A diet that is low in essential vitamins and minerals and high in acid forming foods will reflect results in acidic urine. (paleodietfoodlist.net)
In a nutshell, the alkaline diet is all about eating in a way that helps to optimise your body's natural pH balance, by reducing the amount of acid forming foods we consume — packet and processed foods, red meat, alcohol, coffee — and increasing those that are alkaline forming, such as fresh leafy greens, carrots, avocado, beetroot and quinoa. (byrdie.co.uk)
They are highly nutritious, non-glutinous and not acid forming foods. (lovefoodeat.com)