How do I help Dd17 with her sweet tooth

[GizmoIsSoFluffy]

I'll keep it brief.
She is at college, doesn't eat breakfast or lunch. Eats homemade tea. Any lunch I make just gets binned by her.
Plenty of choice of food in the house, healthy and junk food, she just prefers her stash. She works at weekend's, so pays for it all herself. Been sweet based for about 5 years now, but the breakfast etc is only the past 2 years.
Just found this stash in her room...
We don't know how to handle it, anyone been through this???

I’d say this is disordered eating as seems so extreme. I wonder if you could contact Beat (ED charity) to seek a professional opinion and get advice? I’d not confront DD about it until you’ve got advice. This will be so damaging to her health so has to be addressed but done properly.

So many unopened little packets! Is she eating them all, or gifting them? You need to ask her.