A rare sugar is a sugar that occurs in limited quantities in nature.[2] Rare sugars can be made using enzymes, choosing which enzymes to use if you know the substrate can be aided by the Izumoring-strategy.[3]
^"Rare Sugar Sweet". Matsutani. Matsutani Chemical Industry Co., Ltd. Retrieved 26 January 2021.
^ a b cNagata Y, Mizuta N, Kanasaki A, Tanaka K. (March 2018). "Rare sugars, d-allulose, d-tagatose and d-sorbose, differently modulate lipid metabolism in rats". J Sci Food Agric. 98 (5): 2020–2026. doi:10.1002/jsfa.8687. PMID 28940418 – via NIH National Library of Medicine.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^Matso, Tatsuhiro; Suzuki, Hiroo (2002). "D-Psicose Is a Rare Sugar That Provides No Energy to Growing Rats". Journal of Nutritional Science and Vitaminology. 48 (1): 77–80. doi:10.3177/jnsv.48.77. PMID 12026195 – via J-Stage.