Complex sentence: The nutrient content of tarhana depends upon yogurt and flour ratios as well as some other ingredients, and it is also considered to be a useful high-protein dietary supplement with average 15% protein content.
Split into simpler sentences: The nutrient content of tarhana depends upon yogurt and flour ratios as well as some other ingredients. It is also considered to be a useful high-protein dietary supplement with average 15% protein content.