Polyhedral products, graph products and p-central series

We relate polyhedral products of spaces to graph products in algebraic categories via the loop homology and Lie algebras associated with central series. By way of application, we describe the restricted Lie algebra associated with the lower 2-central series of a right-angled Coxeter group and identify its universal enveloping algebra with the loop homology of the Davis-Januszkiewicz space.