Creatine in Cognitive Performance (CCP-Study) - in vegetarians and omnivores

Creatine in Cognitive Performance (CCP-Study) - in vegetarians and omnivores - ccp

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00017250

Enrollment

120

Registered

2019-07-05

Start date

2019-05-28

Completion date

Unknown

Last updated

2025-10-06

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

Conditions

healthy subjects

Interventions

Group 1: Vegetarians/Vegans - The duration of participation is 12 weeks. Each participant takes 5g of creatine in form of powder for 6 weeks and 5g of placebo (maltodextrin) in form of powder for 6 we

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: - no psychological or physical disorders or disabilities that are likely to cause fluctuations in cognitive performance during the study period - age is at least 18 years - eating behaviour is stable, i.e., either omnivore or vegetarian/vegan for at least 6 months - They have not taken creatine in the last 6 months before the study begins - They are able to consent - They do not consume on average more than 20g of alcohol per day (if female) or not more than 40g of alcohol per day (if male) - They do not consume recreational drugs more than once a week - They do not do more than 6 hours of intense sports per week

Exclusion criteria

Exclusion criteria: /

Design outcomes

Primary

Measure	Time frame
Test scores in the two tests: - standardised 10-minute subtest of Raven Advanced Progressive Matrices - Wechsler auditory Backward Digit Span (BDS) task (Wechsler 1955) All participants are tested three times: At the beginning, after creatine supplementation and after placebo supplementation. We will test 120 participants. Participation ends for each participant after the third testing round.	—

Secondary

Measure	Time frame
We will conduct exploratory analyses for the following measures: D2 Test of Attention (Brickenkamp, 2002) Trail-Making-Test A (TMT-A) (Reitan, 1958) Block-Tapping-Test (BTT) (Schellig, 1997) Auditory Verbal Learning Test (AVLT, in German: VLMT, Helmstaedter & Durwen, 1990) Brief-visuospatial Memory Test –Revised (BVMT-R) Trail-Making-Test B (TMT-B) (Benedict, 1997) Stroop test (Farb-Wort-Interferenz Test, FWI-T, Bäumler, 1985) A test of verbal fluency called “Regensburger Wortflüssigkeitstest (RWT)” (Aschenbrenner, Tucha, Lange, 2000) Edinburgh Handedness Inventory (Oldfield, 1971) A test of crystallised intelligence called “Mehrfach-Wahl-Wortschatztest (MWT-B)” (Lehrl, 2005)	—

Measure

Time frame

We will conduct exploratory analyses for the following measures: D2 Test of Attention (Brickenkamp, 2002) Trail-Making-Test A (TMT-A) (Reitan, 1958) Block-Tapping-Test (BTT) (Schellig, 1997) Auditory Verbal Learning Test (AVLT, in German: VLMT, Helmstaedter & Durwen, 1990) Brief-visuospatial Memory Test –Revised (BVMT-R) Trail-Making-Test B (TMT-B) (Benedict, 1997) Stroop test (Farb-Wort-Interferenz Test, FWI-T, Bäumler, 1985) A test of verbal fluency called “Regensburger Wortflüssigkeitstest (RWT)” (Aschenbrenner, Tucha, Lange, 2000) Edinburgh Handedness Inventory (Oldfield, 1971) A test of crystallised intelligence called “Mehrfach-Wahl-Wortschatztest (MWT-B)” (Lehrl, 2005)

—

Countries

Germany

Contacts

Public ContactAnnika Faust

Universitätsklinikum Bonn

CCP-Studie@ukbonn.de+4915789081363

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 9, 2026