INS and cystic fibrosis: For most of the participants, eating is primarily focused on how to prioritise CF needs, namely maintaining or gaining weight; the needs or requirements of other conditions were, unsurprisingly, seen as secondary to the primary focus of CF as Geraint explains:Geraint (M, Aged 31, BMI 22): I haven’t tried any particular diet ‘cause what I eat is good enough anyway, so I was like maybe I should try, but the Nurse said just “look, have your insulin if you like it”, so I just went back and had what I wanted.