A cursory search for the health properties of linen yields scores of articles purporting the healing “signature frequency” of linen.

Most repeat the following with minimal variation:

In 2003, a study was done by a Jewish doctor, Heidi Yellen, on the frequencies of fabric.  According to this study, the human body has a signature frequency of 100, and organic cotton is the same – 100.  The study showed that if the number is lower than 100, it puts a strain on the body.  A diseased, nearly dead person has a frequency of about 15, and that is where polyester, rayon, and silk register. Nonorganic cotton registers a signature frequency of about 70. However, if the fabric has a higher frequency, it gives energy to the body.  This is where linen comes in as a super-fabric.  Its frequency is 5,000. Wool is also 5,000, but when mixed together with linen, the frequencies cancel each other out and fall to zero.

In a 2012 clarification, Crawford-Yellen claims that the frequency was measured in megahertz using a device called the “Ag-Environ” machine.

I have been unable to source the purported 2003 study. Crawford-Yellen coauthored a 2013 article which contains the passage directly cited on many sites.

This oft-cited claim regarding the healing properties of linen appears to be Hebraic schizobabble originating from one actor.

7/30/2023: emailed Dr. Heidi Crawford-Yellen asking for clarification on her alleged 2003 study

There is a parallel phenomenon of repeated copy-paste citations making a similar claim regarding the comparative frequencies of textiles attributed to Otto Warburg. I have not yet isolated the origin of this claim.