L-Glutamine, 500 mg – Intestinal barrier, muscle recovery, immune balance and mental clarity through the key cellular amino acid

L-Glutamine 500 mg from Swanson provides L-glutamine FCC (Food Chemical Codex) – 500 mg per capsule, free form, with high food-grade purity, easily usable by the body. Glutamine is the most abundant free amino acid in blood and tissues and plays a central role in maintaining intestinal mucosal integrity, post-effort recovery and supporting immune response. Being the preferred fuel for enterocytes (intestinal cells) and a metabolic resource for immune cells, L-glutamine contributes to restoring body reserves during demanding periods: intense physical activity, stress, restrictive diets or routine changes. The Swanson formula offers a versatile dose, suitable for daily support of wellness targets: digestive comfort, performance and resilience.

Detailed Benefits of L-Glutamine (essential amino acid)

• Intestinal barrier integrity and digestive comfort

The intestinal mucosa is the first line of defense and main platform for nutrient absorption. Enterocytes rely on glutamine as primary energy source for regeneration, differentiation and tight junction maintenance processes.

✅ Supports epithelial recovery and proper "tight junctions" function
✅ Contributes to balanced intestinal permeability and optimal absorption
✅ Favors stable intestinal environment and postprandial comfort

• Muscle recovery and nitrogen balance

Following workouts, glutamine levels in muscles can drop. Replenishing the amino acid pool supports protein synthesis, reducing catabolism and restoring energy stores.

✅ Support for repairing effort-induced microlesions
✅ Contribution to maintaining muscle mass during demanding periods
✅ Optimizes reserve replenishment after workouts or intense activity

• Immune response and resilience

Immune cells (lymphocytes, macrophages) use glutamine for proliferation and function. During stress periods, immunity needs increase, and L-glutamine intake can support a balanced response.

✅ Metabolic fuel for defense cells
✅ Helps maintain immune vigor in the face of stressors
✅ Contributes to inflammatory response homeostasis

• Metabolic balance and acid buffering

Glutamine participates in metabolic cycles involved in nitrogen transport and acid-base balance maintenance, including through its role in bicarbonate generation at kidney level.
✅ Contributes to physiological pH homeostasis
✅ Supports amino acid metabolism and urea cycle
✅ Helps efficient use of energy resources

• Gut-brain axis and mental clarity

A balanced gut supports general comfort and can influence mental state through bidirectional interactions. Through its role in mucosal nutrition and intestinal environment modulation, L-glutamine can indirectly support focus and well-being.

✅ Abdominal comfort, with positive impact on daily mood
✅ Fewer distractions related to digestive discomfort
✅ Support for routine, productivity and clarity

• Versatile for diverse routines: sports, busy periods, diets

Both athletes and people with intense schedules, frequent travel or strict nutritional plans can benefit from consistent intake of this amino acid.

✅ Easy to integrate into performance-oriented regimens
✅ Complementary to wellness strategies and balanced nutrition
✅ Suitable during transition periods (diet changes, stress, new workouts)

• Sustainability of tissues rich in glutamine consumption

Besides intestine and immune system, other tissues with increased turnover also utilize glutamine for anabolic processes and regeneration.
✅ Contributes to providing "metabolic bricks" for active tissues
✅ Integration into synthesis and cellular recovery networks
✅ Support for maintaining daily vital functions

• Quality and purity – L-glutamine FCC (500 mg)

The FCC specification indicates high standards of purity and consistency. Free form facilitates bioavailability and metabolic integration.
✅ Food-grade purity according to Food Chemical Codex
✅ Traceability and quality control
✅ Clear dosage, easy to include in any routine

• Key mechanisms explaining L-glutamine utility

Fuel for enterocytes: provides energy for epithelium maintenance and recovery, supporting tight junctions and healthy mucosal layer.
Nitrogen and carbon donor: participates in synthesis of other amino acids, nucleotides and endogenous antioxidants, influencing cellular redox state.
Immune support: is metabolic substrate for lymphocyte proliferation and macrophage activity, facilitating efficient adaptive response.
Acid-base homeostasis: involved in bicarbonate generation and kidney processes that help balance pH, important especially in recovery.

• Who is it suitable for

Active people and athletes seeking efficient recovery, mass maintenance and reduction of post-effort discomfort.
Professionals with intense schedules who need digestive comfort, stable energy and immunity support.
Users oriented toward intestinal health interested in maintaining mucosal integrity and absorption.
Those going through stress periods and want to support their body's resilience at metabolic and immune level.

L-Glutamine 500 mg, Swanson offers a concentrated approach to the three pillars of well-being – gut, muscle, immunity – through the body's most abundant free amino acid. Through its central metabolic role, the product supports intestinal mucosal integrity, post-effort recovery and immune resilience, contributing to constant energy, digestive comfort and a balanced daily routine.

Directions for Use

As a dietary supplement, take one vegan capsule once or twice daily with water, on an empty stomach or as recommended by your physician.

Other Ingredients

Vegan capsule (hypromellose), rice flour, magnesium stearate, silica. 

Warnings

For adults only. Consult your healthcare provider before using this product or any other product if you are pregnant or nursing, taking medication or have a medical condition.
Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.