Calm Focus and Relaxation Support Without Drowsiness

Promote a calm, clear and relaxed mental state with Pure Encapsulations L-Theanine, a targeted amino-acid supplement featuring clinically researched Suntheanine®.

Each vegan capsule provides 200 mg of L-theanine, an amino acid naturally associated with tea leaves and valued for its ability to support relaxation without causing heavy sedation. L-theanine helps promote healthy alpha-wave activity in the brain, supporting a mental state often described as relaxed, attentive and focused.

Unlike conventional sleep aids or sedating stress formulas, L-Theanine can be used during the day when you want to feel calmer without sacrificing productivity. It may also be incorporated into an evening routine to help the mind transition from activity to rest.

Pure Encapsulations L-Theanine is an excellent option for adults seeking support for occasional stress, calm concentration, caffeine balance, emotional wellness and restful nighttime routines.

Benefits of L-Theanine

L-Theanine supports:

• Relaxation without heavy drowsiness

• A calm and attentive mental state

• Healthy alpha-wave activity

• Occasional stress management

• Calm focus and concentration

• Emotional balance and a healthy mood

• A smoother response to caffeine

• A healthy transition into nighttime rest

• Nervous-system balance

• Healthy cellular function

• Premenstrual emotional wellness

• Long-term stress resilience

What Is L-Theanine?

L-theanine is a naturally occurring amino acid most commonly associated with green tea.

It contributes to the distinctive taste of tea and has been studied for its effects on relaxation, attention and nervous-system activity. Unlike many amino acids, L-theanine is not primarily used to build muscle protein. Its most recognized role is supporting a relaxed but mentally alert state.

L-theanine does not contain caffeine and does not work like a sedative. It supports the neurological processes associated with calm focus, making it useful during both productive daytime activities and evening wind-down routines.

200 mg of Suntheanine® per Capsule

Each vegan capsule provides:

L-Theanine as Suntheanine® — 200 mg

Suntheanine® is a clinically researched form of L-theanine produced through enzymatic fermentation. It is designed to provide a consistent, high-purity source of the same L-theanine naturally associated with tea leaves.

The formula contains no caffeine, green tea extract, sugar, artificial colors or unnecessary active ingredients.

Relaxation Without Heavy Drowsiness

Stress-support supplements often fall into one of two categories: stimulating products intended to increase energy or sedating products intended to cause sleepiness.

L-Theanine offers a different approach.

It supports relaxation while helping preserve normal alertness and mental clarity. This makes it suitable for situations in which you need to remain functional, including:

• Demanding workdays

• Presentations and meetings

• Travel

• Studying

• Social events

• Busy family schedules

• High-pressure projects

• Evening activities

• Occasional stressful situations

Individual responses vary, so new users should understand how the product affects them before driving or completing safety-sensitive tasks.

L-Theanine and Alpha-Wave Activity

Alpha waves are patterns of electrical brain activity commonly associated with wakeful relaxation.

They are often present when a person feels calm and mentally engaged rather than overstimulated or asleep. L-theanine supports healthy alpha-wave activity, helping promote a state of relaxed attention.

This can make it useful for adults seeking to feel:

• Calm but not sedated

• Focused without feeling overstimulated

• Relaxed during demanding situations

• Mentally present

• Better prepared for meditation or breathwork

• Ready to transition from work into personal time

L-theanine is not a treatment for neurological or psychiatric conditions.

Calm Focus and Concentration

Feeling calm and feeling focused are not opposites. Excessive stress and mental tension can make it more difficult to concentrate, prioritize tasks and maintain clear thinking.

L-Theanine supports calm concentration by promoting relaxation without suppressing normal alertness.

It can complement activities such as:

• Focused work

• Reading

• Studying

• Creative projects

• Meditation

• Strategic planning

• Public speaking

• Competitive performance

• Skill-based training

It does not function as a prescription attention medication or stimulant.

L-Theanine and Caffeine

Caffeine can improve alertness, but some people experience unwanted effects such as nervousness, restlessness or feeling overly stimulated.

L-theanine can be used alongside coffee, tea or another moderate source of caffeine to support a smoother, more balanced experience. The combination is popular among people seeking alertness with calm concentration.

L-theanine does not remove caffeine from the body or guarantee protection from:

• Jitters

• Rapid heart rate

• Anxiety

• Digestive discomfort

• Increased blood pressure

• Sleep disruption

Reducing caffeine intake remains the most effective approach when caffeine consistently causes unwanted symptoms.

