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jane, I bought a stack of Tagatose at the time (from the US). I've just spent 40 or so minutes looking for it again, and it seems to have disappeared.
The same company that is said to be producing Tagatose is also producing Allulose (D-allulose, aka D-Psicose). Perhaps they have found the production cost of allulose is cheaper...?
At any rate, there's the similar product Allulose - equally a natural sweetener (monosaccharide occurring naturally but rarely) - that's a ketohexose. It's the epimer of fructose - you can see the opposite configuration of the -OH at the 3-position. The 2D images below show the similarity in structure, while the 3D images show the opposite configuration at C3.
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| C₆H₁₂O₆ (D-Psicose) | C₆H₁₂O₆ (D-Fructose) |
It is 70% as sweet as sucrose, but only has 10% (roughly) of its caloric value. Very low GI, and interestingly it appears to have antihyperglycaemic properties; it might also be an antihyperlipidaemic agent.
It caramelises just as sugar does. Unlike such sweeteners as stevia, or aspartame, or xylitol etc., it will undergo the Maillard reaction. There's no bitter after-taste; it tastes like sugar.
iHerb have it available (RxSugar, Whole Allulose, Health Garden Allulose - beware of the others, as they seem to incorporate other ingredients as well).
