The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Please click Accept Cookies to continue to use the site.

L-Citrulline Powder

(25 reviews) Write a Review
Our Price: £27.95
Brand: Supplement Place
Availability: In stockIn Stock
Shipping Time:Dispatched Today if you order by 2pm UK Time.

Shop With Confidence


learn more




Rewards Points With Every Order

learn more


learn more

Free UK Delivery over £29 - Free International Delivery over £50


L-Citrulline Supplement Powder

L-Citrulline is a naturally occuring amino acid produced naturally by the body but is also present in some foods such as watermelon. It is used to raise nitric oxide in the blood, which in turn relaxes the hardened artery walls and, in addition to lowering blood pressure, increases blood flow and oxygenation throughout the whole body.


We recommend taking between 5-12g of L-Citrulline daily (1-2 scoops) with or without food. One flat measure of the scoop included is approximately 5g. It has a slightly bitter aftertaste but can be mixed with juice, squash or anything else you prefer. Note that it may take 2-4 weeks for the full benefits of L-Citrulline to become apparent, although nitric oxide production leading to increased blood flow should be noticeable within hours.


  • 100% L-Citrulline Powder

Suitable for vegans and vegetarians.


  • Do not take L-Citrullline during pregnancy or while breast-feeding.
  • Allergies or asthma: L-Citrulline can cause an allergic response or make swelling in the airways worse.
  • Low blood pressure: L-Citrulline might lower blood pressure, which could be a problem if you already have this.
  • Surgery: There is a concern that L-Citrulline might interfere with blood pressure control during and after surgery. Stop taking L-Citrulline at least 2 weeks before scheduled surgery.
  • As always, you should consult your GP is you have any concerns about taking any supplements.


L-Citrulline is a relative newcomer to the market. Researchers have for years concentrated on L-Arginine, but Arginine has had mixed results and in one study even appeared to be dangerous for some men with advanced heart disease. But it did have very beneficial effects on somes. Unfortunately, the dose required to be effective - 5 grams - approaches the daily amount given (9 grams/day) in a study of Arginine where six men died.

Of course, Arginine can be used successfully when at much lower doses (1.5 grams/day) when combined with other supplements such as french maritime pine bark. But all of this goes to show that L-Arginine has definite issues when used by itself. L-Citrulline, on the other hand, seems to produce equal or better results. It is possible to supplement with L-Citrulline by eating watermelon daily but you would probably need around a quarter of an average-size watermelon.

Our L-Citrulline powder is rapidly climbing the ranks of our best sellers (currently Number 4, below three products that we have been selling for years). Unlike Arginine, L-Citrulline does not cause diarrhoea and produces a long-lasting effect rather than the "spike" produced by Arginine.


Current Batch Number: IBAF180904

Current Best Before Date: 09/2021



*Product reviews are the opinions of customers. Individual results may vary.


  • 5
    Jon Stockton

    Posted by Jon Stockton on 14th Feb 2020

    I like the powder. I have difficulty with capsules and empty them into a glass of water. One job less!
    Ps please get Boswellia in! Powdered

  • 5
    Really works

    Posted by Neil Barstow on 9th Sep 2019

    This stuff really does improve blood flow, it seems to help arthritis too. Really makes you feel better

  • 5
    Very Effective

    Posted by Neil Barstow on 2nd Aug 2019

    "Boosts blood flow"? it sure does you can tell it works.

  • 5
    Just the thing.

    Posted by Andre Bellemarre on 8th Aug 2017

    Excellent product, shall be buying again.

  • 5
    Great Product

    Posted by Conor Russell on 9th Jan 2017

    Very happy with this Product as I have Diabetes and this powder massively helps,I also use to help with ED and again I think this is a Great product and has so many benefits:-) happy Customer

  • 5
    A big help!

    Posted by Dawn Lloyd on 22nd Sep 2016

    Waited for a couple of months before this review. Taken with pine bark. Fobbed off by 3 doctors. Gone from nothing at all(no night time or morning!) to almost pre ED. fingers crossed for continued improvement. Will definitely purchase again. Swift delivery and good packaging.

  • 5

    Posted by Peter Szolkowski on 25th Aug 2016

    I take this product to help with blood pressure and atherosclerosis issues. The product and service are excellent.

  • 5
    Product effectiveness

    Posted by Sanjiv Joshi on 18th Aug 2016

    Good product.

  • 5
    Very pleased

    Posted by Margaret on 19th May 2016

    I'm very pleased with the service I have received from Supplement Place. I will continue to use you and have already given your name to a few people. Thank you so much!

  • 5

    Posted by David Crossley on 24th Apr 2016

    Very good product helps with blood pressure will buy again

  • 3
    Powder may be better

    Posted by Richard Ryder on 24th Feb 2016

    Although it's too early to gauge the result I'm minded to go for the powder. You need to take quite a few tablets. Prompt response to order and clarity on delivery status.

  • 5
    very quick delivery

    Posted by Alan Derrett on 25th Jan 2016

    ordered, delivered on time, very prompt service