Good day,
you mention that the body cannot produce vitamins. What about vitamin D? I was under the impression that the body can produce it when exposed to sunlight.
Thank you in advance for your response.
This statement originates from the time when the definition of vitamins was established, where only essential substances were categorized as such. Over time, this list has gradually expanded to include substances that have little in common with the original definition of vitamins (the name "vitamin" was derived from the words "vital" and "amine" = vital amines, yet some substances classified today as vitamins do not contain an amine group and are not essential—such as the referenced vitamin D. Occasionally, vitamins B12 and K2 are also mentioned as other examples, but these are produced by intestinal bacteria, not by our own bodies). However, it remains true that the vast majority of vitamins are essential, meaning the body cannot synthesize them.
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.