The Shroud of Turin is a centuries‑old linen cloth kept in Turin, Italy, that some believe was used to wrap Jesus after his crucifixion; however, its authenticity and history have long been debated. Scientists have conducted DNA and metagenomic analyses on dust and fibers vacuumed from the shroud in the late 1970s and 1980s. These studies have identified a wide range of human mitochondrial DNA lineages corresponding to different regions, including the Near East, India, and Western Eurasia, indicating that many people have come into contact with the cloth over time.
In addition to human DNA, researchers have detected plant DNA from multiple species and microbial communities — including microorganisms adapted to saline environments — suggesting the cloth experienced varied environmental exposures during its long history and travels.
The diversity of DNA traces also includes signatures from historical trade routes and migrations that could explain why material associated with different regions appears on the fabric. While some analyses have noted a substantial portion of human DNA linked to lineages common in South Asia, this does not by itself prove the shroud’s geographic origin or date; instead, it highlights the complexity of contamination accumulated over centuries.
These findings do not imply the presence of unexplained or “non‑human” DNA. Rather, they show that multiple plant, animal, microbial, and human genetic traces are present due to handling, environmental contact, and historical movement of the cloth. This complicates efforts to isolate any original genetic material that might have been on the shroud when it was first made.
Scientific consensus still notes that the shroud’s radiocarbon date — based on tests from 1988 — places its manufacture in the medieval period (around 1260–1390), although debate continues about potential contamination and methodology. DNA evidence alone cannot determine the cloth’s age or definitively link it to a single historical figure.
In summary, DNA research on the Shroud of Turin reveals a mixture of genetic material accumulated over thousands of years from many sources. This reflects its complex history of contact with people and environments, rather than presenting an unexplained non‑human origin.
