Type 1 DM simply means that her pancreas isn't producing insulin which is a hormone that we all need. For her it needs to be supplemented. At present insulin is available only in injectable form. And there is no other treatment modality. Alternative forms of insulin like oral tablets or sprays are still under development. In future we may not need to inject insulin. Other area of research is stem cell therapy which is still under development. For now u should continue with insulin till the time we have a better alternative