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To better understand this phenomenon , we evaluated the bioavailability of FAs in linseed - oil and palm - stearin blends compared to their interesterified mix , using a sn - 1 , 3 stereospecific lipase , to determine if there was any difference in terms of FA availability when using this technology .
 FAs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 FAs