The determination of the chemical components of interest in real life samples for quality assurance involves analytical chemistry. One such subdiscipline is spectroscopy which uses light as the signal of interest for sample analysis. We will focus on the hands-on analysis of food and supplements in the lab using a variety of spectroscopic instruments. For example, experiments involving techniques such as colorimetry to follow the degradation of aspirin, fluorescence for detection of riboflavin in tablets or drinks, flame emission for sodium and potassium in energy drinks, atomic absorption for calcium in milk or zinc in supplements, and infrared for polymer packaging films are planned to be done.