NOW Foods Supplements, L-Theanine 200 mg with Inositol, Stress Management*, 60 Veg Capsules
$0.25/serving
Price verified Apr 22, 2026
Not evaluated by the FDA · Individual results may vary · Consult a healthcare provider before use
Our verdict
200mg Suntheanine + 100mg inositol per capsule of Suntheanine L-Theanine with Inositol per vegetarian capsule from NOW Foods. Best for suntheanine with inositol at a budget price point.
Why we recommend this
Combines patented Suntheanine with 100mg inositol — a B-vitamin-like compound that supports calm and balanced mood. Best value Suntheanine product at $0.11/serving. GMP-certified manufacturing with rigorous third-party testing.
Check for interactions
Already taking other supplements or prescription medications? Add them below to check for documented interactions, severity, and clinical guidance.
Our database currently documents 137+ supplement and drug-category interaction pairs. Combinations not flagged here may still interact — always consult your healthcare provider before combining supplements, especially with prescription medications.
What to watch out for
Added inositol is a pro for some but unnecessary for others. Not NSF verified. Contains rice flour filler.
Dose & form
- Serving
- 200mg Suntheanine + 100mg inositol per capsule
- Form
- Vegetarian Capsule
- Clinical range
- 100-200 mg daily
- Dose adequacy
- Therapeutic
- Supply
- 60 servings · $0.25/serving
- UPC
- 733739001474
Who it's best for
Suntheanine with inositol at a budget price point
Who should skip it
Those wanting pure L-theanine without added inositol or fillers
Pros
- Best value at $0.11/serving
- Patented Suntheanine
- Added inositol for mood support
- GMP-certified facility
Cons
- Contains rice flour filler
- Inositol addition is not for everyone
- Not NSF verified
What customers say
4.7★ across 7,139 Amazon reviews. The most common questions from shoppers: re any potential interactions with medications, re any side effects from long-term use, and cause any digestive issues or side effects. Full answers in the FAQ below.
Frequently Asked Questions
What is the clinical dose for Suntheanine L-Theanine with Inositol?
What is the clinical dose for Suntheanine L-Theanine with Inositol?
Clinical trials typically use 100-200 mg daily. NOW Foods L-Theanine 200mg delivers 200mg Suntheanine + 100mg inositol per capsule, which we classify as Therapeutic relative to that range.
How does NOW Foods L-Theanine 200mg compare to similar Vegetarian Capsule?
How does NOW Foods L-Theanine 200mg compare to similar Vegetarian Capsule?
See the "Also consider" section below for two alternatives. Choose based on form preference (Vegetarian Capsule vs alternatives), dose adequacy, and third-party testing.
Is NOW Foods L-Theanine 200mg third-party tested?
Is NOW Foods L-Theanine 200mg third-party tested?
Yes — GMP Certified, Third-Party Tested. Third-party testing verifies ingredient identity and label accuracy.
Does this work with Amazon Subscribe & Save?
Does this work with Amazon Subscribe & Save?
Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.
Are there any potential interactions with medications?
Are there any potential interactions with medications?
NOW Foods L-Theanine may enhance sedative medications and blood pressure drugs. The 200mg Suntheanine plus 100mg inositol promote relaxation. Consult your doctor if taking benzodiazepines, sleep aids, or blood pressure medications.
Are there any side effects from long-term use?
Are there any side effects from long-term use?
L-theanine and inositol both have excellent long-term safety profiles. L-theanine is naturally found in green tea and does not cause tolerance or dependency. Inositol is a B-vitamin-like compound naturally present in the body. Safe for extended daily use.
Does it cause any digestive issues or side effects?
Does it cause any digestive issues or side effects?
Very well-tolerated. The 100mg inositol may actually support digestive comfort. L-theanine rarely causes any GI issues. Some users report mild headache at higher doses. Digestive side effects are extremely uncommon at the standard 200mg L-theanine dose.
Can it be taken with other supplements or vitamins?
Can it be taken with other supplements or vitamins?
Pairs exceptionally well with caffeine (the classic nootropic stack). Also complements magnesium, ashwagandha, and GABA supplements. The included inositol means you may not need a separate inositol supplement for mood support.
Are there any specific instructions for taking it safely?
Are there any specific instructions for taking it safely?
Take 1 capsule 1-2 times daily as needed. Can be taken any time — morning for focus (with coffee), afternoon for stress relief, or evening for relaxation. No food requirements. Do not exceed 4 capsules (800mg L-theanine) daily.
How long until benefits are typically experienced?
How long until benefits are typically experienced?
Calming effects are felt within 30-60 minutes. Alpha brain wave increases occur within 40 minutes. The inositol provides additional mood-balancing benefits that compound over days of consistent use. No loading period needed for L-theanine.
Also consider
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