Figure 4

![Figure 4: Meta-analysis results for vitamin B12 supplementation effects on cognitive function, depressive symptoms, and fatigue are displayed, pooling data from studies where complaints were not associated with overt deficiency.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8000524/bin/nutrients-13-00923-g004.jpg)

> Source: Stefan Markun et al. "Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptom." *Nutrients*, 2021. PMID: [33809274](https://pubmed.ncbi.nlm.nih.gov/33809274/)

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  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8000524/bin/nutrients-13-00923-g004.jpg" alt="Meta-analysis results for vitamin B12 supplementation effects on cognitive function, depressive symptoms, and fatigue are displayed, pooling data from studies where complaints were not associated with overt deficiency." />
  <figcaption>Figure 4. Meta-analysis results for vitamin B12 supplementation effects on cognitive function, depressive symptoms, and fatigue are displayed, pooling data from studies where complaints were not associated with overt deficiency.<br>  Source: Stefan Markun et al. "Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptom." <em>Nutrients</em>, 2021. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/33809274/">33809274</a></figcaption>
</figure>