Short answer: no, there's no evidence, and the trail is easy to follow.
Every version of the "linen and wool = 5,000" chart goes back to one unpublished 2003 demonstration attributed to Heidi Yellen. A technician read fabrics with the "Ag-Environ" device, built by a retired Texas A&M professor to read "signature frequencies" of crops. There was no paper, no methods, no replication, and no check that the device measures anything. The original account says the body reads "100", linen and wool read "5,000", and wearing the two together cancels to zero. That last bit is the Deuteronomy 22:11 wool-and-linen rule, which is what the demo set out to confirm.
Two tells:
- The early versions use unitless "signature" numbers. "Hz" got added in later retellings, and you'll see the same figure written as 5,000 Hz, mHz and MHz, which differ by a factor of a billion.
- A fabric has no single frequency anyway. How anything vibrates depends on its size, tension and mass, the same way "a guitar string" isn't one note.
A 2024 peer-reviewed paper on linen wellness marketing (Fashion Highlights, "Fibre Fantasies") calls these unverified claims, and at least one linen shop, Trimita, pulled its frequency table because it couldn't back the numbers with a test method.
The real case for linen and wool is boring but true: they breathe and handle moisture well. Wear the wool drawers.
