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Source study found

Story checked

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

Medical Xpress · 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
Then inspect each claim

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 statedthree hours; four hours; up to nine hours

Why this verdict

The profile supports post-dose assessments at 3, 5.5, and 7.5 hours and reports improved cognitive performance plus MRS metabolic changes. But it does not verify a peak at four hours or duration up to nine hours; those timing/magnitude claims go beyond the abstract-level evidence supplied.

1

Study evidence

A single high oral dose of creatine (0.35 g/kg) improved cognitive performance and processing speed during sub-total 21 h sleep deprivation compared with placebo (abstract claim).

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

Study evidence

Creatine altered the PCr/Pi ratio during sleep deprivation compared with placebo.

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

As stated15 test subjects

Why this verdict

The abstract supports that subjects received creatine or placebo and performed cognitive tests during sleep deprivation at baseline and post-dose timepoints. However, the supplied abstract-level profile does not report the sample size of 15, so that detail is not verifiable at this depth.

1

Study evidence

A single high oral dose of creatine (0.35 g/kg) improved cognitive performance and processing speed during sub-total 21 h sleep deprivation compared with placebo (abstract claim).

“subjects were orally administered a high single dose of creatinemonohydrate (0.35 g/kg) while performing cognitive tests during sleep deprivation”
Claim 3 of 5Not coveredThe article says improvements were seen in processing capacity and short-term memory.View evidenceHide evidence

Why this verdict

The abstract-level profile supports improved cognitive performance and processing speed. It does not specifically identify short-term memory as an improved domain, and 'processing capacity' is not clearly the same as the reported processing speed.

1

Study evidence

A single high oral dose of creatine (0.35 g/kg) improved cognitive performance and processing speed during sub-total 21 h sleep deprivation compared with placebo (abstract claim).

“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 researchers caution that such a high dose is not advisable at home because it may strain the kidneys and carry health risks.View evidenceHide evidence

Why this verdict

The supplied paper profile is abstract-only and does not include safety guidance, kidney-strain warnings, or at-home dosing cautions, so this story claim cannot be verified from the provided paper evidence.

Claim 5 of 5SupportedResearchers at Forschungszentrum Jülich discovered that a high single dose of creatine can temporarily improve cognitive performance reduced by sleep deprivation.View evidenceHide evidence

As statedtemporarily

Why this verdict

The abstract-level profile reports a human interventional creatine-versus-placebo study during ~21 h sleep deprivation and states that a single high oral dose improved cognitive performance/processing speed. The headline causal wording is consistent with the interventional abstract claim, though abstract-only evidence lacks effect sizes and statistical details.

1

Study evidence

A single high oral dose of creatine (0.35 g/kg) improved cognitive performance and processing speed during sub-total 21 h sleep deprivation compared with placebo (abstract claim).

“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
  • Single high oral dose of creatine monohydrate was 0.35 g/kg versus placebo during ~21 h sleep deprivation.
  • Cognitive outcomes were measured repeatedly at evening baseline and 3, 5.5, and 7.5 h post-dose.
  • Brain metabolism was assessed with 31P- and 1H-MRS, including PCr/Pi, ATP, pH, and tCr/tNAA changes.
  • Findings are acute single-dose effects in a specific sleep-deprivation protocol; durability and generalizability beyond that setting are unknown.
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 sleep deprivation improves cognitive performance/processing speed versus placebo.Single high oral dose creatine (0.35 g/kg) vs placebo during ~21 h sleep deprivation with repeated within-subject cognitive testing and serial 31P-/1H-MRSExpand

In plain English

In a human in-vivo study during ~21 h sub-total sleep deprivation, a single high oral dose of creatine monohydrate (0.35 g/kg) versus placebo was associated with improved cognitive performance and processing speed and with acute changes in cerebral high-energy phosphate markers (PCr/Pi, ATP, tCr/tNAA) and pH, measured with repeated 31P- and 1H-MRS and cognitive testing at evening baseline and 3, 5.5, and 7.5 h post-dose.

Key findings

  • A single high oral dose of creatine (0.35 g/kg) improved cognitive performance and processing speed during sub-total 21 h sleep deprivation compared with placebo (abstract claim).
  • Creatine administration induced changes in cerebral high-energy phosphate markers (PCr/Pi, ATP, tCr/tNAA) and prevented a drop in pH during sleep deprivation (reported from 31P- and 1H-MRS in abstract).
“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
  • Study reports acute single-dose effects; durability and generalizability beyond the tested protocol are unknown.

4 further details could not be confirmed from the summary.

2human in vivoTest whether the same creatine dosing during sleep deprivation induces detectable changes in brain high-energy phosphate metabolism and related MRS metabolites (31P-MRS: PCr/Pi, ATP, pH; 1H-MRS: tCr/tNAA) versus placebo.randomized placebo-controlled single-dose during sleep deprivationExpand

In plain English

Randomized placebo-controlled human in vivo study testing a single high oral dose of creatine monohydrate (0.35 g/kg) versus placebo during ~21 h sleep deprivation with repeated 31P-MRS (two consecutive scans) and 1H-MRS at baseline and 3, 5.5, and 7.5 h post-dose. Abstract reports that creatine induced changes in PCr/Pi and ATP (31P-MRS), increased tCr/tNAA (1H-MRS), and prevented a drop in pH, compared with placebo.

Key findings

  • Creatine altered the PCr/Pi ratio during sleep deprivation compared with placebo.
  • Creatine produced changes in ATP measures during sleep deprivation compared with placebo.
“Two consecutive 31P-MRS scans, 1H-MRS ... were performed each at evening baseline, 3, 5.5, and 7.5 h after single dose creatine (0.35 g/kg) or placebo”
What this piece can’t prove
  • Abstract does not specify brain region(s) targeted by MRS, acquisition parameters, or exact timing of scans beyond listed timepoints.

3 further details could not be confirmed from the summary.

Finally, the search trail

Method layer

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NewsLink checks the story. Tessa is where you inspect the paper, authors, evidence, and research context.

Papers considered

The selected paper, plus nearby candidates.

PubMed, Europe PMC, Crossref · 38 candidate papers

Candidate

Waste heat management in electric motors using thermoelectric generator integrated with phase change material and metal foam-embedded heat sink

Energy Reports · 2024 · Crossref

Source (opens in a new tab)

And 32 more candidates considered.