Buck Institute for Research on Aging Jun 5 2025 A team of international researchers has developed a new biological age "clock" that estimates how well someone is aging, not just how "old" they or their various organs might be. The IC Clock, which is described in a study in Nature Aging , measures intrinsic capacity (IC), the sum of six key functions that determine healthy aging: mobility, cognition, mental health, vision, hearing and nutrition/vitality. Maintaining function during the aging