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Since bile salts play a crucial role in the lipid digestion process , the aim of this work is to analyze the interactions between Pluronic F127 or F68 and the bile salt NaTDC when the latter is added at physiological concentrations .
 bile salts, Pluronic F127 or F68, bile salt, NaTDC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 bile salts, Pluronic F127 or F68, bile salt, NaTDC