A capsule oral delivery system is disclosed. The system includes an outer capsule completely enclosing an inner content, or a hard shell comprised of hydroxypropyl methylcellulose (HPMC) enclosing the content. A liquid formulation forming the inner content of the outer capsule is comprised of a hydroxycitric acid (HCA) salt, water, and glycerol, with the HCA being completely dissolved in the water and glycerol which may be the only components present in the capsule, which may be administered to a patient in a method of treatment to cause weight loss when repeatedly administered.