For all of you who did not take zinc to regain/protect taste read on:
here is a study (2007)
Zinc Doesn't Help Head And Neck Cancer Patients - Study Shows
Previous academic studies have suggested that the use of zinc sulfate could help patients regain their sense of taste more quickly after radiation therapy. Doctors in this phase three, multi-institutional, double-blind, placebo-controlled study found that giving patients a zinc sulfate vitamin supplement had little to no effect on the sense of taste for the patients in the study.
International Journal for Radiation Oncology*Biology*Physics, the official journal of The American Society for Therapeutic Radiology and Oncology (ASTRO).
http://www.medicalnewstoday.com/articles/66869.phpM