Ray Peat missing references: Schroeder 1987, Removal of toxic heavy metals from the diet had the same effect as caloric restriction.

[Kasper]

I am trying to find this study:

"First, in 1987, Schroeder found that the removal of toxic heavy metals from the diet had the same effect as caloric restriction. Second, although underfed animals grow more slowly, their metabolism is not necessarily depressed. (In fact, animals on a low protein diet have a higher rate of oxygen consumption than do the animals that eat a more normal diet.) "

From:
https://github.com/0x2447196/raypeatarchive/blob/d598e4b837e325e2856a120ce19f2fc0d0c9d385/documents/books/Generative Energy.md?plain=1#L1268

If anyone has an idea, would be great!