Fermentation is the oldest traditional method in order to protect against spoilage and pathogenic microorganisms. Thermal treatment, pH and water activity lowering and preservative addition other food preservation techniques that are commonly used. Although, as preservatives, many improved antibiotic and chemical agents have been gained, there are some other factors such as rapid resistance to antibiotics used in bacteria, in order to limit their use in food, to be found dimensions of threatening human health of the chemical protection and to cause allergic reactions. Recently, studies on bacteriocins that are produced by the safe bacteria, such as lactic acid bacteria, contain no toxic and adverse effects for human consumption have gained sudden intensity in accordance with the request against consumers in developing microbiologically safe and minimal processed food. There are some important effects using of bacteriocins accepted the new generation of antimicrobial agents as food preservatives such as extension of shelf life, reducing of the use of chemical preservatives and the economic loss caused degradation by microorganisms. Nisin, defined as GRAS (Generally Recognized as Safe) by FDA and named the E234 code 'Nisin-protective' or 'natural protective' located in the food additives list, first used in 1988 as a natural preservative by prohibiting of antibiotics using in food in the US. Nowadays in more than 50 countries, there have been more successful implementation of the nisin protected up the food from milk and dairy products to canned foods many food products

The second decade of the XXI century has experienced the development of meat substitutes. The origin of this niche is said to emerge from environmental concerns. One of the market leaders in this infant industry is Beyond Meat company. The study aims to identify the impact of the capital markets and media coverage for an infant industry, such as meat alternatives, on the example of Beyond Meat. A sizeable portion of the investment in this new branch of the food sector came from the capital markets, which expect a return on their investment. The Beyond Meat case suggests that these substantial investments did not bring expected returns, which several factors, such as the post-COVID bear market and lack of demand for meat substitute products, could have caused. Thus, despite awareness campaigns, so far, the company has experienced losses. The development of this market niche acted contrary to what was expected. The market failings correlate with the loss of interest of the retail investors, which was attempted to be measured by this research. As a proxy for the retail investor interest, Google Trends Index was used and compared to the stock prices (a method often described as a Buzz Indicator).