Not been using them very long, but very happy with the experience so far
NUYU L-Theanine & Caffeine Capsules for Focus and Energy Support
- 60days in every pack
- 27pa day
- UKmade
- 30day money-back guarantee
What it does
Why people keep taking it.
A well-known pairing
L-theanine and caffeine, two compounds commonly taken together, in one capsule.
From green tea
L-theanine is an amino acid found naturally in green tea leaves.
Take it in the morning
One capsule with water, early in the day rather than near bedtime.
What's inside
Everything it needs. Nothing it doesn't.
- L-Theanine - a naturally calming amino acid from green tea
- Caffeine - to promote mental performance and alertness
- Precision-balanced for calm energy, not chaos
- Designed to support attention and sustained focus
- Ideal pre-work, pre-presentation, or pre-anything
- 60 Capsules / 2 Month Supply
Key actives
Doses you can actually check.
Every active listed with the amount you get per serving - not a proprietary blend.
L-Theanine
FROM GREEN TEA
An amino acid that occurs naturally in green tea leaves.
Caffeine (Caffeine Anhydrous)
A well-known stimulant compound, paired here with L-theanine in a single capsule.
The full ingredient list is just above.
The Clean Nutrition Standard
Made properly, or not at all.
Every NUYU formula is made in the UK to GMP and ISO standards - with no artificial fillers, ever.
GMP manufactured
Produced under Good Manufacturing Practice controls.
ISO certified
Made in an ISO-certified facility.
Made in the UK
Formulated and manufactured on UK soil.
No artificial fillers
Every ingredient is there to do a job.
How to use it
Simple to start. Easy to keep.
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Take 1 capsule daily with water, preferably in the morning or before mentally demanding tasks. Do not take near bedtime.
Do not exceed the recommended daily dose.
What to expect
Supplements work on their own clock.
An honest picture of the first three months, so you know what you're signing up for.
-
Week 1
One capsule in the morning. Avoid it after mid-afternoon if caffeine affects your sleep.
-
Week 4
Use it on the days you need it. Consistency here means sensible timing, not streaks.
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Week 12
Three months on, most people have a clear sense of where this capsule fits their week.
Individual experience varies. Food supplements are not a substitute for a varied and balanced diet.
Complete your stack
Works well alongside
Questions
Everything else you might be wondering.
What does L-Theanine and Caffeine do?
This blend supports mental clarity, alertness, and calm focus - ideal for getting in the zone without the jitters
How is this different from regular caffeine?
The addition of L-Theanine helps smooth out the energy spike, promoting focused calm rather than restlessness or crashes
When should I take it?
Best taken in the morning or before a task that needs sharp focus - like work, study, or a workout
Will it interfere with my sleep?
It may do if taken too late in the day. We recommend avoiding it after mid-afternoon if you’re sensitive to caffeine
Can I stack this with other nootropics?
Yes, it stacks well with adaptogens, B-vitamins, and omega-3s - but don’t overdo total caffeine intake
No-risk trial
Try it for 30 days. If it's not for you, we'll refund you.
No forms, no interrogation. Email us within 30 days and we'll sort it.
- 30-day money-back guarantee
- Free UK delivery over £25
- Skip, pause or cancel a subscription anytime
Subscriptions can be skipped, paused or cancelled at any time.
🎧 Audio Magnesium™
Every NUYU product comes with a soundtrack
Scan the QR code on your pack and press play in the free Audio Magnesium app. Soundscapes, breathwork and guided sessions made to go with your routine, so taking it becomes a moment rather than a chore.
Get the free appExpert feedback
Expert nutritionists we work with.
Mays Al-Ali
BANT Registered Nutritionist, MSc, BSc (Hons) Nutritional Therapist, PgDip CNM, ANP, CNHC
Jo Kelly
Registered Nutritional Therapist & Health Coach, BSc(Hons), dipION, mBANT, mCNHC
Claire Thomas
Registered Nutritional Therapist (BANT, CNHC), BN (Hons), PGCertEd, PGDip, NLP Practitioner & Phlebotomist
Hannah Raynor
Registered Nutritional Therapy Practitioner, BSc (Hons) Nutritional Therapy — Institute for Optimum Nutrition (ION)
