Do I necessarily need a degree to work as a nutritionist?

No. You don't necessarily need a degree from a university of applied sciences to work as a nutrition consultant. There are also training courses with other qualifications, for example school qualifications, such as nutrition coaches.

If you intend to work in the field of "Eating Healthy" and settle your treatment costs via supplementary health insurance, you must ensure that the training complies with the health insurance guidelines for the recognition of alternative and complementary medical services.

The schools will be happy to inform you about the details.