The claim is from Joe & the juice https://www.joejuice.com/
in Solihull west midlands UK,
I took my elderly mother into their establishment and asked for an orange juice . They dont do orange juice as apparently it is not healthy for you . I asked why it isn't healthy , and he said 'its been proven scientifically that oranges are not good for you and so we dont sell them , but you can have grapefruit instead' I asked where he had got the evidence from and he couldn't answer .
My mother who is 80 , could not understand it , and she hates grapefruit !

Please help !

Update 2016-12-02