L-Theanine for Occasional Stress

Stress is a normal response to physical, emotional and environmental demands. The goal is not to eliminate every stress response, but to help the body return to a more balanced state.

L-Theanine supports occasional stress management by promoting relaxation and nervous-system balance without acting as a conventional sedative.

It works best alongside foundational stress-management practices such as:

• Consistent sleep

• Regular exercise

• Adequate nutrition

• Limiting excessive caffeine

• Time away from screens

• Breathwork or meditation

• Healthy work boundaries

• Social connection

• Professional mental-health support when needed

L-Theanine is not intended to treat anxiety disorders, panic attacks, depression or trauma-related conditions.

L-Theanine for Nighttime Wellness

Although L-theanine is not a sleeping pill, its relaxing properties can make it a useful addition to an evening routine.

It may help create a smoother mental transition from daytime activity into rest, particularly for adults who feel physically tired but mentally active at bedtime.

L-Theanine can complement nighttime habits such as:

• Reducing bright light before bed

• Limiting late caffeine

• Gentle stretching

• Breathwork

• Reading

• Meditation

• Maintaining a consistent bedtime

• Keeping the bedroom cool and dark

It does not contain melatonin and does not directly force sleep.

Persistent insomnia, loud snoring, breathing interruptions or significant daytime fatigue should be professionally evaluated.

Emotional and Premenstrual Wellness

Changes in stress sensitivity and mood can occur throughout the menstrual cycle.

L-theanine supports relaxation and a healthy emotional response during periods of occasional tension. It may be incorporated into broader premenstrual wellness routines that include adequate sleep, balanced meals, regular movement and appropriate magnesium intake.

It is not intended to treat premenstrual dysphoric disorder, severe mood changes or another hormonal condition.

L-Theanine and Healthy Aging

Maintaining emotional wellness, sleep quality and cognitive resilience is an important part of healthy aging.

Chronic overstimulation can interfere with exercise recovery, dietary choices, sleep and everyday quality of life. L-Theanine can support a longevity-focused routine by promoting:

• Calm focus

• Stress resilience

• Nervous-system balance

• Restful evening routines

• Emotional well-being

• Consistent recovery habits

• Sustainable daily performance

It can be used alone or alongside other Panther Longevity stress-support products based on individual goals.

Product Highlights

• 200 mg of L-theanine per capsule

• Clinically researched Suntheanine®

• Promotes relaxation without heavy drowsiness

• Supports calm focus and concentration

• Supports healthy alpha-wave activity

• Supports occasional stress management

• May complement moderate caffeine use

• Supports nighttime relaxation

• Caffeine-free

• Melatonin-free

• Produced through enzymatic fermentation

• Available in 60- and 120-capsule bottles

• Vegan

• Vegetarian

• Gluten-free

• GMO-free

• Free from artificial colors and sweeteners

• Free from unnecessary binders, fillers and preservatives

• Free from magnesium stearate

Ingredients

Each vegan capsule provides:

L-Theanine as Suntheanine® — 200 mg

Other ingredients include a vegetarian capsule made from cellulose and water and hypoallergenic plant fiber.

Suggested Use

Adults: Take two capsules, one to three times daily between meals.

Each two-capsule serving provides 400 mg of L-theanine.

Because the full label range can provide a substantial daily amount, many adults may prefer to begin with a lower amount to assess their individual response. Follow personalized guidance when provided by a qualified healthcare professional.

L-Theanine may be taken:

• Between breakfast and lunch

• During an afternoon break

• Before an occasionally stressful event

• Before meditation

• During an evening wind-down routine

• Separately from meals as directed

Do not exceed the suggested use.

Frequently Asked Questions

What is Pure Encapsulations L-Theanine?

Pure Encapsulations L-Theanine is a vegan amino-acid supplement featuring clinically researched Suntheanine®.

Each capsule provides 200 mg of L-theanine to support relaxation, calm focus, healthy alpha-wave activity and occasional stress management without causing heavy drowsiness.

How much L-theanine is in each capsule?

Each capsule provides 200 mg of L-theanine as Suntheanine®.

What is the adult serving size?

The adult suggested use is two capsules, one to three times daily between meals.

Two capsules provide 400 mg of L-theanine.

Should I begin with the full serving?

Individual sensitivity varies.

Adults new to L-theanine may prefer to begin with a lower amount to understand how it affects relaxation, alertness and sleep. Follow professional guidance when taking more than one serving per day.

