A Study of LIV001 in Healthy Subjects and Those with Mild-to-Moderate Active Ulcerative Colitis (UC)

The study will be conducted in 2 parts. Approximately 36 subjects are planned to be enrolled into the study. * In Part A (SAD), approximately 18 healthy subjects will be enrolled in 2 sequential cohorts (Cohorts SAD1 and SAD2) and randomized 2:1 to receive a single dose of investigational product (IP) (LIV001 or placebo) * In Part B (MAD), approximately 18 healthy subjects will be enrolled into 2 sequential cohorts (Cohorts MAD1 and MAD2) and randomized 2:1 to receive LIV001 or placebo for 14 days. Oversight of the study will be provided by a Safety review committee (SRC) comprising the Principal Investigator (PI), the local Medical Monitor (MM), and a representative of the Sponsor, at a minimum.