A Study of LY4178256 in Healthy Participants

Inclusion Criteria: * Are overtly healthy as determined by medical evaluation including medical history, physical examination, and other screening procedures. * Have a body mass index within the range of 19.0 to 32.0 kilograms per square meter (kg/m²) * Individuals assigned male at birth willing to practice effective contraception throughout the study and individuals assigned female at birth not of childbearing potential may participate in this trial. Exclusion Criteria: * Have significant history of or current cardiovascular, respiratory, renal, gastrointestinal, endocrine, hematological, dermatological, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; of constituting a risk when taking the Investigational Medicinal Product (IMP); or of interfering with the interpretation of data. * Have abnormal blood pressure * Have a 12-lead electrocardiogram (ECG) abnormality at screening that, in the opinion of the investigator, increases the risks associated with participating in the study, have a mean QT interval corrected using Fridericia's formula (QTcF) of greater than 450 milliseconds (\>450 msec) for males, or \>470 msec for females. * Regularly use known drugs of abuse or with positive drug results (within the past 3 months). * Have a positive ethanol breath/urine test result or positive urine drugs of abuse screen at screening or check-in. * Have hemoglobin level less than 12 grams per deciliter (\<12 g/dL), or evidence of iron deficiency (ferritin less than 30 nanograms per milliliter (\<30 ng/mL), or history or presence of hemoglobinopathy, or history hemolytic anemia. Participants who received transfusion within the past 12 weeks, or requiring regular transfusion should be excluded. * Have clinically significant abnormal liver function tests at screening: alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphate (ALP), or total bilirubin ≥1.5x upper limit normal (ULN). Participants with confirmed Gilbert's syndrome may be enrolled. * Have significant renal impairment (estimated glomerular filtration rate less than 60 milliliters per minute per square meter (eGFR\<60mL/min/1.73 m ²)).