NutraKey - Glutamine

NutraKey Glutamine is pharmaceutical-grade L-Glutamine in two formats — a pure, unflavored powder and easy-to-swallow capsules — both delivering the same single active ingredient at a clinically relevant dose. Glutamine is the most abundant free amino acid in the human body and the most abundant amino acid in skeletal muscle, and it is also among the first to be depleted during intense training. Supplementing with NutraKey Glutamine replenishes these stores, supporting muscle recovery, nitrogen balance, immune system function, and gut health. Powder: 5,000mg (5g) L-Glutamine per 2-scoop serving — unflavored, odorless, and instantly soluble in any beverage. Capsules: 900mg per capsule, 1,800mg per 2-capsule serving, 100 capsules per bottle. Non-GMO. Gluten-free. No artificial colors or dyes. GMP certified. Manufactured in Orlando, FL, USA. Take 1 serving 1-3 times daily.*

Supplement Facts — NutraKey Glutamine

Powder (Per 2 Scoops / 1 Serving)

• L-Glutamine (Pharmaceutical Grade) — 5,000mg

• Available sizes: 300g (~60 servings), 500g (~100 servings), 1000g (~200 servings)
• Unflavored. Odorless. Tasteless. Instant-dissolve.
• Mix 2 scoops in 8-12oz of water, juice, protein shake, or pre-workout. Take 1-3 times daily.

Capsules (Per 2 Capsules / 1 Serving)

• L-Glutamine — 900mg per capsule / 1,800mg per 2-capsule serving

• 100 capsules per bottle — 50 two-capsule servings
• Take 2 capsules with water 1-3 times daily

• Single active ingredient — pure L-Glutamine. No fillers, artificial colors, or dyes.
• Non-GMO. Gluten-free. GMP certified.
• Manufactured in Orlando, FL, USA.
• Can be stacked with creatine, BCAAs, protein powder, or any other supplement without interaction.

Powder or Capsules — Which Format Is Right for You

NutraKey Glutamine is the same pharmaceutical-grade L-Glutamine in two delivery formats designed for different use cases and preferences. The powder format provides a full 5,000mg per serving — the dose used in most sports performance and recovery research — in a completely flavorless, instantly dissolving form that disappears into any liquid without affecting taste. It's the best choice for users who mix multiple powders together (protein + creatine + glutamine in one shake), who want maximum dose flexibility, or who prefer value at scale with the 1000g container. The capsule format provides 1,800mg per serving — a lower dose per serving but in the most convenient take-anywhere format with no mixing required. Capsules are the best choice for travel, work, mid-day dosing when a shaker isn't accessible, or users who prefer not to add powder to an already-complex post-workout drink. Both formats can be used simultaneously — many users take the powder post-workout for the full dose and carry capsules for the second or third daily serving.†

What Glutamine Does and Why Athletes Need More of It

The Most Abundant Amino Acid — and Why That Makes Depletion a Problem

Glutamine is conditionally essential — under normal circumstances the body synthesizes sufficient glutamine from other amino acids, but under conditions of physical stress (intense training, caloric restriction, injury, illness) the demand for glutamine exceeds the body's synthesis capacity. Skeletal muscle is both the primary storage site and the primary producer of glutamine in the body. Glutamine accounts for approximately 60% of the total free amino acid pool in muscle tissue, and during periods of intense training, muscle glutamine stores can be depleted by up to 50%. Low glutamine levels directly impair muscle protein synthesis, slow recovery, compromise immune function, and reduce gut lining integrity — all four of the critical systems that athletes depend on for long-term progress.†

Nitrogen Balance and Anti-Catabolism

Glutamine's role in nitrogen balance is one of its most studied and most important functions for athletes. Nitrogen balance is the ratio of nitrogen intake to nitrogen excretion — a positive nitrogen balance (more nitrogen retained than excreted) is the biochemical indicator of an anabolic state (muscle building). A negative nitrogen balance indicates catabolism — muscle is being broken down. Glutamine is the primary vehicle through which nitrogen is transported between tissues in the body. The glutamine molecule carries two nitrogen atoms, making it the most efficient nitrogen transporter in human biochemistry. By replenishing glutamine stores after training, NutraKey Glutamine supports the maintenance of positive nitrogen balance — preserving the anabolic state during the recovery period rather than allowing the post-training catabolic window to extend unchecked.†

Glutamine is also thought to support anti-catabolism by assisting BCAAs in accessing and repairing muscle tissue. During training, BCAAs are used as fuel through the branched-chain amino acid oxidation pathway; glutamine is thought to "spare" BCAAs from being used for energy by providing an alternative nitrogen and energy source, preserving BCAAs for their primary anabolic role in protein synthesis.†

Muscle Recovery and DOMS Reduction

Glutamine depletion after intense training correlates with increased muscle soreness, longer recovery times, and reduced performance in subsequent sessions. Replenishing glutamine immediately post-workout — when muscle stores are at their lowest — supports faster cellular recovery through two pathways. First, glutamine is directly incorporated into newly synthesized muscle proteins as a building block. Second, glutamine activates mTOR signaling (the primary anabolic pathway governing muscle protein synthesis) through amino acid sensing mechanisms in skeletal muscle, stimulating the protein synthesis process that repairs training-induced damage. Studies on glutamine supplementation in athletes have documented reductions in self-reported muscle soreness and improved recovery markers — though the effect sizes are modest in well-nourished populations and most pronounced in individuals with high training volumes.†

