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Sulfur dioxide is a commonly used preservative and also acts as an antioxidant. Goji berries preserved in this way are most likely to contain a high proportion of antioxidants, primarily vitamin C, which is protected from oxidation by E220. If you consume one package of the product, nothing dramatic will happen to you. Consider the situation primarily as a valuable experience for the future with the aim of reading food labels thoroughly, where the goal is not only self-education but also, of course, the selection of a quality product.
The group of nitrites is crucial for food manufacturers - they have antibacterial effects, serve as color stabilizers (in meat products, they enhance the color, making them more sellable), and also prevent the oxidation of fats. These substances are problematic for our health mainly on two levels:
1. Nitrites combine with certain substances in foods to create so-called nitrosamines, which are highly carcinogenic. Some manufacturers try to mitigate these effects by fortifying some antioxidants (vitamins C, E), but these are almost always of synthetic origin, raising the question of whether the overall effect is worsened (due to pro-oxidation effects).
2. These preservatives tend to negatively affect the diversity of gut microbiota; their regular consumption consequently has an indirect impact on the functioning of health systems (immune, hormonal, nervous systems, etc.).
In practice, it is indeed challenging to buy processed meats without the presence of these additives. In this context, it is advantageous (if you must eat processed meats) to produce these foods at home without these components. It is not complicated and is substantially cheaper financially.
You are thinking in the right direction; it is always more beneficial to avoid these additives in your diet.
Questions answered by
Mgr. Martin Jelinek
Lecturer and author of the educational system
Nutrition educator, lecturer, and author of the educational system and the ZOF learning application.
Mgr. Martin Jelínek has been systematically involved in nutrition education since 1999. He is the founder of ATAC, the educational company behind NutriCourses, and the author of an educational system focused on nutrition, healthy lifestyle, and the practical application of nutrition knowledge.
He graduated from the Faculty of Science at Masaryk University in Brno. Throughout his professional career, he has combined nutrition, education, and the practical application of acquired knowledge. His educational system also includes the ZOF (Zone of Optimal Functioning) learning application, where students turn theory into practical work with meal plans.
In 2007, he launched the first intake of a six-month course focused on the education of nutrition advisors. Over time, this course became the foundation for the further development of the educational system and a range of specialised courses.