The purpose of this study is to determine the effects of investigational medication or steroids on how the body uses proteins and fats, and on energy expenditure. Energy expenditure refers to the amount of energy a person uses to maintain basic body functions and perform physical activities.

Participants in this study will receive either the investigational medication or steroids. The study will monitor how these treatments affect the body's use of proteins and lipids, as well as energy expenditure. This will involve measuring these factors under controlled conditions.

• Who can participate: Eligible participants are adults aged 18 to 65 who are generally healthy. Key eligibility factors include no history of metabolic disorders and not currently taking medications that affect metabolism.
• Study details: Participants will receive either the investigational medication or steroids to assess their effects on protein and lipid use and energy expenditure. A placebo, which is an inactive substance that looks like the investigational medication but does not contain any medicine, may also be used.