To cite package ‘nutrition’ in publications use:

  Leoncio W (2023). _nutrition: Useful Functions for People on a Diet_.
  R package version 1.1.0, <https://github.com/wleoncio/nutrition>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {nutrition: Useful Functions for People on a Diet},
    author = {Waldir Leoncio},
    year = {2023},
    note = {R package version 1.1.0},
    url = {https://github.com/wleoncio/nutrition},
  }