All Supplements
Vitamin B3 (Niacin) vs L-Glutamine
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
Vitamin B3 (Niacin)
L-Glutamine
Typical Dosage
14-16 mg daily
5-10g daily
Best Form
Nicotinic acid (niacin)
L-Glutamine powder
Key Benefits
5
5
Evidence Rating
★★★★
★★★
Best Time
With meals to minimise flushing
Post-workout or divided throughout the day with meals
Vitamin B3 (Niacin) Benefits
✓Energy production and metabolism
✓DNA repair and cellular health
✓Cardiovascular health and cholesterol support
✓Brain function and cognitive support
✓Skin health and nervous system function
L-Glutamine Benefits
✓Supports intestinal barrier integrity
✓Enhances immune cell function
✓Promotes muscle recovery and protein synthesis
✓May improve gut health and reduce leaky gut
✓Supports nitrogen balance during catabolic states
Can You Take Both Together?
In most cases, Vitamin B3 (Niacin) and L-Glutamine 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 Vitamin B3 (Niacin) if your primary goal is: energy production and metabolism. Choose L-Glutamine if your primary goal is: supports intestinal barrier integrity. 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.