3418
In this context , the consumption of pro / prebiotics may be useful in both prevention and treatment of age - related pathophysiological conditions , such as recovery and promotion of immune functions , i . e . adjuvant effect for influenza vaccine , and prevention and / or alleviation of common " winter diseases " , as well as constipation and Clostridium difficile - associated diarrhoea .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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