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L-Theanine

    • Product Name L-Theanine
    • Alias l-theanine
    • Einecs 242-007-6
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    Specifications

    HS Code

    772867

    Name L-Theanine
    Chemical Formula C7H14N2O3
    Molecular Weight 174.20 g/mol
    Source Primarily found in tea leaves (Camellia sinensis)
    Appearance White crystalline powder
    Solubility Water-soluble
    Taste Umami
    Melting Point 217-224°C
    Biological Role Amino acid analog
    Common Uses Dietary supplement for relaxation and focus
    Cas Number 3081-61-6
    Route Of Administration Oral
    Stability Stable under normal conditions
    Synonyms γ-Glutamylethylamide
    Origin Naturally occurring

    As an accredited L-Theanine factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing White plastic bottle labeled "L-Theanine 200mg," containing 120 vegetarian capsules. Features dosage instructions, supplement facts, and safety warnings.
    Shipping L-Theanine is shipped as a non-hazardous chemical, typically packaged in sealed, moisture-resistant containers to preserve its quality. The product should be kept away from direct sunlight, moisture, and extreme temperatures. Shipping usually complies with standard regulations, requiring appropriate labeling and documentation but not classified as dangerous goods.
    Storage L-Theanine should be stored in a cool, dry place, away from direct sunlight and moisture. Keep the container tightly closed when not in use and store at room temperature (15–25°C or 59–77°F). Protect from heat and incompatible materials, such as strong oxidizers. Ensure good ventilation in the storage area and keep out of reach of children and unauthorized personnel.
    Application of L-Theanine

    Purity 99%: L-Theanine purity 99% is used in dietary supplements, where it enhances relaxation and reduces stress with minimal impurities.

    Particle size <50 µm: L-Theanine particle size <50 µm is used in functional beverages, where it ensures rapid dissolution and uniform distribution.

    Melting point 214–216°C: L-Theanine melting point 214–216°C is used in instant tea formulations, where it provides thermal stability during processing.

    Water solubility 20 mg/mL: L-Theanine water solubility 20 mg/mL is used in ready-to-drink products, where it allows for clear solutions and efficient bioavailability.

    Stability temperature up to 70°C: L-Theanine stability temperature up to 70°C is used in hot beverage applications, where it maintains structural integrity and avoids degradation.

    Assay ≥98%: L-Theanine assay ≥98% is used in pharmaceutical preparations, where it guarantees precise dosing and consistent efficacy.

    Low residual solvent <0.1%: L-Theanine low residual solvent <0.1% is used in nutritional capsules, where it minimizes toxicological risks and meets regulatory standards.

    Moisture content <1.0%: L-Theanine moisture content <1.0% is used in powder blends, where it prevents caking and extends shelf life.

    Optical purity (enantiomeric excess >99%): L-Theanine optical purity (enantiomeric excess >99%) is used in neurocognitive formulations, where it optimizes bioactive performance.

    Bulk density 0.35–0.45 g/cm³: L-Theanine bulk density 0.35–0.45 g/cm³ is used in tablet manufacturing, where it ensures consistent tablet weight and compressibility.

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    For samples, pricing, or more information, please call us at +8615371019725 or mail to admin@sinochem-nanjing.com.

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    Certification & Compliance
    More Introduction

    L-Theanine: Thoughtful Choices for Real Lives

    Recognizing L-Theanine’s Place in Daily Wellness

    Stepping into any health and wellness section these days, L-Theanine always gets my attention. Found naturally in green tea leaves, this amino acid has won a loyal following among people looking to steer clear of the racing mind that modern life often brings on. L-Theanine owes its reputation not just to ancient tea traditions but also to the careful attention paid by today’s supplement producers, eager to offer something both genuine and practical.

    I think back on my college days when a cup of green tea was more than just warm comfort — it was a helpful anchor before big presentations. Only later did I learn that L-Theanine was doing work behind the scenes. What struck me was the clarity I felt: calm, yet not drowsy. Caffeine gets a lot of press for keeping people up, but true focus means more than raw alertness. That clean edge, without a jittery rush or abrupt letdown, gets its roots from L-Theanine.

