All Supplements
L-Theanine vs Vitex (Chasteberry)
Side-by-side comparison — benefits, dosage, forms, and research.
Feature
L-Theanine
Vitex (Chasteberry)
Typical Dosage
100-200mg daily
400-500 mg daily of standardised extract (0.6% agnuside)
Best Form
L-Theanine (Suntheanine)
Standardised dry extract
Key Benefits
5
5
Evidence Rating
★★★★
★★★
Best Time
With caffeine for focus, or evening for relaxation
Morning with food; consistent daily use recommended for 2-3 menstrual cycles before assessing effectiveness
L-Theanine Benefits
✓Calm focus without sedation
✓Reduces caffeine jitters when combined
✓Promotes alpha brain waves (relaxed alertness)
✓May improve sleep quality
✓Anxiety reduction
Vitex (Chasteberry) Benefits
✓Reduces premenstrual syndrome (PMS) symptoms including bloating and mood changes
✓Supports regular menstrual cycles and hormonal balance
✓May alleviate breast tenderness and cyclical mastalgia
✓Potentially improves fertility outcomes in women with luteal phase defects
✓Helps regulate progesterone levels in the luteal phase
Can You Take Both Together?
In most cases, L-Theanine and Vitex (Chasteberry) 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-Theanine if your primary goal is: calm focus without sedation. Choose Vitex (Chasteberry) if your primary goal is: reduces premenstrual syndrome (pms) symptoms including bloating and mood changes. 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.