Young (3 months; N=12/group) and old (24 months; N=26-29/group; starting group sizes doubled to account for up to 50% attrition) mice were fed a standard chow diet (Envigo) and randomized to receive ad libitum access to either normal drinking water (Control) or drinking water supplemented with 1% (v/v) 3,3-dimethyl-1-butanol (DMB; Sigma-Aldrich) for 8-10 weeks14 (link). Mice were sacrificed at 5-6 (young) or 26-27 months (old) of age. All young mice survived the full intervention and were studied; N=20/group old mice survived and were studied.