L- arabinose and xylose are low-energy five-carbon sugars, which can hardly be digested and absorbed by human body. L- arabinose is an inhibitor of sucrose digestive enzymes, which can selectively inhibit the activity of sucrase. Undigested sucrose and L- arabinose directly enter the large intestine and are fermented by microorganisms to produce short-chain fatty acids, which have the functions of expelling toxin, slimming, clearing intestine, inhibiting fat, lowering blood sugar and relieving alcoholism.