Core Nutritionals | Glutamine | 60 Servings

5g pure L-Glutamine. Fully transparent. Recovery without the hype. Core Nutritionals Glutamine is a straightforward single-ingredient amino formula built around one job: delivering a full 5,000mg serving of L-Glutamine with no proprietary blend and no distraction from what the product actually is. That formulation philosophy matters. In a category where glutamine is often buried inside recovery blends or sold with exaggerated promises about muscle growth, Core takes the cleaner and more credible route: one ingredient, one research-relevant dose, full transparency. L-Glutamine is the most abundant conditionally essential amino acid in the body. Under normal circumstances, your body synthesizes substantial amounts on its own, but heavy training, prolonged exhaustive exercise, caloric restriction, illness, gut stress, or other forms of physical strain can increase demand. Mechanistically, glutamine functions as a major nitrogen carrier and a key metabolic fuel for rapidly dividing cells, especially enterocytes in the gut lining and lymphocytes in the immune system. That is the real reason glutamine remains relevant in sports nutrition. It is not because it directly builds more muscle in healthy, well-fed athletes. In fact, the evidence is strong that glutamine is not an effective standalone driver of muscle gain, fat loss, or body recomposition in that population. Where it does make practical sense is recovery support during periods of elevated stress, support for intestinal barrier integrity, and support for immune function when training load is high. The 5,000mg dose here is important because it lands directly at the bottom of the clinically used range of 5g to 15g. That means this is not a token sprinkle. It is a legitimate daily serving consistent with the literature for gut and recovery-oriented use. At this amount, most users will not “feel” a dramatic acute effect the way they would with caffeine or nitric oxide boosters. Glutamine is subtler than that. What you are more likely to notice is that it fits into a recovery plan cleanly: easier compliance, better support when training volume climbs, and a useful tool for athletes whose digestion or overall resilience tends to get worse during harder phases. Synergy-wise, glutamine works best as part of a broader recovery stack. It pairs naturally with BCAAs or essential amino acids in intra- or post-workout settings, and it also makes sense alongside electrolyte formulas for athletes doing long sessions or sweating heavily. That synergy reflects glutamine’s role in systemic recovery rather than acute performance enhancement. From a transparency standpoint, this is exactly what serious buyers should want from a single-ingredient powder. No blend, no hidden doses, no inflated claim architecture. Just 5 grams of L-Glutamine per scoop across 60 servings. Compared with category norms, that level of label clarity is a strength. What should you expect? On day one, mostly nothing dramatic—and that honesty matters. This is not a stimulant and not a pump product. Over 2 to 4 weeks of consistent use, especially during hard training, dieting, endurance work, or GI stress, this formula is designed to support the systems glutamine actually influences most: gut lining integrity, immune demand, and recovery capacity under strain. Core Glutamine by Core Nutritionals contains 5000mg L-Glutamine, a clinical dose for muscle recovery and growth. Key Highlights 5,000mg L-Glutamine per scoop — a full research-relevant serving that lands at the entry point of the clinical 5g to 15g range. This is not a decorative dose; it is a legitimate amount for athletes using glutamine for recovery, gut support, and resilience during high-stress training phases. Single-ingredient formula — no blends, no hidden milligrams, no inflated label theater. You know exactly what you are getting in every scoop, which makes it easy to evaluate against the research and easy to stack with the rest of your regimen. Built around a conditionally essential amino acid — glutamine is the most abundant amino acid in the body, but demand can rise during severe physical stress and exhaustive exercise. Supplementing helps replenish availability when training and recovery demands climb faster than your body can comfortably keep up. Supports the gut lining where it matters most — glutamine serves as a primary metabolic fuel for enterocytes, the rapidly dividing cells that line the intestine. That makes this product especially relevant for athletes whose digestion becomes less stable during intense training, travel, or aggressive dieting. Supports immune-demanding training blocks — glutamine is also used heavily by lymphocytes and other immune cells. That makes it a rational recovery add-on when session volume, frequency, or endurance workload creates more systemic stress. Honest evidence position — glutamine has real utility, but not for everything. The literature supports it far more convincingly for gut integrity, immune function in stressed populations, and clinical recovery settings than for muscle gain or fat loss in already healthy athletes. No proprietary blend ambiguity — many recovery products hide glutamine inside broader amino matrices, making it impossible to know whether the dose is meaningful. Here, the full 5,000mg is disclosed clearly and stands on its own. Easy to stack with protein, EAAs, BCAAs, and hydration products — glutamine has known synergy with branched-chain amino acids and electrolytes in broader recovery protocols. This makes it useful both post-workout and between meals without competing with other staple supplements. Subtle by design, not underpowered — this is not a formula meant to create a dramatic acute sensation. Its value shows up in consistency, especially when hard training, calorie deficits, or endurance work start pushing recovery systems harder. 