Despite facing criticism, Budwig continued to practice and advocate for her protocol, attracting a dedicated following of patients and alternative health practitioners.

Johanna Budwig passed away in Germany at the age of 95. The cause of death is not widely available, but it is known that she remained active in promoting her theories until her final years.

The Budwig Protocol remains a popular alternative cancer treatment, although its efficacy remains scientifically unproven. It continues to be promoted and practiced by some individuals and alternative health practitioners worldwide. Its place in cancer treatment remains highly controversial.