  Non-minimal interactions are proven to be generated at the one-loop level in
simple scalar-tensor gravity models. The John interaction from the Fab Four
class is generated. The interaction affects the speed of gravitational waves in
the contemporary Universe. Its role in low-energy phenomenology is discussed.
Brans-Dicke-like interaction is generated in a non-minimal model. An
opportunity to generate a dynamic low-energy Newton constant is addressed.

High Energy Physics - Theory;General Relativity and Quantum Cosmology