Student or Learner
This is the title of an article which I am working on, "Study on of the association between vitamin D intake and serum 25 hydroxy-cholecalciferol density and risk of breast cancer." would you please tell me if there is something wrong with it? Isn't it better to change the last "and" to "with"?
Please be aware that I'm neither a native English speaker nor a teacher.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.