NNC0581-0001

This study will assess the safety, tolerability, the pharmacokinetics from single injection (under the skin) of NNC0581-0001 and explores the pharmacodynamics in healthy participants and participants with hepatic steatosis (increased liver fat). Participants will either get NNC0581-001 or Placebo (dummy treatment). Which treatment participants get is decided by chance.NNC0581-0001 is a new medicine which cannot be prescribed by doctors. The study will last about 58 weeks.