Dry, brittle, and breaking
The most likely cause of hair that looks dull and "fried" is that it actually is. Hair can easily be damaged by styling tools like hot irons, chemicals from perms and coloring procedures, or severe hairstyles (tight ponytails). It's also important to note your diet, though, as not enough protein will cause hair strands to be weak and not getting enough fatty acids will cause hair to lack resilience and shine.
