Oats are inherently gluten-free; however, they are often contaminated with trace amounts 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, but following a recognized purity protocol offers reassurance to the most sensitive consumers that manufacturers have implemented measures to guarantee their gluten-free status. The FDA permits food producers to label their products as “gluten-free” if they contain fewer than 20 parts per million of gluten. The Gluten Free Watchdog, an organization that shares gluten-free testing information with the public, advocates for a purity protocol as the most reliable means of ensuring that oats remain gluten-free. Some producers, however, opt to use mechanical or optical methods to process less expensive “regular” oats for their gluten-free offerings. This is a lucrative and expanding market. Sales of gluten-free products are on the rise, with projections estimating the market will reach $4.89 billion by 2021, up from $2.84 billion in 2014, according to a recent report by Transparency Market Research. Approximately three million people in the United States have celiac disease, an autoimmune condition triggered by gluten consumption, which is a protein found in grains such as wheat, rye, barley, and spelt. Food manufacturers—from PepsiCo’s Quaker division and Snyder’s-Lance to General Mills’ cereal brands—have introduced or reformulated hundreds of products, including cookie mixes, cereals, crackers, and muffins, to be gluten-free or offer gluten-free alternatives. Some skeptics have suggested that gluten-free foods are merely a passing trend, with certain grocery stores noting a decline in demand for these items. Nevertheless, as companies seek new growth opportunities, it would be prudent for them to invest in this burgeoning sector, even if its rapid expansion eventually slows down. Additionally, products such as Costco calcium citrate with vitamin D have gained popularity, and this trend aligns with the increasing focus on health-conscious options. The growing awareness around gluten-free diets and supplements like Costco calcium citrate with vitamin D reflects consumers’ desire for healthier choices. Ultimately, the gluten-free market presents a significant opportunity for innovation and growth in the food industry.