    How Today’s L-Theanine Products Take Shape

    The L-Theanine products I see now typically come in capsules or tablets, often in the 100 mg to 200 mg per serving range. Some companies blend it into drink mixes or lozenges, but capsules continue to dominate store shelves thanks to their convenience and consistent dosing. The packaging tends to be fuss-free: a bottle, a clear label — no miracle claims, just a straightforward look at the ingredient list.

    Reputable L-Theanine models disclose their source (usually naturally fermented or tea-extracted), and I look for third-party testing. That independent lab stamp carries real meaning. An extra step by the manufacturer signals accountability which, for any supplement, builds trust. I’ve held these bottles side by side—one with a simple green tea extract, another with 100% pure L-Theanine. A pattern emerges: high-quality L-Theanine avoids excess additives, artificial colors, or fillers that your body simply doesn’t need.

    What Sets L-Theanine Apart From Other Products?

    Plenty of products on wellness shelves promise calm or sharper thinking. Ashwagandha, valerian, GABA, melatonin — the list gets long. L-Theanine stands out by bridging the often divided territory between relaxation and alertness. Instead of causing grogginess, it supports a kind of calm that keeps thoughts nimble but anxiety in check. Taking it in the afternoon, I don’t get the post-lunch drag or restlessness. After a cup of tea, or later using a capsule on a sleepless night, I’ve noticed the gentle ease compared to valerian or melatonin, which can leave me oversedated or foggy the morning after.

    Facts back up this experience. Clinical studies, mostly from universities in Japan and Europe, show that L-Theanine promotes alpha brain waves, linked to relaxed alertness. Researchers point to its ability to cross the blood-brain barrier and support neurotransmitters such as GABA and dopamine. Unlike caffeine or straight-up stimulants, L-Theanine avoids overstimulation and the racing heart — traits that have left many untrusting of diet pills or strong cognitive enhancers.

    This difference matters in real life. Students use L-Theanine before exams to focus and avoid test jitters. Office workers use it to dampen background stress without sacrificing productivity. Athletes — myself included during marathon training — appreciate how it softens the pre-competition nerves without blunting physical readiness. Only a handful of other supplements even come close in offering this kind of dual support.

    Responsible Use: Facts and Personal Experience

    Long-term users in health forums often bring up safety. L-Theanine continues to get classified as “generally recognized as safe” in the recommended dosages. I always urge others to stay close to the 100 mg to 200 mg per session mark, since researchers rarely explore higher dosages outside the lab. People already on medications or who are pregnant should check with their doctor. No supplement, no matter how gentle, replaces medical advice.

    Unlike some herbal calming agents that carry a sleep aid label, you won’t find strong habit-forming risks flagged for L-Theanine. Its lack of sedative hangovers allows for use during the day—a rarity in the stress-relief category. Years ago, I kept a bottle in my desk drawer during a particularly demanding work project. Forty minutes after a capsule, I’d notice the cloud of worry shrink a bit, and clarity would set in without all the baggage of drowsiness or feeling checked out.

    Digging Into the Differences: Synthetics, Blends, and Purity

    Some L-Theanine products come straight from tea leaves; others use fermentation. Both paths arrive at the same molecule, but purists swear by the shade-grown Camellia sinensis source for an “authentic” feel. Leading supplement companies often produce L-Theanine through a bio-reactive fermentation of glutamic acid, which brings sustainability and consistency. Either way, an honest supplier lists the method, often updating formulations based on new science or better quality checks.

    Blends complicate the shelves. Many brands mix L-Theanine with caffeine, magnesium, or even other herbal extracts to build specific mood-boosting, focusing, or relaxing formulas. While these hybrids offer multi-purpose appeal, I’ve found simple, pure L-Theanine more predictable, especially for anyone just starting out. Blends have a place, but knowing exactly what you’re taking builds a firmer foundation for judging results. In my own experiments with blended supplements, the unpredictable synergy—good or bad—muddies the cause-and-effect puzzle when dialing in self-care routines.

    How L-Theanine Can Fit Into Busy Schedules

    In practical terms, L-Theanine is easy to layer into a routine. Morning coffee can leave me wired, so I pair it with a 100 mg dose of L-Theanine, mellowing the edge without losing focus. I’ve known shift workers who take it to reset at the end of a long night or students using it before social events where nerves spike. The flavor in tea is subtle—almost sweet—and the capsules or tablets are tasteless and portable.

