FIGURE 4

![FIGURE 4: Forest plot depicting pooled differences in serum copper or selenium levels between alopecia areata patients and healthy individuals.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11683520/bin/JOCD-24-e16740-g001.jpg)

> Source: Ruiying Wu et al. "Association Between Serum Trace Elements Level and Alopecia Areata: A Systematic." *Journal of cosmetic dermatology*, 2025. PMID: [39739356](https://pubmed.ncbi.nlm.nih.gov/39739356/)

<figure>
  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11683520/bin/JOCD-24-e16740-g001.jpg" alt="Forest plot depicting pooled differences in serum copper or selenium levels between alopecia areata patients and healthy individuals." />
  <figcaption>FIGURE 4. Forest plot depicting pooled differences in serum copper or selenium levels between alopecia areata patients and healthy individuals.<br>  Source: Ruiying Wu et al. "Association Between Serum Trace Elements Level and Alopecia Areata: A Systematic." <em>Journal of cosmetic dermatology</em>, 2025. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/39739356/">39739356</a></figcaption>
</figure>