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

Based on 13 reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Write a Review Ask a Question
  • Reviews (13)
  • Questions (0)

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!
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.

United Kingdom

L Theanine + Caffeine

Easy and straight forward. Supplements came on time.