I just convinced a friend to try paleo about 2 weeks ago. She complains that she is always hungry and tired and didn't think she was losing any weight. I listened to what she was eating and I figured out she was eating too much nuts and not enough animal protein. Even after correcting this she still says she is always hungry and tired. It has been two weeks so far and I feel bad just telling her to wait longer and it will go away. How long can carb flu last? Is there anything that can be done to end it sooner?