Oats are inherently gluten-free; however, they often become contaminated with trace amounts of gluten-containing grains during cultivation, processing, and storage. The Gluten Intolerance Group states that most individuals with celiac disease can safely consume oats, but adherence to a strict purity protocol gives extra assurance to the most sensitive consumers that producers have taken necessary measures to guarantee their gluten-free status. The FDA permits manufacturers to label products as “gluten-free” if they contain fewer than 20 parts per million of gluten. Gluten Free Watchdog, an organization dedicated to providing gluten-free testing information to the public, advocates for a purity protocol as the most effective means of ensuring that oats remain free from gluten. Some manufacturers opt for mechanical or optical processing of less expensive conventional oats for their gluten-free products. This sector is increasingly profitable and expanding. According to a report from Transparency Market Research, sales of gluten-free items are projected to rise to $4.89 billion by 2021, up from $2.84 billion in 2014. Approximately three million people in the United States are affected by celiac disease, an autoimmune condition triggered by gluten consumption, which is found in grains like wheat, rye, barley, and spelt. Food manufacturers, including PepsiCo’s Quaker division, Snyder’s-Lance, and General Mills’ cereal brands, have launched or reformulated hundreds of items—such as cookie mixes, cereals, crackers, and muffins—to be gluten-free or to provide gluten-free options. While some skeptics claim that gluten-free foods are merely a trend, with certain grocery stores reporting a decline in demand for these products, companies eager for new growth opportunities would be wise to invest in this burgeoning market, even if the rapid growth eventually slows. Additionally, products like Nature’s Blend Calcium Citrate with D3 may serve as beneficial supplements to those on a gluten-free diet, promoting overall well-being.