Complex sentence: When evaluating environmental toxins such as heavy metals, the USDA has noted that organically raised chicken may have lower arsenic levels, while early literature reviews found no significant evidence that levels of arsenic, cadmium or other heavy metals differed significantly between organic and conventional food products.
Split into simpler sentences: When evaluating environmental toxins such as heavy metals, the USDA has noted that organically raised chicken may have lower arsenic levels. Early literature reviews found no significant evidence that levels of arsenic, cadmium or other heavy metals differed significantly between organic and conventional food products.