L-Theanine, Quantum

Supplement
Find your Zen with L-theanine: Promotes calm, focus, and balanced energy naturally.
  • Stay Calm Under Pressure: Helps maintain a calm mindset during stressful moments.* 
  • Boost Mental Clarity: Supports focus and concentration, even on the busiest days.* 
  • Encourage Restful Sleep: Promotes relaxation and supports healthy sleep patterns without drowsiness.* 
  • Clean and Effective: Free from unnecessary additives or fillers, this formula is designed for consistent safety, purity, and effectiveness.* 
Your Price: $19.95 ea
In stock
$19.95
Item:
12851
L-Theanine, Quantum

Product Benefits

Calm, Focus, and Clarity for Active Lifestyles 
Find your Zen with the clinically studied benefits of L-theanine—an amino acid from green tea leaves that promotes calm, focus, and mental clarity without the drowsy side effects Quantum L-Theanine delivers 200 mg dosage of L-theanine in every capsule, a clinically relevant dose used to support a balanced stress response, promote a positive mood and mindset, and boost cognitive performance.* 

This clean-label L-theanine supplement is ideal for adolescents (12+) and adults seeking reliable support to maintain focus, composure, and balanced energy throughout busy days. With Quantum L-Theanine, you get trusted, targeted benefits for staying sharp and composed—whether managing stress, enhancing focus, or supporting relaxation.* 

Why Choose Quantum L-Theanine? 

  • Clean Label Commitment: Free from fillers, synthetic additives, and unnecessary ingredients—just pure, targeted support. 
  • Third-Party Tested: Verified for purity, potency, and consistent efficacy. 
  • Vegan-Friendly: Non-GMO, gluten-free, soy-free, and manufactured in a GMP-certified facility. 
  • Caffeine Synergy: Smooths out caffeine’s energy peaks, delivering sustained focus while calming the jitters.* 
      
    What Makes Our L-Theanine Quantum? 
    Quantum L-Theanine is a clean-label supplement designed for purity and effectiveness. It is sourced from trusted suppliers and is 100% free from non-nutritive ingredients, binders, or excipients.

How Does It Work? 

Quantum L-Theanine™ promotes calm and focus by: 

  • Encouraging Alpha Brain Waves for a Zen State of Mind: 
    L-theanine promotes alpha brain wave activity, fostering a state of calm, focused alertness—like the mental clarity achieved during meditation. This helps you concentrate and stay composed, even in demanding situations.* 
  • Influencing Neurotransmitters for a Balanced Stress Response: 
    L-theanine plays a key role in mood stability, focus, and cognitive performance by supporting neurotransmitters like GABA, dopamine, serotonin, and glutamate. This balance helps calm overstimulation while promoting emotional resilience and mental sharpness, even under pressure.*
  • Enhancing Caffeine Synergy for Sustained Focus: 
    L-theanine works compatibly with caffeine to smooth energy highs, reduce jitters, and maintain long-lasting focus. Together, they provide calm, steady energy, helping you stay productive without the crashes often linked to caffeine alone.* 

FAQs 

What are the benefits of Quantum L-Theanine? 
Quantum L-Theanine™ promotes calm, focus, and mental clarity, helping to maintain a balanced stress response and healthy sleep patterns.* 

Is it safe for adolescents and older adults? 
Yes! Quantum L-Theanine™ is safe for adolescents (12+) and older adults, making it a versatile supplement for supporting calm and focus across all ages.* 

How does it work with caffeine? 
L-theanine complements caffeine by smoothing energy peaks and reducing jitters, creating sustained focus and calm energy without overstimulation.* 

What is the recommended dose for L-theanine? 
The clinically studied dose for adults and adolescents is 200 mg daily, typically in one or two divided doses.* 

Can Quantum L-Theanine™ be taken daily? 
Yes, Quantum L-Theanine™ is formulated for safe, daily use to support relaxation, focus, and a balanced stress response.* 

L-Theanine, Quantum

Serving Size 1 Capsule
Servings Per Container 60

  • L-Theanine 200 mg
Other Ingredients: Organic Rice Concentrate, Plant-Source Capsules (cellulose, water), Organic Rice Bran

Quantum L-Theanine Recommended Use 

  • Adults: Take 1 capsule, 1-2 times daily with meals or as directed by your healthcare professional. 
  • Adolescents (12-18): Take 1 capsule daily with meals or as directed by a healthcare professional. 
Product FAQ
WHERE ARE QUANTUM SUPPLEMENT INGREDIENTS SOURCED?
Quantum Nutrition Labs (QNL) meticulously sources all of its ingredients, accepting only those that meet the highest quality standards for identity, purity, strength, and composition. We strive to procure sustainably produced botanicals and innovative nutrient blends to deliver the best, most bioavailable ingredients for each of our products.

