From Key Supplements
NOW L-Theanine 200 mg Review: Clear Dose, Added Inositol
August 10, 2026
Best for: A clearly dosed vegetarian L-theanine option for someone who is comfortable with a 200 mg capsule.
NOW L-Theanine Double Strength provides 200 mg L-theanine and 100 mg inositol per vegetarian capsule. The formula is transparent, the capsule is vegan/vegetarian, and NOW lists Intertek GMP certification. The main trade-off is that it is not a pure single-ingredient product because it also includes inositol.
What stands out
• 200 mg L-theanine per capsule.
• 60 veg capsules recently listed at $25.99, about $0.43 each before tax or offers.
• Clearly disclosed 100 mg inositol.
• Intertek GMP certification and a clear allergen statement.
What to consider
The evidence for L-theanine should not be overstated. This product is not a treatment for anxiety or chronic sleep problems. Consult a clinician before use if pregnant, breastfeeding, taking medication, or managing a health condition.
Verdict
A transparent, practical option for a buyer who is comfortable with the dose and added inositol. Read the full guide at https://keysupplements.com/best-l-theanine-supplements-what-to-look-for/.
Affiliate disclosure: We may earn a commission from qualifying purchases, which never changes our assessment. Educational content only; not medical advice.