60 servings per container — enough for daily use through a meaningful training block. That matters because glutamine is most useful when used consistently during periods of elevated physical demand rather than taken randomly. Powder format for flexible dosing — one scoop gives you the standard 5g serving, but powder also makes it easy to split doses if preferred. That flexibility is useful for athletes who want glutamine post-workout, before bed, or around periods of GI stress. Aligned with Core Nutritionals' transparent formulation philosophy — the brand was built in response to hype-driven, filler-heavy products. This formula reflects that ethos perfectly: simple, disclosed, and aimed at educated users who value precision over noise. Core Glutamine by Core Nutritionals contains 5000mg L-Glutamine, a clinical dose for muscle recovery and growth. Who Is This For? Bodybuilders in high-volume hypertrophy phases who are accumulating a lot of muscular damage and systemic fatigue. The 5,000mg dose of L-Glutamine gives them a simple daily recovery support tool that fits easily around training and nutrition without overlapping heavily with their pre-workout or pump stack. Endurance athletes logging long runs, rides, or mixed aerobic sessions that create substantial whole-body stress. Because glutamine is heavily involved in gut and immune support during periods of elevated physical demand, this formula is especially relevant when mileage and session duration are high. CrossFit and functional fitness athletes running frequent high-intensity sessions with limited recovery days. A fully disclosed 5g glutamine serving gives them a practical addition to a recovery stack when training density starts affecting digestion, resilience, or general readiness. Lifters in a calorie deficit preparing for a cut, photo shoot, or physique event. Dieting hard can increase recovery stress and make GI comfort more fragile, and glutamine is one of the more rational add-ons for supporting those systems during aggressive phases. Athletes who prefer modular supplementation instead of proprietary recovery blends. This product gives them precise control: a single clinically relevant glutamine dose they can stack with creatine, EAAs, hydration formulas, or protein without paying for redundant ingredients. People whose gut feels less stable during hard training blocks, travel, or high food volume phases. Since glutamine serves as a key fuel source for enterocytes in the intestinal lining, this formula aligns well with that specific need. How to Use Mix 1 scoop with water, a post-workout shake, or another beverage once daily. The best time is usually post-workout or between meals, but exact timing is less important than taking it consistently because glutamine is not a stimulant-dependent ingredient with a narrow acute performance window. If you are new to standalone amino powders or have a sensitive stomach, you can start with a half scoop to assess tolerance, though 5g is a standard and generally appropriate serving. A shaker bottle is the easiest option for smooth mixing, but a spoon in enough liquid works as well. Taking it on an empty stomach is fine, and taking it with food is also acceptable; food does not meaningfully undermine the purpose of this formula for most users. It stacks especially well with protein, creatine, EAAs, BCAAs, and electrolyte products because it fills a different recovery role rather than duplicating theirs. There is no established need to cycle this product, particularly during hard training blocks where consistent use makes the most sense. Store it in a cool, dry place with the lid tightly closed to protect powder quality and scoop consistency. What to Expect Minutes 0-10: you mix and drink it easily, with no stimulant rush and no dramatic acute sensation expected. Minutes 10-40: still no “kick,” because L-Glutamine is not an energy or pump ingredient; this product is working through recovery-oriented physiology rather than acute nervous system stimulation. During the first few days, the main advantage is convenience and consistency—getting a full 5g serving in daily without guesswork. Through days 1-7, it becomes a reliable part of a broader recovery routine, especially if training volume is high or diet stress is elevated. By weeks 2-4, the value is in ongoing support for the systems glutamine actually serves best, particularly gut lining cells and immune-demanding recovery processes under heavy physical stress. This is a background-support product, not an immediate-performance product, and that distinction is exactly why the right buyer will appreciate it. Key Ingredients L-Glutamine — 5000mg — Clinically aligned glutamine support for recovery and gut resilience Core Glutamine by Core Nutritionals contains 5000mg L-Glutamine, a clinical dose for muscle recovery and growth. Frequently Asked Questions How much glutamine is in each serving of Core Nutritionals Glutamine?Each scoop provides 5,000mg of L-Glutamine. That matches the low end of the clinically used 5g to 15g range, making it a legitimate standalone dose rather than a token amount hidden inside a blend. Is 5 grams of glutamine an effective dose?Yes. Five grams is a research-relevant serving and a common starting point for athletes using glutamine for gut support, recovery support, and resilience during physically stressful training phases. Will Core Nutritionals Glutamine help build muscle?Not directly in the way creatine or adequate total protein intake do. The evidence does not support glutamine as a strong standalone muscle-building ingredient in healthy athletes, but it can still be useful for recovery support, gut lining support, and immune-demanding training periods. What does glutamine actually do in the body?L-Glutamine is the most abundant conditionally essential amino acid in the body and is used heavily by gut lining cells and immune cells. It also plays a role in nitrogen transport and whole-body amino acid metabolism, especially when physical stress is high. When should I take Core Nutritionals Glutamine?Post-workout is a common and practical option, but the most important factor is daily consistency rather than exact timing. It can also be taken between meals, with a protein shake, or at another convenient time in your routine. Can I stack this with creatine or protein?Yes. Core Nutritionals Glutamine stacks very well with creatine monohydrate, whey or isolate protein, EAAs, BCAAs, and hydration formulas because it serves a different role and does not duplicate their primary mechanisms. Will I feel anything right away from this formula?Probably not, and that is normal. Glutamine is not a stimulant, nootropic, or pump ingredient, so its value is in consistent recovery-oriented support rather than an immediate buzz or performance sensation. Does this product contain a proprietary blend?No. This is a fully transparent single-ingredient formula with 5,000mg of L-Glutamine per serving and no proprietary blend hiding the dose. Is this a good option during a cut or contest prep?Yes, that is one of the more sensible use cases. During calorie restriction and hard training, recovery stress and digestive fragility often increase, and glutamine is often used to support those systems. Do I need to cycle glutamine?No standard cycling protocol is required. Since glutamine is an amino acid used for recovery support rather than a stimulant or hormone-active ingredient, it is generally used continuously during demanding training blocks.