The flakes might be just shed. Without a picture it's hard to tell... Does she have a humid hide? If she's shedding, she won't eat for a day or two; that's normal. She's eating her shed.
How long have you had her? New leos sometimes don't eat in the beginning, when they're still getting used to their new environment. If you had her for longer than a week, maybe try waxworms. Does her tail look thin or normal?
Chrissy