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SIS L-Glutamine 250g


SIS L-Glutamine 250g is an amino acid and an important fuel for the immune system, the brain and gut mucosal cells. It is at the heart of a mechanism controlling acid:base balance.

SIS L-Glutamine 250g


SIS L-Glutamine 250g is an amino acid and an important fuel for the immune system, the brain and gut mucosal cells. It is at the heart of a mechanism controlling acid:base balance.


Although glutamine is classified by nutritionists as a ‘non-essential amino acid’, it is probable that no single amino acid has received as much attention in clinical nutrition research and increasingly this interest has spread to sports nutrition. In order to understand how a ‘non-essential amino acid’ can attract so much attention it is necessary to understand where the term ‘non-essential’ comes from. An amino acid is only considered essential if it is not possible for the body to make the particular amino acid when there is adequate supply of other ‘essential’ amino acids. Since it is possible to make glutamine from many different amino acids, including glutamic acid, valine and isoleucine, it is not considered essential. However, the fact that the body has a number of ways to produce glutamine may serve to illustrate its importance. Glutamine is also a precursor for many other amino acids, an important fuel for the immune system, the brain and gut mucosal cells and is at the heart of a mechanism controlling acid/base balance. It may also be a direct regulator of protein synthesis and regulation. Thus glutamine is at the heart of a metabolic cross roads and its adequate supply is thus crucial for optimal functioning of the body.




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We offer a range of delivery services for our UK and International customers. UK Customers can select our FREE standard delivery option on most non bike orders over £20. Or if you’re in a hurry you can upgrade to our Next Day, Saturday or Sunday delivery services. You can also use our free Click & Collect service, where you can collect your purchases from a choice of over 50 Evans Cycles stores. International customers can benefit from FREE delivery on most orders and save UK VAT if we are shipping outside of the EU.

Bike build & delivery

UK bike delivery charge includes assembly by our fully trained mechanics, pre-delivery inspection and safety check, packing in our custom bike box, multi-tool and delivery from only £9.99 per bike.Click here to see how we deliver your bike

Standard, Next Day, Saturday & Sunday UK delivery

We offer a FREE standard delivery service on orders over £20, as well as Next Day, Saturday & Sunday delivery options to UK addresses. Click here for more details

Click & Collect

Using our Click & Collect service your order will be delivered to a choice of over 50 Evans Cycles stores nationwide for collection. This service is FREE of charge for all orders. To check store stock and collection times, use the "Check store stock" button above. Click here for more details

International delivery (Incl BFPO, ROI, Channel Island & Isle of Man)

We offer a FREE delivery service on most International orders. Orders delivered outside the EU are exempt from VAT. To calculate the charges for your order simply add products to your basket and proceed through the checkout process, where you will need to enter your delivery details. Our website will present you with the relevant delivery options and the charges for your basket of goods. Click here for more details.

Easy Returns

Our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you are not, please feel free to return your goods within 90 days of the purchase date for a full exchange or refund. Returns can be made in your local store or sent back to our distribution centre.

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