A Study of [14C]-LY3866288 in Healthy Participants

Inclusion Criteria: * Male and female participants who are overtly healthy determined by medical history, physical examination, 12-lead ECGs, vital signs measurements, and clinical laboratory evaluations at screening and/or check-in by the investigator * Have Body mass index between 18.0 and 32.0 kg/m\^2 (kilograms per meter squared) * Male participants who are infertile via bilateral orchiectomy or vasectomy * Female participants (non-childbearing potential only for Part A) who follow standard contraceptive methods Exclusion Criteria: * Female participants who are lactating or pregnant * Have history of alcohol and/or drug abuse within 2 years prior to screening * Have history or presence of any diseases or conditions of clinical significance by the Investigator (or designee) and/or Sponsor * Have history of significant hypersensitivity, intolerance, or allergy to any drug compound, food, or other substance, unless approved by the investigator