Did you ask this question somewhere else recently?
Anyway, if it was you, my "answer" is still the same... doesn't Dr. Earth Metabolic Transformer have whey in it.
I had to hunt it down.. it's quite old now(2012) and the ingredients may have changed but they don't list them anywhere now.
Here's a screenshot of the ingredients from their blog courtesy RIU
Wisconsin whey. Everybody back the f*ck up!
Not sure how much the whey plays part, overall, but whatever's going on, my plants like it and it's ""seems"" to balance the soil pH. But without actual testing I couldn't tell you for sure.