Below is a link to the web page that the presenter cited regarding the use of borax to remediate potential damage from the PCR test. On a different call conducted several days earlier (and not featuring the same presenter), a participant posted in the chat window that while taking borax doesn’t help in remediating Morgellons, it does prevent NANO from forming in the first place.
-NW

Borax Cures and Health Benefit
earthclinic
Modified: May 08, 2021
https://www.earthclinic.com/remedies/borax.html

[snip]

Borax is an increasingly popular natural remedy for a whole host of health issues.

Commonly used as a natural cleaning agent, Borax's reported number of successful treatments and health benefits are extensive. Additionally, this remedy is easy to make and very inexpensive.

Borax is used to treat overall chronic illnesses, including autoimmune diseases, hormone problems, and chronic pain…

How Much Borax Should I Take?
Earth Clinic’s Ted recommends ¼ teaspoon (940 mg ~ 1,000 mg) of borax in 1 liter of water for men and 1/8 teaspoon (470 mg ~ 500 mg) of borax in 1 liter of water for women each day. This would give men about 113 mg of boron each day they drink the solution and women about 56 mg of boron each day.

Walter Last has popularized another method of dosing borax. He recommends adding a heaping teaspoon to a liter of water and then taking 1 teaspoon of this borax solution once or twice daily. This solution delivers 25-30 mg of borax (and thus about 3 mg of boron) per dose. He recommends taking it with meals.