It is largely made up of protein and essential amino acids, and is typically recommended to vegetarians due to its high natural iron content. (wellnessmama.com)
In the case of eating soil, this is particularly evident in breeds which have known natural iron deficiencies, and this demonstrates how they may be seeking extra dietary iron in clay soils. (petpeoplesplace.com)
Simple, the benefits come as a result of its high natural iron and protein content. (gymjunkies.com)