Once received, all raw materials are held in a 10-day quarantine for an in-depth inspection. We test samples from every shipment lot in our state-of-the-art, USP-certified laboratory. After ingredients are proven to be safe, pure, and free of contaminants, they are moved into the manufacturing phase of supplement development.

DOES QUANTUM HAVE ANY MENOPAUSE-SUPPORT SUPPLEMENTS?
Quantum Women’s Power is formulated with powerful nutrients to support optimal functioning during menopause:

  • Libifem®. This fenugreek seed extract is clinically proven to support sexual health and promote menopausal comfort.*
  • LJ100®. Our Tongkat Ali ingredient is sourced from LJ100™, a standardized root extract of Eurycoma longifolia which consistently delivers evidence-based potency. Tongkat Ali root has a long history of safe use as a natural option for improving testosterone levels and supporting reproductive health.*
  • Women's Botanical Power Blend. This blend includes nutritive, zinc-rich pumpkin seed powder, hormone-balancing saw palmetto berry, and the energizing bioactive components from fermented cordyceps extract and American ginseng.*
HOW DO I ASK QUESTIONS ABOUT YOUR SUPPLEMENTS?
We invite you to call us at 1-800-370-3447, email us at [email protected], or fill out the contact form available on our Contact Us page. Our customer service team is available to respond to inquiries Monday through Friday from 8:00 am to 6:00 pm (CST).
DO QUANTUM PRODUCTS CONTAIN HYDROGENATED OIL, FLAVORING ADDITIVES, ARTIFICIAL COLORS, OR FRAGRANCE?
No, we do not use hydrogenated oils, nor do we use any additives that alter the flavor, color, or fragrance of the product. Our products are also made without:

  • Added preservatives like potassium sorbate
  • Non-nutritive excipients like magnesium stearate
  • Talcum powder, an anti-clumping powder and suspected carcinogen
MY ORDER ARRIVED AND THE CAPSULES LOOK DIFFERENT THAN LAST TIME.
We source ingredients only in their unrefined state, so you may notice that the color, texture, and even odor of a product may vary somewhat between batches and across seasons. Despite these natural variations, each product contains its exact formula and is rigorously tested for purity.
WHAT ARE THE SHIPPING COSTS?
We are pleased to offer free ground shipping for supplement orders over $99.** Ground rate shipping cost is $9.95 for orders below $99. Expedited shipping costs are calculated based on service from our location in Austin, Texas, to your delivery location. The shipping cost will be calculated based on your order's weight and the shipping option you choose at checkout.

**Restrictions apply: Must be regular ground shipping within the contiguous USA. A flat rate of $19.95 shipping to HI and AK applies. Canada will require either FedEx International Economy or FedEx International priority services and cannot be shipped to PO boxes. A flat shipping fee of $32.95 will be charged for FedEx International Connect+ shipments and $54.95 will be charged for FedEx International Priority. Free shipping does not apply to certain heavy products. Please use Contact Us page directly for details.

WHAT IS THE HISTORY OF QUANTUM NUTRITION LABS (QNL)?
QNL was created by Dr. Robert Marshall, Ph.D., CCN, who practiced clinical nutrition for more than 30 years and hosted “HealthLine Now,” a radio show that helped listeners with their health and wellness goals. His whole foods approach to dietary supplementation, which included avoiding nonnutritive excipients and other common, commercially used additives, were, and still are, the foundation of our clean, high-quality, wellness products.

The philosophy behind our “quantum” approach to nutrition is that all living organisms possess a bioenergetic field that transcends physical matter. This biofield can be invigorated by whole food nutrients and phytochemicals that support the body's bioenergetic field, cellular health, and overall functioning. By exclusively utilizing the purest natural ingredients to create our products, Quantum Nutrition Labs aims to harmonize your body with the natural world and help you live your healthiest, most vibrant life.

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