The book I have gives only a summary; best to get a copy of "Options:
The Alternative Cancer Therapy Book" by Richard Walters, and check
the source directly, for details. I suspect it was the old therapy,
but am not 100% sure.

By the way, Jack Raso, in "Mystical Diets", p.141, claims:

"More than a dozen Gerson patients have arrived comatose at San Diego
hospitals as a result of electrolyte imbalances."

He also discusses the bacterial infections associated with the use of calf
liver.

Hope the above is helpful.

Tom Billings