I recently thought I was ordering Potatoes Not Prozac, received Little Sugar Addicts instead but decided to read it even though my child-rearing years are long gone (and let's hope they don't come again for some reason when I'm in my dotage :!: )
My dear friend and co-worker has a 10-year old daughter who has behaviors that are nearly blow-by-blow descriptions of those in Katherine's book. However, after much discussion, we correlated these crashes not to food, but to the girl's long-distance telephone conversations with her father. My friend left him when the child was an infant because of life-threatening abuse, but she still must allow contact, visitation, etc.
When the girl got home from an 8-week visit at the end of August, she had a series of tantrums over several days, one of which lasted for HOURS.
She and her mom have been going to counseling since September, but the outbursts continue.
My very non-professional opinion is when talking to her father, the girl is experiencing a flight-fight-or-freeze situation, a huge adrenaline dump into her bloodsteam along with all the hormones/chemicals that get triggered by that, some of which are also implicated in sugar rushes. If that's the case, it's not hard to see that a crash isn't far behind.
At this point, not much can be done about contact with the father - if the child doesn't speak to him when he calls, he phones continually until she does talk with him. He's done cute stuff, like threaten suicide because she let him down in some minor matter, etc.
Hopefully the counselling will help and eventually a case be built to overturn his visitation rights, or she'll survive for a few more years until she gets to decide for herself.
Right now, she's also involved in dance and gymnastics, so she's getting some good physical workouts.
Her mom is reading Little Sugar Addicts, at least as soon as I'm done with it, already buys/uses very little sugar products, etc. but is there anything you can think of that might be done nutritionally to help this child through these always unpredictably-timed calls and their fallout? - hand her a piece of cheese or a boiled egg while she talks to him? Dose her with valerian as soon as the phone rings?
It's very painful to watch the toll this is taking on an otherwise well-functioning family and I think my friend would quickly try to implement any suggestions to help make the situation better.