Caffeine and L-Theanine work together synergistically. See interaction data, 5-regional dosage standards (FDA/EFSA/TGA/CNS/MHLW), and expert recommendations.
L-theanine helps reduce caffeine jitters (positive interaction).
Recommendation: Taking L-theanine with caffeine may improve focus.
L-theanine helps reduce caffeine jitters (positive interaction).
Tip: Taking L-theanine with caffeine may improve focus.
| Standard | caffeine | l-theanine |
|---|---|---|
| US (FDA) | 100 / 400 mg (RDA/UL) | 200 / 1200 mg (RDA/UL) |
| EU (EFSA) | 100 / 400 mg (RDA/UL) | 200 / 1200 mg (RDA/UL) |
| AU (TGA) | 100 / 400 mg (RDA/UL) | 200 / 1200 mg (RDA/UL) |
| CN (CNS) | 100 / 400 mg (RDA/UL) | 200 / 1200 mg (RDA/UL) |
| JP (MHLW) | 100 / 400 mg (RDA/UL) | 200 / 1200 mg (RDA/UL) |
Values shown as RDA (Recommended Dietary Allowance) / UL (Tolerable Upper Intake Level). Sources: NIH, FDA, EFSA, FSANZ, CNS, MHLW.
Yes. L-theanine helps reduce caffeine jitters (positive interaction). Taking L-theanine with caffeine may improve focus.
Caffeine and L-Theanine have a synergistic relationship. L-theanine helps reduce caffeine jitters (positive interaction). Always follow recommended dosages and consult your healthcare provider for personalized advice.
This page only checks one pair. Use NutriAudit to check your full supplement stack for interactions, duplicates, and safe dosages.
Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.