Premier Research Labs, L-Theanine, 60 Plant-Source Capsules
Available in stock Last updated October 21, 2026
Shipping Free on orders above $99
Description Summary
Description Summary
Ingredients
Ingredients
Suggested Use
Suggested Use
Warning
Warning
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Product Details
Premier L-Theanine provides evidence-based, high-potency support for calm focus and balanced mental clarity. Each vegan-friendly capsule delivers 200 mg of L-theanine, a standardized and stabilized active constituent, carefully processed to ensure consistent efficacy. Backed by clinical research, this supplement promotes relaxation, mental clarity, and focus without drowsiness or overstimulation.*
Why Choose Premier L-Theanine?
- Clinically Relevant Dosing: Delivers 200 mg of L-theanine per capsule, the precise amount used in clinical studies for safe and effective support.*
- Clean Label Commitment: No non-nutritive ingredients, fillers, binders, or synthetic excipients—just targeted support.
- 3rd Party Tested: Ensuring purity, potency, and consistent efficacy.
- Vegan-Friendly: Non-GMO, gluten-free, soy-free, and manufactured in a GMP-certified facility.
- Caffeine Synergy: Smooths caffeine peaks for sustained, focused energy without jitters.*
L-Theanine's Mechanism of Action
L-theanine supports alpha brain wave activity, promoting a calm yet attentive mental state. By influencing neurotransmitters like glutamate, GABA, and serotonin, L-theanine helps maintain focus and clarity while managing stress. It also interacts with NMDA receptors to support calm focus without overstimulation.*
- Non-GMO, Gluten-free, Soy-free, Vegan, and Dairy-free
Typically, US domestic orders are delivered within 5 to 8 business days from the day order is shipped unless the product is back ordered (Out of Stock).
Please note that we do not ship on Saturdays and Sundays. International customers please Click Here to find more about the international shipping policy.
The total delivery time for your order is the period of time from when you place your order until the time you receive it. It is comprised of two parts- the processing time and the shipping time.
A. Processing time- The time from when you submit your order to when the item leaves the warehouse. In most cases, this is 3 to 5 business days. Please keep in mind that these are estimates based on previous shipping times and may sometimes take a little longer based on stock availability and demand.
B. Standard Shipping- Standard Shipping typically takes 5 to 8 business days to arrive, within the continental 48 U.S. only, excluding Hawaii, Alaska, Virgin Islands & Puerto Rico.
C. Expedited Shipping- Currently we are not providing Expedited Shipping service(s).
D. Shipping Note- Extra shipping charges might apply for glass items, liquids, probiotics (ships along with ice packs) or heavy weight packages due to the dimensions of the shipping box. Please contact us for any concerns and inquiries.
We - MAPLE HERBS WORLDWIDE INC. are not the manufacturer of the products sold on our website - www.mapleherbs.shop, unless explicitly mentioned.
While we work to ensure that the product information and related details on this website are correct, manufacturers may alter their product labels or product information without any prior notice, which may result in the actual product packaging to look different than shown on our website.
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Please read the labels, warnings and instructions provided on packaging before consuming and do not rely solely on the information presented on our website.
Vitals
| Manufacturer | Premier Research Labs |
|---|---|
| UPC | 807735728519 |
| Count | 60 |
| Form | Capsules |
| Supplement Health Focus | Brain and cognitive health |
| Dietary Preferences | Non-GMO , Gluten-free , Soy-free , Vegan , Dairy-free |
| Product Category | Single Amino Acid Supplements |
| Product Type | Amino Acids |
| Age Group | Adults |
| Country of Origin | USA |
| Shipping Weight | 0.18 lb |