Focus & Productivity Stack

BBuilding confidence

Worth a test run.

Medium commitment7 steps · 5 supplements · 2 habits

Latest evidence update: 2026-12-01

What this protocol does

Targeted nootropics and work habits for deep focus, creative output, and sustained mental energy throughout the workday.

What to expect

Synthesized from research on this protocol's components. Individual response varies.

Week 1

Look for: Sharper focus and faster info processing within hours of dosing — caffeine plus L-theanine produces moderate effect sizes for attentional switching and alertness within the first two hours, and tyrosine acutely improves information processing speed under demanding situational conditions.

Not yet expected: Big effects on raw sustained attention from caffeine plus L-theanine — effect sizes are smaller for unisensory and multisensory attentional outcomes.

Backed by 2 studies

Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis.
Tyrosine supplementation mitigates working memory decrements during cold exposure

Note: Claims here are mostly for acute (within-hours) effects of nootropic combinations. Cumulative weekly benefits from L-tyrosine, alpha-GPC, and Lion's Mane are not directly characterized in our research database.

Expected outcomes

Research outcomes from 1 supplements and habits (3 data points)

Outcome estimates are derived from published research and represent population-level associations, not guaranteed individual results. Consult a healthcare professional before making decisions based on these estimates. Combined effects account for shared biological mechanisms between interventions.

Protocol steps

CaffeinesupplementASolid confidence

90 min after waking · 100mg

Adenosine blockade — sharp alertness boost

L-TheaninesupplementBBuilding confidence

With caffeine · 200mg

Removes caffeine jitteriness — smooth, sustained focus

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Order these supplements

Get everything you need for this protocol delivered to your door.

Caffeine

L-Theanine

Alpha-GPC

Lion's Mane

L-Tyrosine

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Questions about Focus & Productivity Stack

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Research behind the components

Aggregated from the supplements and habits in this protocol; not a composite protocol grade · 399 studies referenced

Referenced studies (399)

ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.