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We show how minimally-coupled matter fields of arbitrary spin, when coupledto Ricci-Based Gravity theories, develop non-trivial effective interactionsthat can be treated perturbatively only below a characteristic high-energyscale $\Lambda_Q$. Our results generalize to arbitrary matter fields thoserecently obtained for spin 1/2 fields in \cite{Latorre:2017uve}. We then usethis interactions to set bounds on the high-energy scale $\Lambda_Q$ thatcontrols departures of Ricci-Based Gravity theories from General Relativity.Particularly, for Eddington-inspired Born-Infeld gravity we obtain the strongbound $ |\kappa|<3.5 \times 10^{-14} \text{ m}^5 \text{kg}^{-1}\text{s}^{-2} $.

Effective interactions in Ricci-Based Gravity models below the non-metricity scale