Figure 2

![Figure 2: Cognitive performance measures following glycine or placebo ingestion under sleep restriction are presented, assessing the amino acid's effects on daytime function.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3328957/bin/fneur-03-00061-g002.jpg)

> Source: Makoto Bannai et al. "The effects of glycine on subjective daytime performance in partially sleep-rest." *Frontiers in neurology*, 2012. PMID: [22529837](https://pubmed.ncbi.nlm.nih.gov/22529837/)

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  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3328957/bin/fneur-03-00061-g002.jpg" alt="Cognitive performance measures following glycine or placebo ingestion under sleep restriction are presented, assessing the amino acid's effects on daytime function." />
  <figcaption>Figure 2. Cognitive performance measures following glycine or placebo ingestion under sleep restriction are presented, assessing the amino acid's effects on daytime function.<br>  Source: Makoto Bannai et al. "The effects of glycine on subjective daytime performance in partially sleep-rest." <em>Frontiers in neurology</em>, 2012. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/22529837/">22529837</a></figcaption>
</figure>