Richard Miller's Intervention Testing Program should really be your go-to for this: https://www.nia.nih.gov/research/dab/interventions-testing-program-itp/suppo

Richard Miller's Intervention Testing Program should really be your go-to for this: https://www.nia.nih.gov/research/dab/interventions-testing-program-itp/supported-interventions https://www.nia.nih.gov/research/dab/interventions-testing-p... He has no conflicts of interests, works for the NIA, and he's quite open to trying other compounds, having put out the call for suggestions.