Growth Hormone Stimulation

Select studies have shown that oral glutamine supplementation produces acute elevations in circulating growth hormone — a finding that has contributed significantly to glutamine's popularity in the bodybuilding community. A published study found that 2g of oral glutamine produced a fourfold increase in plasma growth hormone within 90 minutes of administration in healthy subjects. Growth hormone stimulates protein synthesis, promotes fat oxidation, and supports the anabolic recovery process. NutraKey Glutamine's pharmaceutical-grade L-Glutamine at a 5g dose per serving is positioned to support this effect alongside its anti-catabolic and recovery functions.†

Immune System Support

Glutamine is the primary fuel source for rapidly dividing immune cells — particularly lymphocytes and macrophages. Intense exercise creates a period of transient immune suppression ("open window" effect) lasting several hours post-training, during which athletes are more vulnerable to upper respiratory infections and illness. This immune vulnerability is directly linked to the glutamine depletion that intense exercise causes. Replenishing glutamine stores post-workout supports the immune system's ability to maintain normal function during the recovery period. This is why glutamine supplementation is used clinically in medical settings for wound healing, burn treatment, and illness recovery — the immune function support is well-documented at a mechanistic level.†

Gut Health and Intestinal Integrity

Glutamine is the primary energy source for enterocytes — the cells lining the intestinal wall. The gut lining turns over completely approximately every 3-5 days and has extremely high energy demands that are met primarily by glutamine rather than glucose. Under conditions of glutamine depletion, intestinal cell turnover slows, the gut lining integrity is compromised, and intestinal permeability ("leaky gut") can increase — a condition that allows partially digested food particles and bacterial components to enter systemic circulation. Maintaining adequate glutamine levels supports gut lining integrity, improves digestion and nutrient absorption efficiency, and reduces gut-related discomfort that many hard-training athletes experience during periods of high volume or caloric restriction.†

How to Use NutraKey Glutamine — Timing and Stacking

NutraKey recommends 1-3 servings daily depending on training volume and individual goals. The most impactful single daily dose is immediately post-workout — when muscle glutamine stores are maximally depleted and the absorption and utilization capacity of muscle cells is highest. A second serving can be taken first thing in the morning (when overnight fasting has further depleted glutamine stores) or at bedtime (to support overnight recovery and immune function). A third serving is appropriate for athletes in high-volume training phases or during caloric restriction where catabolism risk is elevated.†

The powder format mixes instantly into post-workout protein shakes, pre-workout powders, BCAA drinks, creatine mixes, or plain water without affecting the flavor of anything it's added to. NutraKey specifically notes that glutamine stacks cleanly with vitamins, creatine, BCAAs, and protein powders with no interactions — it functions as a universal add-on that makes any recovery protocol more complete.†

Frequently Asked Questions

1. Should I choose the powder or capsules?
   Powder if you want the full 5g clinical dose per serving, value at scale (1000g = ~200 servings), or the ability to mix glutamine directly into your post-workout shake without adding capsules to your routine. Capsules if you want convenience for travel or mid-day dosing when mixing powder isn't practical, or if you prefer not to add more powder to an already-complex shake. Many users keep both — powder at home post-workout, capsules in their gym bag or at work for additional daily servings.†
2. How much glutamine should I take daily?
   Most sports nutrition research on glutamine uses 5-10g per day. NutraKey recommends 1-3 servings daily (5g per powder serving, 1.8g per capsule serving). For general recovery support, 1 powder serving (5g) post-workout is a solid starting point. Athletes in high-volume training phases, those on caloric restriction, or those who are sick or recovering from injury may benefit from 2-3 servings daily (10-15g total from the powder). There is no well-documented toxicity ceiling for oral glutamine — it has an excellent safety profile at up to 40g/day in research settings.†
3. Does the powder affect the taste of protein shakes or pre-workouts?
   No — NutraKey Glutamine powder is genuinely odorless and tasteless. It dissolves completely in liquid and adds nothing to the flavor of whatever it's mixed into. This makes it one of the easiest supplements to incorporate into an existing shake routine without any product adjustment.†
4. Is NutraKey Glutamine safe for tested athletes?
   Yes. L-Glutamine is an amino acid naturally produced by the body — it is not prohibited by WADA, the NCAA, or any major sports governing body. It contains no stimulants, hormones, or compounds of any regulatory concern. It is one of the most universally appropriate supplements for athletes at any level in any sport.†

How to Take NutraKey Glutamine

Powder: Mix 2 scoops (5g) in 8-12oz of water or any beverage 1-3 times daily. Best taken immediately post-workout as a first priority. Can be mixed directly into protein shakes, BCAAs, creatine, or pre-workout powders. Capsules: Take 2 capsules with 8-12oz of water 1-3 times daily. Both formats: For best results take consistently daily including non-training days — glutamine depletion is cumulative and restoring full muscle glutamine stores takes consistent daily supplementation over multiple days. Not for persons under 18 without physician guidance. Consult a physician before use if pregnant, nursing, or taking any prescription medications.*

Why Buy at Get Yok'd

• Real-time inventory across all five Southern California stores
• Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
• Authorized NutraKey retailer — carrying both powder and capsule formats
• Staff who can help you incorporate glutamine into your complete recovery stack
• One of the best loyalty programs in the supplement industry — earn rewards on every purchase

Who Should Exercise Caution with Glutamine

• Individuals with liver disease or cirrhosis should consult a physician — glutamine metabolism produces ammonia as a byproduct, which the liver normally clears; impaired liver function may affect this clearance
• Individuals with kidney disease should consult a physician for the same reason
• Individuals with a history of seizures should consult a physician — glutamine is a precursor to both GABA and glutamate (excitatory neurotransmitter), and high doses may affect the seizure threshold in susceptible individuals
• Individuals with MSG sensitivity should note that glutamine and glutamate are closely related compounds
• Not for persons under 18 without physician guidance
• Consult a physician before use if pregnant or nursing
• Keep out of reach of children.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.