Introduction: Interest in the therapeutic use of cannabidiol (CBD) has reached a fever-pitch in recent months, as CBD-containing products appear everywhere from online retailers to grocery stores and gas stations. The widespread availability of hemp-derived CBD products is confounding given that CBD is a U.S. Food and Drug Administration (FDA)-approved drug, and thus precluded from being added to food and beverages, or included in dietary supplements. The use by manufacturers of disease-related claims on marketing materials and product labels, along with the federal legalization of hemp in December 2018, has created political pressure on FDA to promulgate regulations. Conclusions: Accurate and informative labeling of hemp and hemp-derived CBD products is an important public health issue. FDA-regulated product labels are considered an essential tool for protecting consumers and enabling informed decision-making. Untruthful or unsubstantiated health-related claims, and unallowed Drug Claims, in marketing materials and on labels of CBD products may create harm by enticing consumers to forgo more evidence-based medical interventions. Furthermore, missing or inaccurate labeling of the amount of CBD, delta-9 tetrahydrocannabinol (THC), and potentially harmful contaminants such as pesticides, naturallyoccurring yeast and mold or heavy metals may result in harm and/or lack of efficacy. Manufacturers of these products may reasonably be expected to understand and adhere to FDA regulations for labeling and marketing of food, dietary supplements and drugs, both over-the-counter (OTC) and prescription, even though FDA has interpreted federal law as excluding them from these categories. As manufacturers prepare for forthcoming regulations, a better understanding of the basic framework for FDA labeling and marketing regulations for food, dietary supplements and drugs is warranted.