Caffeine + L-Theanine.

The gap this formula speaks to.

Public health figures the engine matched to this formula's ingredients. Reported by their source, cited and dated, never written by the brand.

Population figures from public health data. Context for the category, not a statement about any individual and not a claim about this product.

Every one of these is a fact the engine could ground.

Each line below was derived from this formula's own record at the time of verification. Nothing here was written by the brand, and nothing can be added that the evidence does not carry.

• Studied in people14 human studies on L-Theanine back this formula, each one cited.
• A mechanism that is settledHow Caffeine Anhydrous and L-Theanine work is settled pharmacology.
• Studied together, not just separatelyCaffeine Anhydrous and L-Theanine have been studied together, not only separately.
• Recent work on the recordThe most recent study on this record was published in 2024.
• Serving amount inside the studied rangeEach serving carries 100 mg of L-Theanine, inside the range the published research used.
• A stated daily maintenance amountL-Theanine is here at a daily maintenance amount, which is what a daily supplement is for.
• Why this formatIt is a capsule, so the amount per serving is fixed and travels without measuring.
• The exact form, describedThe label names its forms exactly: Caffeine anhydrous, L-theanine. The record says what each one is and what it suits.
• Full label disclosureEvery ingredient on this label carries its own declared amount.
• Where it comes from and how it is madeCaffeine Anhydrous is made by more than one route.
• Positions this formula already qualifies forThis formula already qualifies for positions beyond the one it is sold into, on the evidence it carries.
• A position nobody is holding yetSome of those positions are ones almost nobody is selling to yet.

What the trials show about timing.

Time-to-effect windows the engine read from the trial record. Each is a window a named study measured, cited and dated, never written by the brand.

• Caffeine Anhydrouswithin about 45 to 60 minutes of a single doseMeasured within a day

  In a double-blind placebo-controlled crossover trial, 15 resistance-trained women took 4 mg per kg body mass of caffeine 60 minutes before a strength and power battery. Squat one-repetition maximum rose 4.5 percent and countermovement jump height 7.6 percent against placebo. A separate crossover trial in 11 active adults began its cycling tests 45 minutes after a 3 mg per kg capsule and recorded a peak-power increase of about 4 percent on the first day of ingestion.

  Norum et al., 2020PMID 32681596

  Lara et al., 2019PMID 30673725

  Promising
• Caffeine Anhydrousheld for about 15 to 18 days of daily use, then narrowedBuilds with daily use

  One crossover trial mapped the day-to-day time course in 11 healthy active adults taking 3 mg per kg per day for 20 consecutive days. Peak cycling power in the incremental test stayed about 4.0 percent above placebo for the first 15 days and the difference then lessened. Wingate peak power was still raised on days 1, 4, 15 and 18 by about 4.9 percent. The authors describe the shrinking margin as progressive tolerance. This is one trial with 11 participants.

  Lara et al., 2019PMID 30673725

  Early
• L-Theaninewithin about 45 to 50 minutes of a single doseMeasured within a day

  Two double-blind placebo-controlled crossover trials measured attention at a fixed interval after one oral dose. In 24 overnight sleep-deprived adults aged 20 to 25, a 200 mg dose tested 45 minutes post-dose reduced false alarms on a traffic-scene recognition task and raised target-distractor discriminability. In 27 healthy young adults tested 50 minutes post-dose, 400 mg shortened the parietal P3b event-related potential latency against placebo, with no significant change at 100 or 200 mg. Both trials measured task and electrophysiological markers, not a subjective feeling.

  Karunaratne and Dassanayake, 2024PMID 39052627

  Dassanayake et al., 2020PMID 32777998

  Promising

Windows measured in the cited trials. Context for how the active behaves over time, not a statement about any individual and not a claim about this product.

How each ingredient usually behaves over time.

Two ingredients, from each one's own page.

• Caffeine AnhydrousAbout five minutes

  Fifteen to forty five minutes for most people, peaking around the hour. How long it lasts depends on liver enzyme activity and varies several fold between people.

  Its own page, the plain answer on timing ↗

• L-TheanineThirty to sixty minutes

  For most people, with blood levels peaking inside the first hour. Nothing accumulates, so each dose stands on its own.

  Its own page, the plain answer on timing ↗

How each ingredient usually behaves over time, from its own page on IngredientMD. General timing for the ingredient, not a measurement of this product.

The same ingredient, carried differently.

What each form is, and where it fits in a formula. Measured findings carry the study that reported them.

• Caffeine anhydrous

  Dry crystalline free base with no water of crystallisation, close to a hundred percent caffeine by weight

  Fits

  Capsules, tablets and pre-workout powders where an exact milligram figure is needed

  Trade-off

  Potency by volume makes it unforgiving to measure by spoon and it dissolves slowly in cold water. The same potency is what makes accurate dosing possible on a scale

• L-theanine

  The single L-enantiomer as a free amino acid, the form found in tea leaf and the form used in essentially all human trials.

  Fits

  Anyone matching what the trial literature actually tested, and anyone formulating with caffeine.

  Trade-off

  Hygroscopic powder with a faint umami taste that can come through in unflavoured drink mixes.

Descriptions of the form itself, read from the cited studies. Not a comparison between products and not a statement about any individual.

Capsule

It is a capsule, so the amount per serving is fixed and travels without measuring.