caffeine that fits the moment
workflow pairs 20 mg caffeine from guarana with 40 mg l-theanine in each gummy. smaller increments let you choose your caffeine amount for the moment, with the pairing built into every piece.
choose pineapple yuzu or blood orange mango. both flavors are vegan, made with pectin, and come in a resealable pouch of 40 gummies. each gummy contains 2 g sugar.
what does sustained attention mean?
sustained attention is the ability to keep attending as a task continues. it becomes a different question from how quickly you answer one prompt or how well you change between two rules.
think of checking a long list for occasional exceptions. the important event may be rare, and the repeated action can become familiar. a laboratory task creates a consistent version of that challenge so researchers can track performance over time. it does not recreate every interruption or decision in a working day.
inside a two-hour attention study
foxe and colleagues tested 27 participants on a sustained attention to response task during four separate two-hour sessions. each session used 50 mg caffeine, 100 mg l-theanine, the combination or placebo in a randomized, double-blind crossover design.
errors increased over time with placebo. caffeine and l-theanine conditions reduced errors, but the combination did not add a further benefit over either ingredient alone at these amounts. the separate conditions make this especially useful when asking whether two ingredients always outperform one.
why the length of the test matters
this trial followed performance over two hours, making it relevant to attention during an extended task. the amount, task and duration are shown alongside the results.
when planning a session, define the result you want: checking a list accurately, finishing a draft or working through a set of calculations. these are different tasks. matching the research outcome to the question makes “longer focus” more specific.
is l-theanine alone relevant to attention?
a 2026 meta-analysis of 31 randomized trials reported a short-term benefit in choice reaction time after a single 200 mg l-theanine dose. that is another attention-related finding, but it is a different outcome and dose from the two-hour trial.
the review did not find a significant fatigue effect. attention performance, feeling less tired and getting more work done should stay separate when interpreting a headline.
plan the session before the caffeine
make the task concrete: what are you trying to finish, what counts as an error and when will you pause to check the work? an endpoint makes “focus for longer” a clearer goal than an open-ended attempt to stay at a screen.
a practical setup to try is one task, the materials needed for it and a planned point to reassess. keep a separate note of caffeine amounts and timing if you use it.
[ TAKE IT WITH YOU ]
bring your attention back to what you want to finish
[ GOOD QUESTIONS ]
a little more clarity
is staying attentive the same as not feeling tired?
no. task performance and self-reported fatigue are different outcomes. a change in one does not automatically establish a change in the other.
how much caffeine and l-theanine is in each gummy?
each workflow gummy contains 20 mg caffeine from guarana and 40 mg l-theanine. both flavors use the same core formula, with 40 gummies per pouch.
sources & further reading
the linked studies examine these ingredients at the amounts shown. workflow’s per-gummy formula is listed separately.
written by workflow. follow the product label. send a question or correction.
