L-Arginine is a semi-essential amino acid, meaning the body can produce it, but supplementation may be necessary during periods of stress or intense physical activity. It serves as a precursor to nitric oxide (NO), a molecule that plays a critical role in vasodilation — the widening of blood vessels — which improves blood flow and nutrient delivery to muscles during and after exercise.
In the context of sports and fitness, L-Arginine is widely used for its potential to enhance endurance, reduce recovery time, and support cardiovascular health. It also participates in protein synthesis and ammonia detoxification, making it valuable during intense physical exertion.
Its role in stimulating growth hormone release and improving circulation has led to its popularity in pre-workout and recovery supplements.
Synonyms:
Arginine, L-Arg
Benefits:
- Enhances nitric oxide production and blood flow
- Supports endurance and vascular function
- Aids in muscle recovery and nutrient delivery
- May stimulate growth hormone release
- Contributes to immune system function
Sources:
Found in red meat, poultry, fish, dairy, and plant sources such as soybeans and chickpeas. Also synthetically produced for supplements.
Observations:
Commonly included in pre-workouts and nitric oxide boosters. Typical dosages range from 2g to 6g per day. Excessive intake may cause gastrointestinal discomfort. May interact with medications that affect blood pressure.
Areas of Study Related:
Exercise Physiology, Sports Nutrition, Cardiovascular Research, Biochemistry