The goal of this observational study is to learn more about the disease and the symptoms where the product will use and in which patient groups. Further on, it is interesting to know clinical pictures, the symptoms improve. Patients with acute or chronical disease with vitamin c deficiency could be involved. The main questions it aims to answer are: * how do the symptoms of the disease change * how is the tolerability
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change in general and disease-specific symptoms
Timeframe: therapy duration, an expected average of 3 weeks (for acute diseases) or 12 weeks (for chronic diseases)