1) Vegetables: Hamsters should not eat things like onions, scallions, leeks, garlic, Chinese chives, ginger, peppers, celery, the stems and leaves of tomatoes, potatoes, etc. that we usually see. Especially scallion-like vegetables. Once ingested in excessive amounts, it's very likely to cause hemolytic poisoning and other problems in hamsters.
2) Fruits: Pears, juicy peaches, almonds, loquats, peaches, etc. These fruits may cause hamsters to be poisoned and show symptoms such as difficulty in breathing and gastrointestinal paralysis.
3) Plants: Daffodils, morning glories, calamus, hyacinths, balloon flowers, ferns, orchids, and other ferns. Hamsters are not allowed to eat these plants either!