Oats are inherently gluten-free, but they often become contaminated with small traces of gluten-containing grains during the processes of farming, processing, and storage. The Gluten Intolerance Group states that most individuals with celiac disease can safely consume oats, provided that they adhere to a purity protocol that assures the most sensitive consumers that producers have taken necessary precautions to keep them gluten-free. The FDA permits manufacturers to label products as “gluten-free” if they contain less than 20 parts per million of gluten. An organization known as Gluten Free Watchdog advocates for a purity protocol as the most effective measure to guarantee that oats are free from gluten. Some manufacturers, however, resort to using mechanical or optical processing on less expensive “regular” oats for their gluten-free offerings. This sector is rapidly expanding; sales of gluten-free products are projected to reach $4.89 billion by 2021, up from $2.84 billion in 2014, as reported by Transparency Market Research. Approximately three million individuals in the United States are affected by celiac disease, an autoimmune disorder triggered by the consumption of gluten found in grains such as wheat, rye, barley, and spelt. Food manufacturers, including PepsiCo’s Quaker division, Snyder’s-Lance, and General Mills, have introduced or reformulated numerous products like cookie mixes, cereals, crackers, and muffins to be gluten-free or to include gluten-free varieties. While some skeptics claim that gluten-free foods are merely a trend, with certain grocery stores even reporting a decline in demand for these products, businesses seeking growth should consider investing in this expanding industry, even if the current rapid growth eventually stabilizes. Additionally, as consumers become more health-conscious, products containing calcium citrate are gaining attention, prompting discussions about the calcium citrate expiration date to ensure product efficacy. The integration of gluten-free options and health-focused ingredients like calcium citrate is essential as the market continues to evolve.