If you were to injest just 2-5 grams of sodium fluoride (a common ingredient in toothpaste), you would definitely die.
Is actually possible to something both of you can observe. However, you can learn the right way to perform these tasks yourself. https://Bookmarklinx.com/story17826728/remonamcgovern4-%D0%98%D0%BD%D1%82%D0%B5%D1%80%D0%BD%D0%B5%D1%82-%D0%BF%D1%80%D0%BE%D0%B2%D0%B0%D0%B9%D0%B4%D0%B5%D1%80-%D0%9C%D0%A3%D0%9B%D0%AC%D0%A2%D0%98%D0%9D%D0%95%D0%A2-%D0%9B%D0%A3%D0%93%D0%90%D0%9D%D0%ACml