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Creatine found to improve cognitive performance during sleep deprivation (opens in a new tab)

medicalxpress.com · 2024-04-25

Short answerEvidenceSource

Short answer

Mostly not supported

Mostly not supported.

One claim goes further than the study. 3 other points were not covered by the paper.

  • 1 supported
  • 1 overstated
  • 3 not covered

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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Follow the evidence trail
1
2

NewsLink checks it

Mostly not supported

One claim overstates the study. One of five checks out. Three claims the study doesn't address.

  • 1 supported
  • 1 overstated
  • 3 not covered
Open claim evidence
3
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Evidence layer

Claim by claim

Each claim gets a verdict. Expand it to see the evidence directly below.

5 claims in this story

Showing all 5 claimsChoose a verdict to focus the list.

Claim 1 of 5OverstatedThree hours after taking creatine, a positive effect on brain metabolism and cognitive performance was observed; the effect peaked after four hours and lasted up to nine hours.View evidenceHide evidence

As statedpeak after four hours and lasted up to nine hours

Why this verdict

The profile supports post-dose cognitive testing and MRS biomarker measurements, including assessments at about 3, 5.5, and 7.5 hours, and it reports cognitive and metabolic changes after creatine. But the story's precise timing claim that the effect peaked after four hours and lasted up to nine hours outruns the supplied abstract-level evidence, which only documents the studied acute window up to about 7.5 hours post-dose and does not establish a four-hour peak.

1

Study evidence

Single high-dose creatine (0.35 g/kg) improved cognitive performance and processing speed during ~21 h sub-total sleep deprivation compared with placebo.

“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
2

Study evidence

Single high oral dose creatine (0.35 g/kg) was associated with changes in cerebral PCr/Pi as measured by repeated 31P-MRS during ~21 h sleep deprivation.

“Two consecutive 31P-MRS scans, 1H-MRS, and cognitive tests were performed each at evening baseline, 3, 5.5, and 7.5 h after single dose creatine (0.35 g/kg) or placebo during sub-total 21 h sleep deprivation (SD).”
Claim 2 of 5Not coveredThe study involved 15 test subjects who were kept awake overnight and asked to solve cognitive tasks.View evidenceHide evidence

As stated15 test subjects

Why this verdict

The abstract-level profile supports sleep deprivation of about 21 hours and repeated cognitive testing during the protocol. However, the supplied abstract profile explicitly lacks sample size, so the specific statement that there were 15 test subjects cannot be verified at this evidence depth.

1

Study evidence

Single high-dose creatine (0.35 g/kg) improved cognitive performance and processing speed during ~21 h sub-total sleep deprivation compared with placebo.

“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
2

Study evidence

Single high oral dose creatine (0.35 g/kg) was associated with changes in cerebral PCr/Pi as measured by repeated 31P-MRS during ~21 h sleep deprivation.

“Two consecutive 31P-MRS scans, 1H-MRS, and cognitive tests were performed each at evening baseline, 3, 5.5, and 7.5 h after single dose creatine (0.35 g/kg) or placebo during sub-total 21 h sleep deprivation (SD).”
Claim 3 of 5Not coveredThe article says improvements were seen in processing capacity and short-term memory.View evidenceHide evidence

Why this verdict

The supplied profile supports improved overall cognitive performance and processing speed. It does not specify, at abstract depth, the individual cognitive tests or outcomes needed to verify improvements in short-term memory or to equate the reported result with 'processing capacity.'

1

Study evidence

Single high-dose creatine (0.35 g/kg) improved cognitive performance and processing speed during ~21 h sub-total sleep deprivation compared with placebo.

“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
Claim 4 of 5Not coveredThe authors caution that excessive or high-dose creatine is not recommended at home because it can strain the kidneys and pose health risks.View evidenceHide evidence

As statedhigh doses ... put a heavy strain on the kidneys

Why this verdict

The paper profile supports that the study used a high single oral creatine dose, but the supplied abstract-level evidence does not report adverse events, kidney strain, home-use recommendations, or a specific author safety caution. This safety statement may be external or in full text, but it is not verifiable from the supplied abstract profile.

1

Study evidence

Single high-dose creatine (0.35 g/kg) improved cognitive performance and processing speed during ~21 h sub-total sleep deprivation compared with placebo.

