All Supplements
Glycine vs Citrulline
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
Glycine
Citrulline
Typical Dosage
3-5g daily
6-8g per day
Best Form
Powder
L-Citrulline
Key Benefits
6
5
Evidence Rating
★★★★
★★★★
Best Time
Evening for sleep benefits; anytime for general health
30-60 minutes before exercise or training
Glycine Benefits
✓Improves sleep quality and sleep onset
✓Supports collagen formation and joint health
✓Enhances cognitive function and memory
✓Reduces muscle wasting and supports muscle recovery
✓Promotes relaxation and reduces anxiety
✓Supports immune function
Citrulline Benefits
✓Enhanced blood flow and vasodilation
✓Improved exercise performance and endurance
✓Reduced muscle fatigue and soreness
✓Better erectile function
✓Cardiovascular health support
Can You Take Both Together?
In most cases, Glycine and Citrulline 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 Glycine if your primary goal is: improves sleep quality and sleep onset. Choose Citrulline if your primary goal is: enhanced blood flow and vasodilation. 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.