Complex sentence: This layer of the adrenal cortex is thought to be the primary source of serum DHEA-S. DHEA-S levels decline as a person ages as the reticularis layer diminishes in size.
Split into simpler sentences: This layer of the adrenal cortex is thought to be the primary source of serum DHEA-sulfate. DHEA sulfate levels decline as a person ages as the reticularis layer diminishes in size.