The decreased swelling power of starch with the addition of monoglyceride can be attributed to the formation of amylose–monoglyceride complex, which was assumed to deposit as an insoluble film on the granule surface and delay the transportation of water into the granules (Eliasson & Krog, 1985). The lower swelling power of NWS–PA sample could be attributed to the longer and more stable helices formed between amylose and PA, which was assumed to inhibit swelling of starch granules more effectively than helices formed between amylose and two other shorter chain fatty acids.