This interrupted case study presents a dialogue between two exercise partners, “Ciara” and “Lucia,” who have different approaches to diet and training. When Ciara questions Lucia’s strict “balanced breakfast,” a discussion ensues regarding the biological necessity of food components. The narrative guides students through the four major biomacromolecules (carbohydrates, lipids, proteins, and nucleic acids), their presence in nutrition labels, their role in the central dogma of biology, and their critical structural functions within cellular organelles. While working through the case, students are asked to connect several introductory concepts in basic biology to demonstrate how molecules, reactions, organelle structure and function, and central dogma are related. Originally designed as a review for high school biology students or for a nonmajors college-level biology course to emphasize the interconnective nature of basic biological concepts, the case could also be used in a college-level biology course for majors to review biomacromolecules and cellular composition.