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Does paraxanthine provide greater improvement in cognitive function than caffeine or in combination with caffeine prior to and following running?

Effects of ParaXanthine supplementation with and without CAffeine on executive Function (PXCAF)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN14506218
Enrollment
13
Registered
2022-01-04
Start date
2020-01-01
Completion date
Unknown
Last updated
2024-05-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Executive functioning in healthy individuals Not Applicable

Interventions

Subjects consume capsules containing 400 mg of placebo (PL)
or 200 mg of PL + 200 mg of caffeine (CA)
or 200 mg of PL+ 200 mg of PX (ENFINITY™, Ingenious Ingredients, Lewisville, TX, USA)
or 200 mg CA + 200 mg of PX (CA+PX) with a 7 – 14 day washout between treatments. Capsules are taken with 8 ounces of water. A computer-generated randomization to treatment is used. Once subjects are

Sponsors

Ingenious Ingredients L.P.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: All subjects were healthy and free from known: (1) a medical condition which hinders performance in a standard exercise program; (2) a history of cognitive dysfunction; (3) been currently taking prescription medications; (4) a known allergy to wheat flour; (5) a sleep disorder; (6) been/were pregnant or breastfeeding; or (7) a physician’s order to abstain/restrict caffeine or stimulant intake

Exclusion criteria

Exclusion criteria: Subjects who were taking prescription medications in the month prior to the initiation of the study and/or were told by a physician to abstain or restrict physical exercise, caffeine and/or stimulant intake

Design outcomes

Primary

MeasureTime frame
The Psychology Experiment Building Language (PEBL) software program (Version 2.1, http://pebl.sourceforge.net) was used to administer four cognitive function tests that assessed a range of cognitive and executive function aspects: 1. Berg-Wisconsin Card Sorting Task test (BCST) at baseline, 1 hour after initial ingestion and after the completion of a 10-kilometer run. 2. Psychomotor Vigilance Task Test (PVTT) at baseline, 1 hour after initial ingestion and after the completion of a 10-kilometer run.

Secondary

MeasureTime frame
Safety measured using: 1. Side Effect Questionnaire at baseline, 1 hour after initial ingestion and after the completion of a 10-kilometer run. 2. Changes in blood clinical chemistries at baseline, 1 hour after initial ingestion and after the completion of a 10-kilometer run. 3. Changes in heart rate after initial ingestion and after each kilometer runing.

Countries

United States of America

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026