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Home > FAQ > New Product > What is L-Theanine? Benefits for Relaxation and Mental Focus

What is L-Theanine? Benefits for Relaxation and Mental Focus

2026-04-17

What is L-Theanine?

L-Theanine is a naturally occurring amino acid found primarily in tea leaves (Camellia sinensis) and some mushrooms. It is well-known for its unique ability to promote relaxation without drowsiness and support mental focus and cognitive function.

Key Health Benefits

Relaxation: Promotes calm and relaxed state without sedation
Mental Focus: Supports attention, concentration, and mental clarity
Stress Support: Helps manage stress and promotes emotional balance
Sleep Quality: Supports healthy sleep patterns and relaxation
Cognitive Function: Supports memory, learning, and cognitive performance

Main Applications

Stress relief and relaxation supplements
Cognitive health and mental focus formulations
Sleep support products
Mood and emotional balance supplements
Energy and focus blends (often combined with caffeine)

Why Choose Greensky Bio L-Theanine?

High purity L-Theanine (98%+)
Natural extraction from tea leaves
Third-party tested for identity and purity
GMP and ISO22000 certified manufacturing
Suntheanine® or equivalent quality

Product Specifications

Parameter	Specification
Product Name	L-Theanine
Source	Camellia sinensis (Tea leaves)
Purity	98%+ (HPLC)
Appearance	White crystalline powder
Test Method	HPLC
CAS Number	3081-61-6

Packaging & Storage

Packaged in 1kg aluminum foil bags or 25kg drums. Store in a cool, dry place away from light and moisture. Shelf life: 24 months when properly stored.