People mistakenly consider that food and some corporations support this misconception to exploit it for profit. Some people mistakenly consider silicagel food a

People mistakenly consider that food and some corporations support this misconception to exploit it for profit. Some people mistakenly consider silicagel food as well (there would be no need to write "do not eat" on it if nobody did) but this doesn't mean it actually is food. Some even say cocaine is a vitamin. There are many substances which occur in our bodies naturally and play important roles in its functioning but are not foods. For example thyroxine is not a food as well, although our bodies produce and use it in some amounts for vital purposes. Same way sugar.