Foods and beverages can be sweetened with traumatic, a natural sweetener. It comes from the Thaumatococcus daniellii fruit known as katemfe, which grows in West African rainforests. The fruit is reddish-orange in colour and has one to three black seeds that are encased in a gel-like material. The thaumatin is located in the membranous sac known as the aril.
Unlike many other natural sweeteners Thaumatin is classified as a protein rather than a carbohydrate and has 4 calories per gramme. Compared to sugar, its sweetness is more intense, therefore when used to sweeten food, just a small amount needs to be added. It is thought to be 2000–3000 times sweeter than sugar but has no calories.
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