White sugar

From EatBibek

The natural cane sugar is brown in color. However, to make it look appealing to consumers, manufacturers use animal bone char to whiten the color. The result is white color of the cane sugar. To assure that the sugar is vegetarian, buy turbinado/raw cane sugar. Beet sugar is naturally white in color. You may also use pure maple syrup as a substitute. But do make sure that it's pure maple syrup. Sometimes, manufacturers use lard to smooth the consistency of the syrup.

Bone char is used to remove fluoride from water and to filter aquarium water.

It is often used in the sugar refining industry for decolorizing (a process patented by Louis Constant in 1812). This is a concern for vegans and vegetarians, since about a quarter of the sugar in the US is processed using bone char as a filter (about half of all sugar from sugar cane is processed with bone char, the rest with activated carbon). As bone char does not get into the sugar, sugar processed this way is considered parve/Kosher. Sugar processed in Australia does not use bone char. In Canada, Rogers and Lactania sugar is producted using bone char; the only vegan sugar is Redpat