CJLS (Rabbi Isaac Klein) on cheese and rennet
Cheese made with rennet of any origin is permitted, since rennet is a dried, transformed substance used in minute quantity. Many Conservative Jews still prefer certified cheese; we note it either way.
Isaac Klein, "The Kashrut of Cheeses," CJLS (1969)
How this shows up in a verdict
When the Conservative lens is selected and a product’s label touches cheese and rennet, the verdict cites this record. The verdict reads “permitted” and names this ruling.
Hey Kosher summarizes published positions so shoppers can see the reasoning behind a verdict. It is not a halakhic authority; the cited body has the final word.