L-Glutamine powder is a dietary supplement containing the most abundant, naturally occurring, non-essential amino acid found in human muscle and blood. It is commonly used in sports nutrition, gut health, and clinical settings to support tissue repair and immune function. 

• Form: A white, odorless, fine crystalline powder.
• Taste/Usage: Generally unflavored and designed to be mixed with cold or room-temperature liquids (water, juice, smoothies) or soft foods like yogurt.
• "Conditionally Essential": While the body produces it, supplementation is often necessary during times of high stress, illness, or intense exercise when the body’s demand exceeds production.
• Micronized: Many brands offer "micronized" powder, which has a smaller particle size for faster, better absorption.
• Purity: Often sold as 100% free-form L-glutamine, which does not require digestion, allowing for fast delivery into the body. 

• Gut Health: Helps maintain the integrity of the intestinal lining (treating "leaky gut") and supports the gut’s immune system.
• Muscle Recovery: Promotes protein synthesis, reduces muscle breakdown (catabolism), and helps decrease soreness after intense training.
• Immune Function: Acts as a vital fuel source for white blood cells and immune cells.
• Clinical Use: Used to treat specific conditions like severe burns, injuries, or to reduce complications of sickle cell disease. 

• Dosage: A common maintenance dose is 5 grams (about 1 teaspoon) taken 1–3 times daily.
• Storage: Should be stored in a cool, dry place, away from direct sunlight and heat.
• Side Effects: Generally considered safe, but high doses may cause constipation, nausea, headache, or abdominal pain.
• Precautions: Individuals with kidney disease, liver disease, or those who are pregnant/nursing should consult a doctor.