UPDATE 26th April 2018: To clarify claims that animal bones are used to produce sugar:
In Europe and America, 99% of sugar is made from sugar beet:
Bone char filters are not used to process beet sugar, because this type of sugar doesn’t require the same extensive decolorization. Instead the beets’ juice is removed through use of a diffuser and mixed with additives to make the juice crystalize. (https://www.huffingtonpost.com/2015/01/05/sugar-vegan-bone-char-yikes_n_6391496.html
Bone char—often referred to as natural carbon—is widely used by the sugar industry as a decolorizing filter, which allows the sugar cane to achieve a white color. Bone char is made from the bones of cattle who were slaughtered in foreign countries and sold to traders in other foreign countries, who then sell the bones back to the U.S. sugar industry. Typically, sugar is made from sugarcane, sugar beets, or coconuts
. Beet and coconut sugar are never processed with bone char. (https://www.peta.org/living/food/is-sugar-vegan/)
I had interesting email conversation in last few says.
White sugar is an intoxicating substance
In the four regulatory principles of Prabhupada, there is "not to take intoxicants": alcohol, coffee, tea, drugs, smoking. He did not know that white sugar is whitened with lime without the knowledge of consumers, because there is no written in the ingredients. So for this reason ISKCON is used in temples, but it is time for it to be counted among the intoxicants and be replaced with other untreated sweeteners or fructose which is very cheap.