FREE SHIPPING*
UK MADE AND FORMULATED
RECOMMENDED BY DR. SOPHIE BALL
POWERED BY NATURE, BACKED BY SCIENCE
TESTED & MADE IN THE UK FOR PEACE OF MIND
CLEAN-LABEL FORMULA YOU CAN TRUST
REINFORCE COLLAGEN & SKIN VITALITY
STRENGTHEN NATURAL DEFENCES DAILY
Deal ending IN
00 HR
:
00 MIN
:
00 SEC
UK made and formulated, and recommended by Dr Sophie Ball

Inca Naturals L- theanine

450mg High Strength L-theanine with Vitamin B6

99.6% Pure

Calm Focus for Busy Minds

Clear Thinking. Everyday Balance.

Clinically Studied Amino Acid

120 Day Supply per Bottle

WARNING: LOW STOCK NOTICE. This product sold out 12 times last year. We encourage you to take advantage of the limited sale and buy now. Subscribing protects you against future stockouts.

More than 80% of customers also add...

Inca Naturals Soursop Bitters
Inca Naturals Soursop Bitters
£13.99
Inca Naturals Soursop Drops
Inca Naturals Soursop Drops
£13.99
Inca Naturals Soursop Capsules
Inca Naturals Soursop Capsules
£18.99

Choose Your Wellness Path

Tap a goal to get started.

L theanine

Daily Vitality

Antioxidant Defense

Cognitive Focus

Why Your Body Deserves Inca Naturals L-Theanine

Why Your Body Deserves Inca Naturals L-Theanine

Calm Composed Focus;

Supports a more balanced state of mind, helping you stay clear, present and focused throughout demanding days.

High Strength Formula;

Provides 450mg of high purity L-theanine, giving you straightforward, premium-strength formula.

With Vitamin B6

To contribute to normal psychological function and helps reduce tiredness and fatigue.

Mental Clarity without the Heaviness

Designed for those moments when you want to feel settled and focused, without feeling sluggish or switched off.

Effortless Daily Routine

One capsule a day for easy and consistent way to support focus and everyday wellbeing.

Clean, Considered formulation

A streamlined formula with vegan capsules and no unnecessary complexity.

Feature product image

What Makes Inca Naturals L-theanine Special

Formulated and Recommended by Dr Sophie Ball

Inca Naturals

Inca Naturals

VS

Nutrient/Feature

Generic Supplements

Generic Supplements

High Strength 450mg
Nothing Hidden (No Fillers)
Guaranteed Potency & Purity
Includes Vitamin B6
Safe For Long-Term Use
Trusted UK Brand
GMP Certified Facilities
100% Natural & Vegan
1 Capsule Daily
Only Masks Symptoms

The Science Behind L-theanine

L-theanine is a naturally occuring amino acid found predominantly in tea leaves.

  • L-theanineNaturally occurring amino acid found in tea, valued for its distinctive role in supporting a calm, focused state.
  • Alpha Brain WavesL-theanine has been studied for its association with alpha-wave activity, a brain-wave pattern linked with a relaxed yet attentive mental state.
  • High-Strength, High Purity450mg of 99.6% purity L-theanine in every daily serving, combined with Vitamin B6 in one simple capsule
  • A considered formula for busy minds- combining high-strength L-theanine with Vitamin B6 for simple, everyday support.
  • Supports the Immune System

    1. Supports the Immune System

    One of the best-known soursop benefits. Vitamin C and the plants other naturally occurring powerful antioxidants plays an important role in normal immune function.

    Vitamin C helps support the body’s natural defence system by contributing to the normal function of immune cells, including white blood cells. These cells are involved in helping the body respond to everyday immune challenges.

    Soursop’s content also helps protect cells from oxidative stress caused by free radicals. This is one reason soursop is often associated with immune resilience, seasonal wellness and general vitality.

