L-Glutamine 850 mg

Name: L-Glutamine 850 mg
Brand: Pure Encapsulations
SKU: product-0447
Price: 30.00 GBP
Availability: InStock
Rating: 4.8 (15 reviews)

£30.00

Supports intestinal barrier integrity and gut lining health
May aid recovery during intense or prolonged training blocks
Helps maintain immune cell function under physiological stress
Conditionally essential amino acid for gut and immune cells
Single-ingredient formula for straightforward, flexible dosing

4.8 (15 reflections)

Subscribe & never run outDelivered monthly, skip, pause or cancel anytime£30.00One-time purchase£30.00

Secure checkoutFree delivery over £5030-day returns

Pure EncapsulationsL-Glutamine 850 mg

Interested in more
personalised recommendations?

Set up your Profile to connect your wearables, biomarkers and test results. Create a bespoke plan based on your unique biology. Expert-led, evidence-based.

Set up Profile now

About This Product.

Pure Encapsulations L-Glutamine 850 mg is a free-form amino acid supplement providing glutamine — the most abundant amino acid in the body and a primary fuel source for the cells lining the gut wall. Glutamine is conditionally essential, meaning demand can outstrip the body's ability to produce it during periods of physiological stress, intense training, illness, or following gut disruption.

It is most commonly used to support intestinal barrier integrity, particularly by those with increased gut permeability, digestive complaints, or who are recovering from a course of antibiotics or a period of poor dietary intake. Athletes in heavy training blocks also reach for glutamine, as prolonged exercise is associated with a measurable drop in circulating levels.

Immune cells — especially lymphocytes and macrophages — rely on glutamine as a key substrate, so supplementing during periods of high demand may help maintain normal immune function alongside adequate dietary protein.

Pure Encapsulations is a brand with a longstanding commitment to clean formulation: minimal excipients, no unnecessary fillers, and a straightforward label. This SKU provides 850 mg of free-form L-glutamine per capsule, allowing flexible dosing. It suits those who want a simple, single-ingredient supplement without proprietary blends or added compounds. As with any amino acid supplement, results are most meaningful when dietary protein intake is otherwise adequate.

Frequently Asked.

Who is most likely to benefit from L-Glutamine supplementation?

Those most likely to benefit include people with gut permeability concerns, individuals in high-volume athletic training, anyone recovering from illness or antibiotic use, and those whose diet is temporarily low in dietary protein. Glutamine is conditionally essential, meaning demand rises significantly under physiological stress.

Can I take this alongside a protein supplement or with food?

Yes, L-glutamine is compatible with protein supplements — it is itself an amino acid. Some practitioners prefer it taken on an empty stomach to maximise absorption by gut epithelial cells, but taking it with a light meal is also reasonable. Check with your clinician if you have a specific therapeutic goal.

How long before I might notice a difference?

For gut-related goals, some people notice a gradual improvement in digestive comfort over several weeks of consistent use, particularly when combined with dietary changes. For immune or recovery support, effects are more subtle and best assessed alongside other markers. There is no universal timeline.

Is this suitable for people with kidney or liver conditions?

High-dose amino acid supplementation is generally approached cautiously in those with significant kidney or liver impairment, as these organs are involved in amino acid metabolism. If you have a known condition affecting either, speak to your GP or specialist before starting.

Why choose a free-form L-glutamine rather than getting it from food?

Dietary sources such as meat, fish, eggs, and dairy do provide glutamine, but the free-form supplement allows a targeted, measurable dose without additional macronutrients. This matters when dosing is being used therapeutically — for example, to support gut repair — rather than purely for general nutrition.

Customer Reflections

Overall Sentiment

4.815 reflections

1 – 6 of 15 reflections

Finally settled my gut after antibiotics

4 months ago

Had a rough couple of months after a long course of antibiotics left my digestion all over the place. Started taking these about three weeks in and noticed a real difference within a fortnight — less bloating, more regular. Nothing dramatic, just a steady improvement. Clean ingredients, no weird fillers, which was exactly what I was looking for.

Solid addition to my training stack

4 months ago

I'm midway through a heavy block of marathon prep and started adding glutamine after reading about how endurance training depletes it. Hard to say whether it's this specifically or everything together, but my gut has felt more settled on long runs. Would buy again.

Simple, effective, no nonsense

5 months ago

Exactly what it says on the tin. Single ingredient, clean capsule, flexible dosing. I take two before bed alongside my magnesium. Gut feels better than it has in a while.

Good product but the capsules are quite large

5 months ago

Quality seems spot on and I do feel like my digestion has improved after about a month. My only gripe is the capsule size — they're on the larger end and I do find them a bit awkward to swallow if I'm taking a few at once. If you don't mind that, they're worth it.

Helped during a stressful period

5 months ago

I work in healthcare and noticed my digestion always suffers when I'm run down or on nights. A colleague suggested glutamine and I've been on this brand for about six weeks now. Gut is calmer, fewer flare-ups of that horrible post-shift bloating. Good stuff.

6 months ago

Been using this for two months now. Swapped from a cheaper powder form and honestly prefer the capsules — easier to fit into a routine. Noticeable improvement in how my stomach handles high-volume training weeks.

L-Glutamine 850 mg

About This Product.

How to Take It

Frequently Asked.

You May Also Like

AEKE B1 Fitness Bench

AEKE K1 AI-Powered Smart Home Gym

Dryft Sleep Mouth Tape Sleep Strips

Google Fitbit Air

Finding your calm in a stressful environment