What is Suntheanine®?

Suntheanine® is a branded, clinically researched form of L-theanine produced through enzymatic fermentation.

It provides a consistent source of the same L-theanine associated with tea leaves without supplying caffeine.

Is L-theanine derived from green tea?

L-theanine naturally occurs in tea leaves, but the Suntheanine® used in this formula is produced through enzymatic fermentation.

The product does not contain caffeinated green tea extract.

What does L-theanine do?

L-theanine supports:

• Relaxation

• Calm concentration

• Healthy alpha-wave activity

• Occasional stress management

• Emotional balance

• A healthy response to caffeine

• Nighttime relaxation

Does L-theanine make you sleepy?

L-theanine promotes relaxation without typically causing heavy drowsiness.

Some individuals may feel more relaxed or tired, particularly when taking larger amounts or combining it with other calming products.

Can I take L-theanine during the day?

Yes. L-theanine is commonly taken during the day because it supports relaxation while helping maintain alertness and focus.

Can I take L-theanine before bed?

Yes. It may be taken as part of an evening wind-down routine.

It does not contain melatonin and is not intended to act as a fast-acting sleeping medication.

Does L-theanine help with sleep?

L-theanine may support restful nighttime routines by promoting relaxation and helping the mind transition toward rest.

It does not guarantee sleep or treat insomnia.

How long before bed should I take L-theanine?

Many customers take it approximately 30 to 60 minutes before beginning their bedtime routine.

Individual timing and responses vary.

Does L-theanine contain melatonin?

No. Melatonin is not included in the formula.

Does L-theanine contain caffeine?

No. L-theanine is caffeine-free.

Is L-theanine a stimulant?

No. It does not function as a conventional stimulant.

It can support mental clarity and attention without producing the same stimulation associated with caffeine.

Is L-theanine a sedative?

No. It is not a conventional sedative.

It promotes relaxation but is not intended to cause heavy sleepiness or impairment.

Does L-theanine help with stress?

Yes. L-theanine supports relaxation and helps moderate the response to occasional stress.

It works best alongside sleep, exercise, nutrition and healthy stress-management habits.

Does L-theanine treat anxiety?

No. L-theanine is not a treatment for generalized anxiety disorder, panic disorder or another mental-health condition.

Adults experiencing persistent anxiety or panic attacks should seek appropriate professional care.

Can L-theanine support mood?

Yes. L-theanine supports emotional balance and a healthy mood during periods of occasional stress.

It is not an antidepressant and should not replace mental-health treatment.

Does L-theanine help with focus?

Yes. It supports a calm, attentive mental state and may be especially useful when stress or overstimulation interferes with concentration.

It is not a substitute for prescription attention medication.

Can I take L-theanine with coffee?

Yes. L-theanine is commonly paired with coffee to support calm alertness and a more balanced caffeine experience.

It does not cancel caffeine or prevent all potential caffeine side effects.

How much L-theanine should I take with caffeine?

There is no universal ratio appropriate for everyone.

Caffeine sensitivity, beverage strength, medications and personal response all affect the ideal combination. Begin conservatively rather than combining a high L-theanine serving with excessive caffeine.

Can L-theanine eliminate caffeine jitters?

It may help support a calmer response, but it does not guarantee that jitters, nervousness or rapid heart rate will disappear.

Reducing caffeine is more appropriate when unwanted effects occur consistently.

Can I take L-theanine without caffeine?

Yes. L-theanine can be used by itself for relaxation, calm focus or nighttime wellness.

Does L-theanine improve meditation?

L-theanine may complement meditation by supporting relaxed attention.

It does not replace the practice itself, but it may help create a calmer state in which breathwork or mindfulness feels more accessible.

Can L-theanine support premenstrual mood?

L-theanine may support relaxation and emotional balance during the premenstrual period.

Severe mood changes, depression or symptoms that significantly disrupt daily life should be professionally evaluated.

When is the best time to take L-theanine?

The best time depends on the intended use.

Common times include:

• During a stressful part of the day

• Alongside morning caffeine

• Before focused work

• Before meditation

• During an evening wind-down routine

• Before bedtime

Why should L-theanine be taken between meals?

Free-form amino acids are often taken between meals to reduce competition with amino acids from dietary protein.

Can I take L-theanine with food?

The suggested use is between meals.

Customers who experience stomach discomfort may need individualized guidance regarding timing.

Can I take L-theanine every day?

Yes. It is formulated for daily use when taken according to the label and individual needs.