  • Rich in Antioxidants to Combat Free Radicals

    2. Rich in Antioxidants to Combat Free Radicals

    Soursop is naturally rich in antioxidant compounds, including vitamin C, flavonoids, phenolics, tannins and saponins.

    Free radicals are unstable molecules that can damage cells and contribute to oxidative stress. Oxidative stress is associated with ageing, environmental stress, pollution exposure and many long-term health concerns.

    The antioxidants found in soursop help neutralise free radicals and protect cells and tissues from oxidative damage and oxidative stress. This is one of the strongest benefits of soursop.

    This makes soursop especially relevant for healthy ageing, daily vitality, cellular protection and modern-life wellness.

  • Cellular Health

    3. Cellular Health

    Soursop is widely studied for its naturally occurring plant compounds, particularly annonaceous acetogenins, flavonoids and phenolic compounds.

    Acetogenins are among the most talked-about compounds in soursop. Laboratory and animal studies have explored their biological effects, including how they interact with abnormal cell lines.

    Some studies have looked at soursop extracts in relation to:

    • Breast cancer cell lines
    • Colon cancer cell lines
    • Prostate cancer cell lines
    • Lung cancer cell lines
    • Pancreatic cancer cell lines

    Important: Soursop is not a cure for cancer, does not replace medical treatment.

  • Contains Anti-Inflammatory Compounds

    4. Contains Anti-Inflammatory Compounds

    Soursop has traditionally been used for discomfort, swelling and inflammatory-type conditions. Research has also explored anti-inflammatory activity.

    Chronic inflammation, such as arthritis, gout, rheumatism, heart disease and other long-term health issues. Some compounds in soursop have been studied for their ability to influence inflammatory pathways.

    Traditional and early research has explored soursop in relation to:

    • Arthritis
    • Gout
    • Rheumatism
    • Osteoarthritis
    • General pain and swelling

    Why this matters: Soursop contains antioxidant and plant compounds that may help support a healthy inflammatory balance.

  • Supports Digestive Health

    5. Supports Digestive Health

    Your digestive tract is far more than a place where food is broken down. It is one of the body’s most important foundations for whole-body health.

    It influences nutrient absorption, immune function, energy levels, skin health, mood and everyday vitality. When digestion is working well, your body is better able to absorb the nutrients it needs, support natural defences, maintain energy metabolism and feel balanced from the inside out.

    Whole soursop fruit supports regular bowel movements and helps reduce the likelihood of constipation.

    Soursop can also act as a prebiotic, meaning it helps feed beneficial bacteria in the gut microbiome. A healthy gut microbiome is linked with nutrient absorption, immune function, regular digestion and even mood regulation.

  • Antibacterial and Antiparasitic Effects

    6. Antibacterial and Antiparasitic Effects

    Soursop has been traditionally used in some cultures for infections, bacteria and parasites.

    Laboratory studies have investigated antimicrobial, antibacterial and antiparasitic activity from different soursop.

    Certain compounds, including quinolones, alkaloids, acetogenins and essential oils, have been studied for their ability to inhibit the growth of some microbes.

  • Supports Healthy Skin

    7. Supports Healthy Skin

    Soursop may support healthy skin because it contains vitamin C and antioxidant compounds.

    Vitamin C contributes to normal collagen formation, which is important for the normal function of skin. Collagen helps maintain skin structure, firmness and elasticity. Antioxidants also help protect skin cells from oxidative stress caused by pollution, UV exposure and other environmental factors.

  • Help Reduce Stress Load and Support Mood

    8. Help Reduce Stress Load and Support Mood

    Many traditional practices use soursop, for relaxation, stress, anxiety and sleep. The fruit also contains B vitamins.

    B vitamins play roles in energy metabolism and nervous system function.

    Stress increases hormones such as adrenaline and cortisol. These hormones are essential in the short term, but chronically high stress can affect sleep, mood, energy, anxiety levels and general wellbeing.

    Soursop may have calming, nervine properties.

