Excellent product, highly recommend it.

  2. 5 out of 5


    Always feel better after taking L-citrulline before and after a workout. I’ll be going for the post and pre workout bundle next! Great service, great product, great company.

  3. 4 out of 5


    Excellent natural product and delivery was quick too.

  4. 5 out of 5


    Citrulline is awesome. In my opinion, one of the best natural stim free post training supplements available. Gives me such a good pump during my workouts.

  5. 4 out of 5


    Good product, fast delivery.

  6. 5 out of 5


    Never taken supplements before, but About Gains said that this stuff would help me in my training. They weren’t wrong. I’m impressed with the results and will now be taking regularly.

Add a review