What if vampire legends were rooted in a real disease?

This week, we’re breaking down Porphyria — a rare genetic disorder that disrupts heme production and can cause extreme sunlight sensitivity, blistering skin, severe abdominal pain, and neurologic crises.

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📚 References

1. Medicover Genetics. Porphyria—The Facts Behind the So-Called Vampire Disease. https://medicover-genetics.com/porphyria-the-facts-behind-the-so-called-vampire-disease/
2. Mayo Clinic Staff. Porphyria: Symptoms & Causes. Mayo Clinic.https://www.mayoclinic.org/diseases-conditions/porphyria/symptoms-causes/syc-20356066
3. Hefferon M. Vampire Myths Originated With a Real Blood Disorder. Queen’s Gazette. https://www.queensu.ca/gazette/stories/vampire-myths-originated-real-blood-disorder (Queen's University)
4. Wikipedia Contributors. Porphyria. Wikipedia, The Free Encyclopedia. Updated February 2026. https://en.wikipedia.org/wiki/Porphyria (Wikipedia)
5. Nester EW, Anderson DG, Roberts CE, Pearsall NN, Nester MT. INHERITANCE PATTERNS. In: Understanding Genetics: A Molecular Approach. https://www.ncbi.nlm.nih.gov/books/NBK115561/ (NCBI)
6. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Porphyria. NIDDK Web site. https://www.niddk.nih.gov/health-information/liver-disease/porphyria (NIDDK)
7. Gene.Vision. Genetic Basics & Inheritance Pattern. https://gene.vision/genetic-basics-inheritance-pattern/
8. Porphyria Foundation. History of Porphyria. Porphyria Foundation. https://porphyriafoundation.org/for-patients/about-porphyria/history-of-porphyria/
9. Wiley Online Library. Porphyria and Related Disorders: Clinical, Diagnostic, and Therapeutic Challenges. Liver International.https://onlinelibrary.wiley.com/doi/10.1111/liv.15960