Caffeine (150mg) and L-Theanine (300mg), 2-in-1 Productivity and Focus Stack


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Regular price £24.99

Includes free 2-3 day tracked shipping to UK addresses!

The most powerful Caffeine and L-Theanine on the market with the MAXIMUM effective dosage of L-Theanine (300mg)

Try one of the most popular productivity stacks out there... Caffeine and L-Theanine. These 2-in-1 premade capsules contain 150mg of Caffeine and 300mg of L-Theanine - the optimal 1:2 ratio and at maximum strength for calm but determined focus to get things done.

What you get in each capsule of Caffeine and L-Theanine:

  • 150mg of Caffeine - Pure caffeine increases alertness and focus. 150mg is the same amount of Caffeine that you would get in a Starbucks Grande Latte.
  • 300mg of L-Theanine - Too much caffeine pushes you over the edge and gives you those "caffeine jitters". L-Theanine is the relaxing amino acid found in green tea, and has been found to counter-act the jittery side-effects of stimulants like Caffeine. Taking them both together typically gives a feeling of a calm but determined focus to get things done.

What makes our Caffeine and L-Theanine so special?

  • The maximum effective dosage - Taking more than 300mg of L-Theanine starts to give diminishing returns when combined with 150mg of Caffeine. Taking less would not be taking enough. 300mg of L-Theanine = Just perfect.
  • 120 capsules per bottle (4 months supply) - Each bottle contains 120 vegetable capsules, a 4 months supply if you take one per day.
  • Vegetable capsules not gelatin capsules - Slightly more expensive? Yes... But we'd rather go with the natural option, which is easier on your digestive system and GMO free.
  • No fillers or bulking agents - Each capsule only contains the two above active ingredients.


shipping policy of Lifetropics


  • There is no hassle. You don't even have to return anything to us. If you don't love your supplements for any reason, simply get in touch by phone or email and let us know you'd like a refund within 30 days from ordering. That's it.
  • Although it is rare, if your parcel goes missing (which is pretty much impossible via a tracked courier), we can also find out where it went and send you a replacement.