Dry and brittle hair

I wonder if I'm lacking nutrition.

My hair feels drier and more frizzy these days.

What should I do in a situation like this?

I envy people with long, flowing hair.

I want to be bouncy too, but

I have thin hair, and rather than silky

It's so dry and brittle ㅠㅠ Every single strand looks so lifeless.

Should I try applying a nutritional supplement?

Or should I take nutritional supplements for inner beauty?