“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
Claim 5 of 5SupportedResearchers at Forschungszentrum Jülich discovered that a high single dose of creatine can temporarily improve cognitive performance that is reduced by sleep deprivation.View evidenceHide evidence

As statedtemporarily improve cognitive performance

Why this verdict

The abstract-level profile supports that this was a randomized placebo-controlled human study of a single high oral creatine dose during sleep deprivation and that creatine improved cognitive performance/processing speed relative to placebo in the acute post-dose window. Because the supplied paper profile describes an interventional design, the headline's causal framing is broadly supported at this depth, though quantitative magnitude is not available.

1

Study evidence

Single high-dose creatine (0.35 g/kg) improved cognitive performance and processing speed during ~21 h sub-total sleep deprivation compared with placebo.

“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
Then look for missing context

Context layer

What the story carried across

Nothing material from the study was dropped.

4 things the story did carry across
  • Primary intervention finding: a single high oral dose of creatine monohydrate during about 21 hours of sleep deprivation improved or preserved cognitive performance/processing speed versus placebo.
  • Study design: randomized placebo-controlled human interventional study with repeated testing during sub-total sleep deprivation.
  • MRS/metabolic biomarker component: creatine was associated with changes in cerebral PCr/Pi, ATP, tCr/tNAA and prevention of a pH drop as measured by 31P- and 1H-MRS.
  • Generalizability limitation: findings concern acute single-dose effects during a specific sub-total sleep-deprivation paradigm and may not generalize to chronic dosing, lower doses, or other sleep-deprivation settings.
Then read the study layer

Study layer

Study at a glance

Scan the study first. Expand only the parts you want to inspect.

Pieces of work

2

Evidence read

study summary

Lead result

human in vivo

1Lead resulthuman in vivoTest whether a single high oral dose of creatine during acute/sub-total sleep deprivation improves cognitive performance (fatigue-related cognitive deterioration).Randomized placebo-controlled single-dose creatine vs placebo during sub-total ~21 h sleep deprivation; repeated-measures designExpand

In plain English

In a randomized placebo-controlled human study during ~21 h sub-total sleep deprivation, a single high oral dose of creatine monohydrate (0.35 g/kg) given in the evening was associated with preserved/improved cognitive performance and processing speed versus placebo and with concomitant changes in cerebral high-energy phosphate metabolites measured by 31P- and 1H-MRS.

Key findings

  • Single high-dose creatine (0.35 g/kg) improved cognitive performance and processing speed during ~21 h sub-total sleep deprivation compared with placebo.
  • Creatine induced changes in cerebral high-energy phosphate metrics (PCr/Pi, ATP, tCr/tNAA) and prevented a drop in pH during sleep deprivation as measured by 31P- and 1H-MRS.
“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
What this piece can’t prove
  • Findings reflect acute single-dose effects during sub-total (~21 h) sleep deprivation and may not generalize to chronic dosing or different sleep-deprivation paradigms.

2 further details could not be confirmed from the summary.

2human in vivoTest whether a single high oral dose of creatine during acute/sub-total sleep deprivation induces measurable changes in cerebral high-energy phosphate metabolism and related MRS biomarkers (31P-MRS and 1H-MRS), including PCr/Pi, ATP, pH, and tCr/tNAA.Randomized placebo-controlled single-dose creatine vs placebo during sub-total sleep deprivationExpand

In plain English

In a human in vivo placebo-controlled single-dose creatine study during ~21 h sub-total sleep deprivation, a single oral high dose of creatine monohydrate (0.35 g/kg) was associated with changes in cerebral high-energy phosphate metrics measured by repeated 31P-MRS (PCr/Pi, ATP, pH) and with changes in tCr/tNAA measured by 1H-MRS, measured at baseline and 3, 5.5, and 7.5 h post-dose; cognitive testing showed improved performance and processing speed. The authors interpret findings to indicate that a high single dose of creatine can partially reverse metabolic alterations and fatigue-related cognitive deterioration during acute sleep deprivation.

Key findings

  • Single high oral dose creatine (0.35 g/kg) was associated with changes in cerebral PCr/Pi as measured by repeated 31P-MRS during ~21 h sleep deprivation.
  • Creatine administration was associated with changes in ATP levels measured by 31P-MRS during the sleep-deprivation protocol.
“Two consecutive 31P-MRS scans, 1H-MRS, and cognitive tests were performed each at evening baseline, 3, 5.5, and 7.5 h after single dose creatine (0.35 g/kg) or placebo during sub-total 21 h sleep deprivation (SD).”
What this piece can’t prove
  • Abstract lacks MRS acquisition parameters, voxel locations, quantification methods, and statistical details (exact p-values, confidence intervals, correction for multiple comparisons).

2 further details could not be confirmed from the summary.

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