The present invention provides a composition for diet comprising an essential oil adsorbent is coated with neroli oil to prepare an essential oil-coated particle, and then the particle is covered with a essential oil adsorbing and desorbing agent to prepare the carbon-coated particle (NR), the carbon-coated particle similarly prepared by using jasmin oil instead of neroli oil (JS), the carbon-coated particle similarly prepared by using rose oil instead of neroli oil (RO), and/or the carbon-coated particle similarly prepared by using cineol type Eucalyptus oil instead of neroli oil (CE), and the agent for diet comprising thereof as active ingredients. Accordingly, the agent for treating adipositas having high safety, of which composition ratio can be changed depending on a symptom of adipositas, is provided.