L-Theanine 200mg + Caffeine 100mg
The scientifically validated 2:1 theanine:caffeine ratio. Calm, sustained focus without jitteriness or crash. Effective in 30 minutes.
What does optimal health cost per day?
Less than a coffee top-up. Optimal nutrition for 25p/day — the most cost-effective investment in your health.
Free Vitamin C 1000mg with orders over £40
While stocks last · auto-added at checkout
Supply size
Most customers reorder this monthly. Each pack lasts ~30 days.
Subscribe and save 15% — never run out. Switch to subscription
Your daily health investment
£0.37
per day
£2.59
per week
£10.99
per month
Less than a daily coffee — for daily nutritional support from L-Theanine 200mg.
Auto-delivered. No minimum term. Cancel any time.
Price locked forever — we never raise your subscription price. Cancel any time, no fees.
Bundle and save up to 20%
Add 2+ products to your stack — discount applied automatically at checkout.
Not ready to commit? Try a 7-day sample pack
Only £2.99 — credited toward your first full order
Group buy — save up to 30%
Limited spotsPool orders with other L-Theanine buyers. The more people join, the more everyone saves. Next group buy runs when we hit 50 registrations.
📦 What to expect when it arrives
Premium box
Double-sealed. No cheap poly bags — every Medibro order ships in a quality box.
Amber glass
UV-protective amber glass preserves potency. Satisfying click-lid seal.
Little extras
Every first order includes a usage guide and a surprise freebie — see what you get.
Start today
Take your first dose the day it arrives — don't wait for a 'perfect moment'.
Your 30-day journey starts today
Future you will look back on this moment.
Based on typical customer reports. Individual results vary. Backed by our 30-day guarantee.
Premium packaging, inside and out
Amber glass jar
Blocks UV degradation, no plastic leaching
100% recyclable
Jar, cap, and box are fully kerbside recyclable
No artificial fillers
No magnesium stearate, silicon dioxide, or titanium dioxide
- Free UK delivery over £35
- 14-day hassle-free returns
- Secure checkout, audit-logged
- Manually compliance-reviewed
Order dispatched, tracking info sent. Most customers take their first dose the day it arrives.
Research shows it takes ~14 days to anchor a new habit. By now, most customers have found their ideal time of day.
At 8 weeks, customers report the strongest improvements. Consistency is everything with nutritional supplements.
Over 90% of Medibro subscribers are still on the same product at 3 months — the clearest signal a supplement is working.
L-Theanine and caffeine are the most studied nootropic combination available. A 2008 RCT (Owen et al.) found the combination significantly improved attention, alertness, and task performance vs caffeine alone or placebo — while reducing caffeine's anxiety-inducing side effects.
Suntheanine® L-theanine is produced by enzymatic synthesis to >99% purity — the same form used in clinical trials.
Benefits
- ✓Focus
- ✓Calm
- ✓Alertness
- ✓Reduced anxiety
- ✓Cognitive performance
Dosing Guide
How to take L-Theanine 200mg + Caffeine 100mg
Take 1 capsule 30–45 minutes before tasks requiring focus. Do not take within 6 hours of intended sleep time. Limit to 2 capsules per day.
Always read the label. Consult a healthcare professional if you have any medical conditions or take prescription medication.
Quality & transparency
How we compare
Medibro vs. typical high-street / marketplace alternatives
| Feature | Medibro | Others |
|---|---|---|
| Ingredient quality | Premium grade | Generic grade |
| Third-party tested | ||
| No unnecessary fillers | ||
| UK manufactured | ||
| 30-day guarantee | ||
| Free UK shipping from £35 |
Customers like you also explore
⏰ How to take for best results
Best time
With food, once daily
Take with
Water or a meal
Avoid with
No specific interactions — check with your GP if on medication
Consistency is key. Take at the same time each day to build habit and maximise benefit.
Frequently asked questions
Find your perfect supplement stack
Answer 4 quick questions and get a personalised stack built around your goals, health history, and lifestyle.
Medibro Quality Score™
Independent assessmentPurity
92
Overall
out of 100
Potency
Value
How we compare
Medibro | Budget | Pharmacy | |
|---|---|---|---|
3rd-party COA testing | |||
Premium forms (glycinate, KSM-66, TG omega) | |||
Full ingredient transparency | |||
UK pharmacist reviewed | |||
No proprietary blends | |||
30-day money-back guarantee | |||
Eco-friendly packaging |
Comparison reflects general market observations. Specific brands may vary.
What outcomes matter most to you?
Founded by a UK pharmacist
“After 12 years dispensing prescriptions, I was frustrated by the gap between expensive supplements and what the evidence actually supports. Medibro was built to source properly — clinical doses, verified purity, fair prices.”
— MPharm, GPhC registered · Medibro founder
Every formula is reviewed by our in-house pharmacy team before launch.
Stack Synergies
Science-backed pairings for better results
The most studied nootropic stack — L-theanine blunts anxiety and jitters while amplifying caffeine's focus
Ashwagandha's adaptogenic cortisol reduction pairs perfectly with L-theanine's GABA-modulating calm
L-theanine + magnesium glycinate is a leading evidence-based sleep-onset stack
Synergies based on published nutritional science. Individual results may vary. Always consult a healthcare professional before combining supplements.
