Thanks for your response Saba! I would actually argue (not to be too technical) that the original work on telomere lengths is in fact second generation research - it was designed to look at why black women may have worse biological outcomes. You are now "peeling back the onion" to understand what might underlie these previously identified differences.
And I absolutely agree with you about the centrality of community engagement in interventions like the barbershop program - one potential pitfall in place-based and community-based interventions is if they are not planned with the input of the community themselves, in which case they can be problematic rather than empowering.