Long-term use should be reviewed with a healthcare professional when medications or health conditions are involved.

How quickly does L-theanine work?

Some users notice a calmer mental state within approximately 30 to 60 minutes.

Responses vary according to serving size, stress level, caffeine use and individual sensitivity.

How long do the effects of L-theanine last?

The noticeable duration varies between individuals and may depend on serving size, metabolism and whether it is combined with caffeine or other supplements.

Can I take L-theanine with Magnesium Glycinate?

Yes. The products can complement one another within a stress, relaxation or nighttime-wellness routine.

Because both support relaxation, begin cautiously and monitor your response.

Can I take L-theanine with Cortisol Calm?

Cortisol Calm already contains L-theanine along with ashwagandha, rhodiola and magnolia bark.

Adding a separate L-Theanine product may create unnecessary overlap. Review the total amount and use professional guidance before combining them regularly.

Can I take L-theanine with NAC + Glycine?

Yes. L-theanine provides targeted relaxation support, while NAC + Glycine primarily supports glutathione production and cellular antioxidant defenses.

Glycine can also support nighttime wellness, so monitor for increased relaxation when using the products together.

Can I take L-theanine with Primo Vibes Magnesium Cream?

Yes. Topical Magnesium Cream and oral L-Theanine may be included within the same relaxation routine.

Can I take L-theanine with O.N.E. Multivitamin?

Yes. A multivitamin provides foundational vitamins, minerals and antioxidants, while L-Theanine provides targeted calm and relaxation support.

Can I take L-theanine with creatine?

Yes. Creatine supports strength and cellular energy, while L-theanine supports relaxation and calm focus.

Can I take L-theanine with an energy drink?

It may be combined with caffeine, but energy drinks can contain large amounts of caffeine and additional stimulants.

L-theanine should not be used to justify excessive stimulant intake or mask symptoms such as chest discomfort, palpitations or severe nervousness.

Can I drink alcohol while taking L-theanine?

Both alcohol and calming supplements can affect alertness and coordination.

Avoid combining L-theanine with alcohol until a healthcare professional confirms that the combination is appropriate.

Can I take L-theanine with sleep medication?

Do not combine it with prescription sleep medication, benzodiazepines, sedating antihistamines or other central nervous system depressants without professional approval.

The combination could increase sleepiness or impairment.

Can I take L-theanine with antidepressants?

Customers using antidepressants, mood stabilizers or other psychiatric medications should consult their prescriber before adding L-theanine.

Do not stop or change medication based on supplement use.

Can I take L-theanine with blood-pressure medication?

L-theanine may influence relaxation and blood-pressure responses in some individuals.

Customers taking blood-pressure medication or those who naturally have low blood pressure should obtain professional guidance before use.

Is Pure Encapsulations L-Theanine vegan?

Yes. The active ingredient is produced through fermentation, and the capsule is plant-based.

Is it vegetarian?

Yes. It is suitable for vegetarian diets.

Is L-Theanine gluten-free?

Yes. It is gluten-free.

Is it non-GMO?

Yes. It is GMO-free.

Does it contain dairy or soy?

The finished formula is free from dairy and soy.

Customers with severe allergies should review the current physical label before use.

Does it contain artificial colors or sweeteners?

No. The capsule contains no artificial colors or sweeteners.

Does L-theanine cause side effects?

L-theanine is generally well tolerated.

Possible effects may include:

• Headache

• Dizziness

• Nausea

• Digestive discomfort

• Increased relaxation

• Drowsiness

• Lowered blood pressure

Reduce use and seek professional guidance if significant or persistent symptoms occur.

Can pregnant or nursing customers take L-theanine?

Pregnant or nursing customers should consult their healthcare professional before use.

Can children take Pure Encapsulations L-Theanine?

The product label includes directions for children ages 8 to 18, but pediatric supplement use should be supervised by a pediatrician or qualified healthcare professional.

Who should consult a healthcare professional before use?

Professional guidance is particularly important for customers who:

• Are pregnant or nursing

• Take prescription medication

• Use sleep aids or sedatives

• Take antidepressants or psychiatric medication

• Take blood-pressure medication

• Naturally have low blood pressure

• Regularly consume high amounts of caffeine

• Have a diagnosed medical or mental-health condition

• Are under 18 years old

How should L-Theanine be stored?

Store the bottle tightly closed in a cool, dry place away from direct sunlight, excessive heat and moisture.

Keep it out of reach of children.