Complete your stack
✨What customers say
From 20 reviews★ 4.8Customers appreciate the effective combination of L-theanine and caffeine, which provides clean, sustained energy without jitters or crashes, enhancing focus and productivity during demanding tasks.
Some users wish the product was available in larger quantities, and a few noted that it takes 30-45 minutes to feel the effects, which could be longer than expected.
This product is ideal for students, remote workers, and anyone needing improved focus and cognitive performance without the anxiety associated with traditional caffeine consumption.
Customer reviews
- ★★★★★Anna S.02/05/2026Perfect pre-work focus stack
The combination of L-theanine and caffeine is well-researched and the 2:1 ratio here is exactly right. I get the alertness of caffeine without the jitters or anxious edge. Superb for morning focus.
- ★★★★☆Amy N.29/04/2026Great for studying
As a postgraduate student, focus is everything. This combination helps me sustain concentration during 3–4 hour study blocks. No tolerance issues after 2 months of use.
- ★★★★★Ian C.25/04/2026Smart caffeine use
This is how caffeine should be consumed. L-theanine smooths the peak and trough, delivering steady, clean alertness for hours. Very effective and no negative side effects whatsoever.
- ★★★★★Mel C.24/04/2026No more caffeine anxiety
I love the energy boost of caffeine but hate the jitters. This solved that entirely. The theanine takes the edge off while preserving the alertness. I'll never take caffeine alone again.
- ★★★★★Karen B.18/04/2026Stress-free energy boost
Unlike straight caffeine, this gives me energy without the stress response. My productivity has improved markedly since switching from coffee to this combination. Highly recommend.
- ★★★★★Jess T.16/04/2026Clean, smooth energy
No jitters, no crash, just clean sustained focus for 4–5 hours. The theanine really does smooth out the caffeine effects. I use this before any mentally demanding work.
- ★★★★☆Steve B.07/04/2026Does exactly what it promises
Clean cognitive enhancement without side effects. I take it before any demanding creative work and notice a genuine improvement in focus and sustained concentration. Would buy again.
- ★★★★★Paul J.29/03/2026Best cognitive supplement value
At this price point for 200/100mg dosing, this is outstanding value. Clean ingredients, correct ratio, real effects. I've recommended it to all my colleagues.
- ★★★★★Carl B.23/03/2026Replaced my third coffee
I was drinking 4 cups of coffee a day and getting caffeine crashes. Replaced my afternoon coffee with this stack instead. Cleaner energy, no crash, better focus for afternoon work.
- ★★★★☆Diane P.19/03/2026Works quickly and reliably
Takes about 20 minutes to kick in. I use it before any task that requires sustained focus. The effects are real — improved attention span and significantly less mental fatigue during long sessions.
- ★★★★☆Tara S.12/03/2026Consistent daily performance
Three months of daily use. I take it with breakfast and it sets me up for a focused morning. No tolerance build-up that I've noticed. Good quality product.
- ★★★★★Josh L.03/03/2026The best way to take caffeine
If you use caffeine for performance, you should be combining it with L-theanine. The synergy is well-documented. Medibro's capsules are convenient and the dose is exactly what the research recommends.
- ★★★★★Kim R.24/02/2026Excellent for remote work focus
Working from home makes it hard to stay in the zone. This stack has become essential for my morning routine. I'm more productive and focused without the anxiety spike I get from coffee alone.
- ★★★★★Rob K.21/02/2026Better than caffeine alone
I've always been sensitive to caffeine. Taking L-theanine alongside it removes the anxious edge completely while keeping the mental sharpness. This ratio (200mg:100mg) is ideal.
- ★★★★★Rachel T.21/02/2026Brilliant combination
The 200mg theanine to 100mg caffeine ratio is the gold standard for cognitive enhancement. These capsules deliver that exact ratio cleanly. I'm sharper, calmer, and more productive.
- ★★★★★Nick W.19/02/2026Finally found my focus supplement
Tried many nootropics over the years. The evidence for L-theanine + caffeine synergy is the strongest of anything I've tried. These capsules are good quality and the price is very reasonable.
- ★★★★★Pete H.18/02/2026A daily must-have
I've taken this combination for 6 months now. Consistent, reliable focus enhancement with no negative side effects. The capsules are easy to swallow and the dose is correctly proportioned.
- ★★★★★Ryan M.Verified buyer02/02/2026Perfect nootropic stack
The 2:1 theanine:caffeine ratio is the golden ratio for clean focus. No jitters, no crash, just calm alertness. Replace my afternoon coffee with this and my productivity is noticeably better.
- ★★★★☆Liam O.Verified buyer30/12/2025Good focus supplement
Works well for studying. The combination is definitely superior to caffeine alone. Takes about 30-45 minutes to kick in. Would give 5 stars but I wish it came in larger quantities.
- ★★★★★Charlotte E.Verified buyer24/11/2025Works exactly as advertised
Anxious coffee drinker here. Theanine plus caffeine is genuinely a better combination than caffeine alone. The calming effect balances the caffeine stimulation perfectly. Focus without anxiety.
Questions & answers
Loading…
Have you tried this product?
Log in to write a review