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


A Quality 2-in-1 Stack for 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 effects of L-Theanine, an amino acid found in green tea.

Each vegetarian capsule of this stack 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

A quality stack made in an ISO licensed UK facility

We always want to be able to offer the highest quality supplements available.

Your 4 month supply in a single bottle

Each bottle contains 120 high-strength capsules combining both 250mg of L-Theanine and 100mg of Caffeine.

Delivered in 1-3 days to your door

We will send this out to you the same day if you order before 1pm. Delivery typically takes 1-3 days if you live in the UK or 3-7 days if you live in Europe.

100% money-back guarantee

If you don't like it, you don't have to pay for it. Most people are really happy with the quality of this stack - you can check out iits reviews below.

How to take your Caffeine and L-Theanine Capsules

Start with 1-2 capsules per day

But note that there's no real "maximum limit". Essentially take it whenever you would want to drink a coffee.

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

Love Drinking Coffee and Just Want L-Theanine?

Get our high quality and pure L-Theanine on its own

For those of us who love to drink coffee and just want to add L-Theanine to it - you can also buy L-Theanine on its own on our store in capsule and powder form.

Customer Reviews

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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


Good product and pricing adds value!

Was drawn to this product to have a more reliable source of caffeine intake combining L-Theanine with caffeine. Packaging was secure: arrived in a bubble-wrap envelope. My only suggestion is that the L-Theanine might be more optimally dosed in a 2:1 ratio to allow more of the caffeine stimulant effects to be felt especially considering a tolerance to caffeine is quickly built in most people over time. Other than that I liked the quality, presentation, delivery time (less than a week within EU) and effortless transaction with FocusSupplements. I can definitely recommend this product from you to others!

Miha K.

Great alternative of coffe

Free shipping to Slovenia! Yaaay <3 If you are looking for alternative and upgrade of your morning coffee - this is it! The product is of great quality and the price is fair. I love the quality and design of the bottle. Delivery was almost on time (one day late), but the outer box packaging came a bit damaged, because its send in an air bubble envelope, but technically it doesn't matter for me.