All Supplements
L-Arginine vs Melatonin
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
L-Arginine
Melatonin
Typical Dosage
2-3g per day
0.5–5 mg
Best Form
L-Arginine HCl
Immediate release tablet
Key Benefits
5
5
Evidence Rating
★★★
★★★★
Best Time
30-60 minutes before exercise or with meals
30–60 minutes before bedtime
L-Arginine Benefits
✓Enhanced blood flow and circulation
✓Cardiovascular health support
✓Improved exercise performance
✓Wound healing and tissue repair
✓Immune system support
Melatonin Benefits
✓Improved sleep onset and quality
✓Jet lag reduction
✓Circadian rhythm regulation
✓Antioxidant protection
✓Shift work sleep disorder management
Can You Take Both Together?
In most cases, L-Arginine and Melatonin can be taken together safely. However, always check the interactions section of each supplement and consult a healthcare professional if you take medication.
Which Should You Choose?
Choose L-Arginine if your primary goal is: enhanced blood flow and circulation. Choose Melatonin if your primary goal is: improved sleep onset and quality. Many people take both as they target different aspects of health.
Disclaimer: This comparison is for educational purposes only. Always consult a healthcare professional before starting any supplement.