Prefer a squeeze of lemon juice in tea. Especially in Darjeeling or Sikkim.
A dash of single cream in coffee - in practice Elmlea because it keeps well, but is mainly vegetable oil based.
If I do use milk, for example on ceerals, then it has to be full milk. We tried semi skimmed some years ago and I started to to get arthritic pains in my fingers. The vitamins A & D dissolve in fat, so skimming the milk removes these. Going back to full milk resolved the problem.