    What’s clear is that L-Theanine users rarely talk about dramatic transformation. Most describe a gentle ease—a step away from mental static, not a leap toward sedation. There’s no “high” here, just a softening that never steals the ability to engage. Unlike valerian or heavy sleep aids that hit like a brick, or energy drinks that push focus into anxiety, L-Theanine quietly takes the edge off, often making tough days a touch more manageable.

    Sorting Through Myths and Reality

    Friends sometimes ask if L-Theanine will “fix” stress or cure sleep issues. That’s not how it works. Health is a mosaic of habits—movement, food, sleep hygiene, relationships—and no single compound completes the picture. L-Theanine can only offer what it can: a modest buffer between nerves and peace of mind.

    Some marketers push wild claims, but I prefer the voices in science journals. A few key studies observed that people given L-Theanine had lower subjective stress under pressure and better test scores than placebo-takers, but not all trials agree on mechanism or magnitude. The body of evidence keeps expanding, and while I respect these findings, I also understand research isn’t one-size-fits-all. Bodies vary. Stress comes from countless sources, many outside the realm of anything a capsule can touch.

    What to Look For in a Good L-Theanine Supplement

    I always check the sourcing: reputable labels specify “Suntheanine” or explicitly state “L-Theanine,” not “D-Theanine” or “Theanine blend.” The L-form, naturally found in tea, matches what’s been tested in most human trials. Some products just use “Theanine” as shorthand and bulk it out with other amino acids, diluting the results. Ingredient transparency, clean labeling practices, and third-party testing all increase my confidence that what’s advertised is what I’m actually swallowing.

    Capsule vs. tablet is a matter of preference. Some opt for fast-dissolving forms if occasional sleep support is the goal, while others stick to classic capsules for ease of measurement. Those who want the ritual of tea still get modest L-Theanine intake per cup — but supplements offer the specific dosage often studied in research. For anyone living with caffeine sensitivity, the ability to take L-Theanine on its own, without the mild stimulants found in tea, makes life easier.

    Real-World Scenarios: Who Benefits From L-Theanine’s Unique Approach?

    Working professionals—especially in high-pressure roles—like keeping L-Theanine in their desk drawer for pre-meeting nerves. Teachers mention its gentle focus enhancement before parent conferences or public talks. Students use it before exams or major deadlines. Evening shift employees, night-shift nurses, or people with fluctuating sleep schedules use L-Theanine to cue their bodies for daytime rest, sidestepping grogginess from sedating agents.

    Sports coaches talk about using it with their teams before competition, not for sedation but for mental steadiness in clutch moments. I’ve found it personally useful before big events or travel—a sort of psychological soft landing. People on creative teams rely on it to block intrusive thoughts and foster a quiet, stable headspace during brainstorming sessions. Even parents facing noisy homes and full schedules pick it up to find the breath between chores and endless requests.

    These stories pile up not as miracle tales but as steady accumulations of small wins: fewer anxious spirals, more focus under pressure, gentle evenings that usher in steadier sleep without stealing the morning’s clarity. Consistency becomes the everyday hero.

    Misunderstandings and Common Concerns

    Curiosity often brings up the question of side effects. Most reports suggest minor or no side effects at standard dosages, though a sensitive stomach occasionally pops up and a rare headache now and then. Those on antidepressants or anxiety medications should consult a healthcare provider, since L-Theanine’s effect on neurotransmitter levels might—at least theoretically—combine unpredictably with prescription drugs.

    People occasionally expect L-Theanine to “cure” chronic insomnia or replace healthy sleep hygiene. The real-world use tends to reinforce good sleep habits, not replace them. Same goes for stress management: L-Theanine isn’t a substitute for resolving life’s bigger issues. It works best as a gentle addition to a toolkit that also includes movement, meaningful work, and reliable support systems.

    Supporting Evidence and Expert Views

    L-Theanine has generated genuine scientific interest. Reviews from peer-reviewed journals point to brain imaging studies that show subtle increases in alpha-wave activity, consistent with a state of relaxed mental clarity. These shifts don’t match sedation from antihistamines or calming herbs—the effect is more like dropping mental static while letting creativity and focus remain front and center.

