All Supplements
Glycine vs Vitamin B12
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
Glycine
Vitamin B12
Typical Dosage
3-5g daily
500-1,000mcg daily
Best Form
Powder
Methylcobalamin
Key Benefits
6
5
Evidence Rating
★★★★
★★★★
Best Time
Evening for sleep benefits; anytime for general health
Morning — may be energising
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
Vitamin B12 Benefits
✓Energy production
✓Nerve function and protection
✓Red blood cell formation
✓DNA synthesis
✓May reduce homocysteine levels
Can You Take Both Together?
In most cases, Glycine and Vitamin B12 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 Vitamin B12 if your primary goal is: energy production. 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.