Short answer: Pocketday Energy’s current product listing states that one strip contains 50 mg caffeine, 30 mg L-theanine, and 1,000 mcg vitamin B12 as methylcobalamin. Those label amounts describe the formula; by themselves, they do not establish a particular effect, synergy, safety outcome, or how the strip is absorbed.
This guide explains how to read those amounts and how to compare ingredient research with a finished product. It is educational information, not personal medical or dosage advice.
What the Pocketday Energy label lists
- Caffeine: 50 mg per strip
- L-theanine: 30 mg per strip
- Vitamin B12 (methylcobalamin): 1,000 mcg per strip
- Serving: one strip; 30 strips per tin
These are facts shown on the current Energy Strips product page. Labels can change; check the current package for the product you have.
What ingredient research can—and cannot—tell you
Researchers have studied caffeine and L-theanine in combinations, but studies can differ from a store product in dose, ingredient form, delivery method, participants, and task measured. For example, the small 2008 study summarized in the PubMed record included a 50 mg caffeine plus 100 mg L-theanine condition. Pocketday’s listed L-theanine amount is 30 mg, and the study did not test this dissolvable strip.
A 2012 study used a different 50 mg caffeine/100 mg L-theanine comparison (PubMed record). The 2025 systematic review combined research across varied preparations and doses (PubMed record). These sources provide background on what researchers have examined; they do not establish the effect of Pocketday’s 50/30 mg formula.
When you read any ingredient study, compare the ingredient form, amount, route or format, participants, duration, and outcome with the product and question you care about. If those details differ, treat the study as context rather than proof about the finished product.
Why the numbers do not answer every question
An ingredient list tells you which ingredients and amounts the maker reports for a serving. It does not, on its own, show whether a combination has a specific effect, whether a delivery format changes absorption, or how an individual will respond. A product-specific conclusion requires evidence that matches the actual formula and question.
For general background on caffeine, see the FDA’s caffeine information. It is general guidance, not a product-specific assessment or individual recommendation. For label-reading basics, visit our supplement-strip label guide. For practical format questions and limits, read our dissolvable-strip guide.
Frequently asked questions
Does listing caffeine and L-theanine together prove that the combination works a certain way?
No. The listing identifies the ingredients and amounts. It does not establish a particular result from the finished product.
Can I compare a study directly with this product?
Only after checking the study’s amounts, ingredient forms, delivery method, participants, and outcome. The examples above used different L-theanine amounts or combined varied preparations, so they do not test Pocketday’s listed formula.
Does a dissolvable strip label show how quickly an ingredient is absorbed?
No. A label and the fact that a strip dissolves do not establish absorption rate or bioavailability. Those questions require measurements on the relevant ingredient and formulation.
About Pocketday Research Desk
Pocketday Research Desk is the editorial and research team at Pocketday Labs. We compare product wording with current label facts and identify where the available research does not match the product or question.