L-Arginine
Also known as: Arginine, L-Arginine HCl, Arginine AKG, Amino Acid
L-Arginine is a semi-essential amino acid that serves as a precursor for nitric oxide production, which regulates blood flow and vascular function. It plays roles in immune function, wound healing, and hormone secretion. Arginine becomes essential during illness, stress, or intense training.
Benefits
Supports cardiovascular health by improving blood flow and endothelial function. May improve erectile dysfunction and sexual performance. Supports immune function and wound healing. Enhances exercise performance and blood flow to muscles. May reduce blood pressure and improve vascularity. Supports muscle growth and recovery. Important for hormone production.
Recommended Dosage
No established RDA. Common supplement doses: 2–5 grams daily. Some athletic studies use 5–10 grams daily. Upper limit: 15 grams daily (based on tolerance). Take separate from lysine-containing foods (competes for absorption). Take with a meal to improve absorption and reduce GI upset.
Food Sources
Poultry (chicken, turkey), beef, fish, pork, eggs, dairy products (milk, yogurt, cheese), legumes (lentils, chickpeas, peas), nuts (peanuts, almonds, walnuts), seeds (pumpkin, sunflower).
Side Effects
Well-tolerated at recommended doses. High doses may cause: nausea, abdominal cramps, diarrhea, bloating, weakness, headache. May worsen asthma or cold sore outbreaks (due to arginine-lysine ratio). May cause hypotension at high doses.
Interactions
Competes with lysine for absorption — taking together reduces both. Nitrates (used for heart conditions) may cause excessive vasodilation and low blood pressure. ACE inhibitors and ARBs may enhance blood pressure-lowering effects. May potentiate blood pressure-lowering medications.
Warnings
Those with herpes simplex virus should monitor lysine-to-arginine ratio (high arginine may trigger outbreaks). People taking blood pressure medications should use caution (hypotension risk). Those with kidney disease should consult doctor. Not recommended during pregnancy without medical guidance. May worsen asthma.
Deficiency Symptoms
Poor wound healing and slow recovery from injury. Weakened immune function. Erectile dysfunction and sexual performance issues. Poor athletic performance and muscle growth. Elevated blood pressure. Reduced growth and development in children.
Frequently Asked Questions
What are the benefits of L-Arginine?▼
Supports cardiovascular health by improving blood flow and endothelial function. May improve erectile dysfunction and sexual performance. Supports immune function and wound healing. Enhances exercise performance and blood flow to muscles. May reduce blood pressure and improve vascularity. Supports muscle growth and recovery. Important for hormone production.
What is the recommended dosage for L-Arginine?▼
No established RDA. Common supplement doses: 2–5 grams daily. Some athletic studies use 5–10 grams daily. Upper limit: 15 grams daily (based on tolerance). Take separate from lysine-containing foods (competes for absorption). Take with a meal to improve absorption and reduce GI upset.
What foods contain L-Arginine?▼
Poultry (chicken, turkey), beef, fish, pork, eggs, dairy products (milk, yogurt, cheese), legumes (lentils, chickpeas, peas), nuts (peanuts, almonds, walnuts), seeds (pumpkin, sunflower).
What are the side effects of L-Arginine?▼
Well-tolerated at recommended doses. High doses may cause: nausea, abdominal cramps, diarrhea, bloating, weakness, headache. May worsen asthma or cold sore outbreaks (due to arginine-lysine ratio). May cause hypotension at high doses.
What are the symptoms of L-Arginine deficiency?▼
Poor wound healing and slow recovery from injury. Weakened immune function. Erectile dysfunction and sexual performance issues. Poor athletic performance and muscle growth. Elevated blood pressure. Reduced growth and development in children.
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Supplement Disclaimer
This supplement information is for educational purposes only and should not replace professional medical advice. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medications, or have a medical condition.