In this blog post, we’ll examine the nature of sodium caseinate and the truth behind the controversy over its harmfulness, backed by scientific evidence, and explore how consumer anxiety came to be.
A long time ago, there was an advertisement in Korea that became a huge hit in the coffee industry. Looking at this ad, the slogan “We’ve removed sodium caseinate, which is harmful to your body, and replaced it with fat-free milk” stands out. It is said that this ad heightened consumer anxiety about sodium caseinate, leading to a significant increase in sales for the advertising company and a sharp decline in sales for other companies. Subsequently, other companies belatedly began manufacturing and selling coffee without sodium caseinate. So, is sodium caseinate—as the coffee industry claims—really harmful to our bodies? And if it isn’t harmful, why did it become the target of a witch hunt? We’ll explore these questions in this article.
Before examining the potential harm of sodium caseinate, let’s first understand what it actually is. The “casein” in sodium caseinate is a major protein in milk and the primary ingredient in cheese. Whey, another protein found in milk, is digested and absorbed very quickly. Unlike whey, casein is a highly beneficial substance that is digested slowly in the body, providing a steady supply of amino acids over an extended period. However, because casein proteins have very small molecular sizes, they cannot be easily extracted. Therefore, acid is added to milk to extract them in the form of a salt. The salt produced during this process is sodium caseinate.
When sodium caseinate is ingested, it ionizes into casein protein and sodium in body fluids. The casein protein begins to be digested by pepsin in the stomach, while the sodium is excreted from the body through bodily fluids. The casein protein, once digestion by pepsin begins, clumps together to form a sticky mucus. This mucus slows down the digestion process by pepsin, resulting in a very slow release of amino acids into the body. Due to these characteristics, it has gained immense popularity among bodybuilders who require a steady supply of protein over long periods, as well as arthritis patients who need to rely on muscle rather than joints.
So how did such a beneficial substance come to be viewed negatively by the public? This can be attributed to a combination of consumers’ lack of information and the commercial strategies employed by companies to exploit this. Consumers often lack accurate information about the foods they consume and are therefore heavily influenced by advertisements and media reports. Companies take advantage of this to build an image that their products are “healthier” by labeling certain ingredients as “harmful.” Sodium caseinate is one such example.
There are two main reasons why sodium caseinate, a type of protein, has come under fire in the industry. First, unlike the coffee and sugar found in coffee mixes, it is an artificially synthesized food additive. In modern society, there is a strong perception that natural equals healthy, leading to widespread distrust of artificial additives. The second reason is the industry’s pursuit of profit through maximized promotional impact. In today’s world, where eating well and living well are priorities, consumers are primarily concerned with finding the healthiest food options possible. The industry capitalizes on this consumer behavior by focusing its marketing efforts on promoting the idea that “their products are beneficial or harmless to the human body.” The coffee industry, too, portrays sodium caseinate—a substance consumers are generally unfamiliar with—as if it were poison. Consequently, consumers feel aversion to it, leading to a significant increase in demand for coffee mixes that do not contain sodium caseinate.
This situation has been further exacerbated by sensationalist reporting in some media outlets and the spread of exaggerated information on social media. When information is miscommunicated or distorted, people become fearful, and this has a major impact on their consumption habits. On the other hand, consumers need to make an effort to gain a deeper understanding of the ingredients they consume. Rather than simply believing claims that a specific ingredient is bad, they need to adopt an attitude of actively seeking to understand how that ingredient actually works and what the scientific evidence is.
Now that it has been labeled a “food additive,” it seems unlikely that sodium caseinate will be able to escape consumers’ critical scrutiny. This is entirely predictable, given that the harmful effects of food additives are constantly in the spotlight and processed food manufacturers are striving to reduce the number of additives they use. Furthermore, according to a survey conducted by a company that removed sodium caseinate from its products, consumers tended to be wary of the ingredient. This is supported by the explanation from a company representative that they decided to boldly remove sodium caseinate for this very reason.
In conclusion, the widespread negative perception surrounding even permitted food additives needs to be addressed. There is no need to feel unfounded anxiety due to sensationalist reporting by some media outlets or non-experts. Of course, the industry must continue its efforts to minimize the use of harmful food additives and reduce the scope of their application. Furthermore, the government and the media should strive to provide accurate information so that consumers can consume food with confidence.
