What "g" Stands for in the Book "the G Free Diet"

This page is the CodyCross answer for the clue below from Professions, Group 1539, Puzzle 1 (Executives).

Question is: What "g" Stands for in the Book "the G Free Diet"

and the answer is: GLUTEN

Word Meaning:

GLUTEN — (obsolete) Fibrin (formerly considered as one of the "animal humours").

Definitions from Wiktionary.

What "G" stands for in the book "The G Free Diet" — CodyCross Answer | CodyCross Solutions