Complex sentence: From these children she used everything that she could, the fat, the blood, the hair, the bones (that normally she turned into powder); for this reason she did not have problems disposing of the bodies of her victims.
Split into simpler sentences: From these children she used everything that she could; the fat, blood, hair, and bones (that normally she turned into powder). For this reason, she did not have problems disposing of the bodies of her victims.