Caffeine (100mg) & L-Theanine (250mg) Capsules


A High Quality 2-in-1 Stack for Energy, Focus and Productivity

Combining Caffeine and L-Theanine forms one of the most popular productivity stacks amongst bio-hackers. You get the focus and attentive benefits of caffeine and also feel the calming, cognitive enhancing effects of L-Theanine, an amino acid found in green tea.

Each of our vegetarian capsules contains 250mg of L-Theanine and 100mg of Caffeine - the recommended ratio for optimal performance.

“... L-theanine and caffeine in combination are beneficial for improving performance on cognitively demanding tasks.” (Journal of Nutritional Neuroscience, 2008

What Is Caffeine & L-Theanine?

We all know what caffeine is; if you don't you have probably been living under a rock for hundreds of years. Caffeine is the number one most popular stimulant consumed by the world's population. It is present in tea, coffee and those crazy energy drinks on the market. It's great for getting us going in the morning but can provide a nasty crash.

L-Theanine on the other hand is not so well known. It is an amino acid that is extremely prevalent in tea; specifically green tea. It has been found to induce calming effects by increasing the production of Alpha waves in the brain. It is also thought to improve focus, concentration and overall cognition by increasing blood flow to the brain.

When combined these two supplements work in synergy to greatly increase productivity. L-Theanine works excellently in reducing the negative side effects associated with caffeine intake - specifically 'jitters' and feelings of anxiousness.

How to take your Caffeine and L-Theanine Capsules

Start with 1 capsule per day, taken in the morning.

Essentially take it whenever you would want to drink a coffee or feel like you need an energy boost. However we would not recommend taking anymore than 3 capsules per day. We also would not advise taking this in the evening if you plan to sleep.

L-Theanine is extracted from Green Tea - and some people purposefully take a lot of it because of it's antioxidants, cognitive enhancing properties and overall nutritional benefits.

Love Drinking Coffee and Just Want L-Theanine?

Try our high strength L-Theanine Capsules

For those of us who love to drink coffee and just want to add L-Theanine to your daily regime - It is available on it's own here.

Our L-Theanine is available in many forms, so as to cater for everybody. We have high strength 400mg capsules, medium strength 250mg capsules or a powder version.

The Focus Supplements Promise

At Focus Supplements we offer only the highest quality supplements. All of our supplements are manufactured in ISO Licensed Facilities within the UK. They are overseen by the very strictest quality control procedures. If you are in anyway unsatisfied, we offer a 100% Money Back Guarantee. We also offer COA's upon request so please do not hesitate to ask.

Customer Reviews

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United Kingdom

2-in-1 CDP Choline (Citicoline) + Uridine Monophosphate Capsules

Delivered fine, and I have no doubt about the quality of the product, however for me personally, I consider the quantities of both the CDP Choline and the Uridine too high. I find its better to buy in powder and experiment with quantities to suit ones personal needs. For me, its about 120mg Uridine and about 90mg of choline


Very good product

Amazing effect!

A Focus Supplements Customer
Giuseppe P.

Grest service

I received all products quickly and well packed. Focus Supplement is a very great choice!

United Kingdom

Theanine plus caffeine

Reallly good product. Improved my sleep and mood. Good quality

Lara D.


Works really good. One capsule gives a good effect