This study is a first-in-human, randomized, placebo-controlled, 4-part, single ascending dose and multiple ascending dose study. The study is designed to assess the safety, tolerability, PK, and PD and food effect of orally administered CKD-508 capsules and tablets in healthy subjects.

Inclusion Criteria:

• Subject voluntarily agrees to participate in this study and signs an Independent Ethics Committee (IEC)-approved informed consent prior to performing any of the Screening Visit procedures.
• Males and females between 18 to 55 years of age, inclusive, at the Screening Visit.
• Females of non-childbearing potential (surgically sterile [hysterectomy or oophorectomy] or postmenopausal (amenorrhea for more than 12 months with follicle-stimulating hormone (FSH) in postmenopausal range confirmed by an FSH test).
• Males must be unable to procreate (defined as surgically sterile [i.e., had a vasectomy ≥6 months prior to screening]) or must agree to use highly effective form of birth control from screening through 90 days after study completion.
• Non-smokers (or other nicotine use) as determined by history (no nicotine use over the past 6 months).

Exclusion Criteria:

• Subject has clinically significant history or evidence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, neurological, immunological or psychiatric disorder(s) as determined by the PI or designee.
• Subject has any disorder that would interfere with the absorption, distribution, metabolism or excretion of drugs.
• Subject has any concurrent disease or condition that, in the opinion of the PI, would make the subject unsuitable for participation in the clinical study.
• Subject has history of alcohol and/or illicit drug abuse within 2 years of Screening Visit.
• Subject has positive test for Hepatitis B surface antigen (HBsAg), Hepatitis C antibody or human immunodeficiency virus (HIV) antibody.