    Nutritional psychiatrists weigh in, noting L-Theanine’s potential as part of broader strategies for mood support during periods of high chronic stress. Nutritionists often recommend it to clients struggling with focus during hectic days, or for those who need mental clarity without more coffee or harsh stimulants. Physicians caution users to keep reasonable expectations: L-Theanine isn’t a magic bullet, but for many, it earns its modest claims through steady use and measured results.

    Setting Expectations: What L-Theanine Really Offers

    Perhaps L-Theanine’s greatest value comes from the role it fills in modern life’s growing gray zone: too wired for relaxation, too tired for concentration. Its appeal is grounded in the reality that most people aren’t looking for major transformations—just a more level state of mind. While it can’t erase job stress, heal relationships, or rebuild purpose after burnout, it often brings enough relief to face hard days with a bit more resilience.

    For someone new to supplements, L-Theanine stands as a straightforward, low-drama option based on both tradition and scientific scrutiny. There’s a kind of reassurance in knowing what’s inside the bottle: a single, well-researched amino acid originally discovered in the same leaves cherished by generations for focus, calm, and quiet moments in busy lives.

    Potential Solutions To Common Issues and How To Buy With Confidence

    Mislabeling and purity worries follow every supplement market, and L-Theanine isn’t immune. Sticking with established brands, not falling for price so low it raises alarms, and checking for third-party certification offers protection. I check for “L-Theanine” (the L- isomer) and scrutinize the supplement facts for unnecessary extras. Skin-in-the-game brands back their claims with independent lab data—a must for anyone watching out for hidden contaminants or exaggerated claims.

    For anyone on prescription medication, open communication with a doctor avoids surprises. I bring new supplements with me during routine check-ups and ask point-blank for guidance. Real dialogue beats guesswork every time. Parents thinking of L-Theanine for their teens, especially for focus or test anxiety, discuss dosing and context with pediatricians. Transparency on all fronts, plus a willingness to experiment with timing and dosage, puts safety and personal well-being first.

    Looking Ahead: Where Does L-Theanine Fit in Wellness?

    Trends come and go, but the core reasons for L-Theanine’s ongoing popularity don’t change much. It fits well next to other evidence-backed ways of managing stress and supporting sleep—deep breathing, going outdoors, eating well, and staying connected to family and friends. L-Theanine offers a practical, low-risk option for rounding out a self-care toolkit. Its understated effect often rewards patience: small, gradual shifts that build up with use.

    A decade ago, green tea’s role in calm focus existed mostly in kitchen rituals and cultural traditions. Now, science has caught up to ancient wisdom, translating ceremonial experiences into careful, measurable, and accessible options. The best L-Theanine products advertise this connection with pride, not with overblown promises or flashy campaigns, but through steady, transparent practice and a real respect for what makes this amino acid special.

    In shops and online marketplaces alike, buyers get more information and choice than ever, but responsibility rests on every shopper’s shoulders. Informed decisions make the difference. Looking for clear labeling, genuine ingredient lists, and real user feedback makes sorting through shelves far easier. Recognizing that supplements serve as tools, not saviors, keeps perspective balanced and realistic.

    Final Thoughts on L-Theanine’s Ongoing Story

    Unlike quick-fix trends, L-Theanine remains relevant because it grows out of both science and lived experience. Its place in my own wellness routine is rooted in quiet reliability, not drama or one-size-fits-all hype. I know what to expect, and I trust it as part of an honest approach to dealing with the brain’s cluttered landscape. The difference it makes for me—and for the many others who’ve shared their stories—lies not in spectacular results, but in a series of small, human-scale improvements that stack up over time.

    True well-being looks different for everyone. For those searching for a gentle boost to calm focus during long days, or a mellow foundation at night when sleep is elusive but responsibilities remain, L-Theanine offers a practical, well-characterized choice worth considering. It’s not a flashy fix, but a steady hand: trusted by scientists, generations of tea drinkers, and anyone ready to take a grounded, well-informed step toward feeling a little more at ease.