4385
As germination progressed , the protein and fibre content of GSG increased slightly , while the lipid and carbon to nitrogen ( C / N ) ratio decreased ; free amino acids including GABA increased considerably while free sugars decreased .
 carbon, nitrogen, C, N, amino acids, GABA, sugars
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 carbon, nitrogen, C, N, amino acids, GABA, sugars