  • Excellent Source of Natural Energy

    9. Excellent Source of Natural Energy

    Soursop fruit contains natural carbohydrates, which provide energy. Soursop also contains fibre, which slows sugar absorption and supports a steadier release of energy.

    Soursop also contains B vitamins, including thiamine, riboflavin, niacin, pantothenic acid and vitamin B6. These nutrients are involved in converting food into energy.

    The high levels of Vitamin C contributes to normal energy-yielding metabolism and reduction of tiredness and fatigue.

  • Traditionally Used for Sleep and Insomnia

    10. Traditionally Used for Sleep and Insomnia

    Soursop has been used various cultures to promote relaxation and restful sleep. This is linked to the plant’s traditional sedative and nervine uses.

    Soursop also has been studied containing compounds such as tryptophan, which is a precursor to serotonin and melatonin, both involved in mood and sleep cycles.

  • Kill and Flush Parasites

    11. Kill and Flush Parasites

    Acetogenins, one of the active compounds in soursop, shuts down ATP production, the fuel conversion process parasites depend on to turn your food into energy.

    The parasites then starve from the inside out, and get flushed from your body.

The Inca Naturals Promise

Two core brand values are trust and quality which is why everything we do is built on a foundation of excellence and transparency. Our products are:

Image Placeholder

3rd Party Tested

Image Placeholder

99.6% Pure L-theanine

Image Placeholder

Trusted UK Brand

Image Placeholder

Quality without compromise

Product description goes here.

What To Expect With Daily Use

30-60 Minutes
30-60 Minutes
A calmer, more settled feeling while staying alert and focused.
1-3 Hours
1-3 Hours
Smoother concentration during busy or mentally demanding periods, without feeling heavy or drowsy.
During the Day
During the Day
A more composed response to everyday mental pressure, helping you stay clear-headed when demands build.
With Consistent Use
With Consistent Use
A simple daily routine to support calm focus, alongside Vitamin B6 for normal psychological function and reduced tiredness and fatigue
Month 12
Month 12
This is who you are now. Clearer, calmer, more focused. People notice the difference- you're showing up as the version of yourself that feels more composed and in control.Energy, mood, rhythm settle.
Icon
Choose Your Bundle
Select a package below to add it to your cart.
1 Bottle
£24.99

Frequently Asked Questions

Got questions? We've got answers to help you taste the tropics.

What are the main benefits of Inca Naturals L-theanine Capsules? +

Our L-theanine formula has been created for modern, busy minds- helping you build moments of calm and focus into your day without the heavy, sedating feel associated with some relaxation products. With 450mg of high purity L-theanine plus Vitamin B6, which supports normal psychological and nervous-system function and helps reduce tiredness and fatigue, it is designed to fit effortlessly into your daily routine.

What is inside each capsule? +

Each vegan capsule contains our premium L-theanine fortified with Vitamin B6. We use 100% organic, sustainably sourced L-theanine with absolutely zero artificial additives or synthetics.

Are these capsules vegan-friendly? +

Yes! Our capsules are 100% vegan and contain only pure, earth-grown ingredients.

How many capsules are in a bottle, and how long will it last? +

Every bottle contains 120 vegan capsules. With the recommended daily serving, one bottle provides a full 4-month supply.

Where is Inca Naturals L-theanine made? +

Our L-theanine capsules are experly manufactured in China by a specialist and very much trusted supplement GMP-certified manufacturer, selected for its technical expertise and high manufacturing standards. It is produced to our exact specification, with stringent quality controls and batch testing in place to help ensure purity, consistency and quality.

Can I mix the capsules into my food or drinks? +

Absolutely. While they are easy to swallow on their own, many of our customers love opening the capsules and blending the tropical, antioxidant-rich powder directly into their morning smoothies!

What is your return policy if I don't love it? +

We want you to enjoy your tropical mini-vacation risk-free. That is why we offer a 100% Money-Back Guarantee. If you aren't completely satisfied with your purchase, simply contact us within 30 days for a full refund.