All Supplements
Selenium vs Vitamin B3 (Niacin)
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
Selenium
Vitamin B3 (Niacin)
Typical Dosage
55–200 mcg daily
14-16 mg daily
Best Form
Selenomethionine
Nicotinic acid (niacin)
Key Benefits
5
5
Evidence Rating
★★★★
★★★★
Best Time
With meals to enhance absorption; consistent daily timing
With meals to minimise flushing
Selenium Benefits
✓Antioxidant protection through selenoprotein synthesis
✓Thyroid hormone metabolism and immune function
✓Reduced inflammation and oxidative stress
✓Male fertility and sperm motility support
✓Potential cognitive and cardiovascular health support
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
Can You Take Both Together?
In most cases, Selenium and Vitamin B3 (Niacin) 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 Selenium if your primary goal is: antioxidant protection through selenoprotein synthesis. Choose Vitamin B3 (Niacin) if your primary goal is: energy production and metabolism. 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.