An acidic body fails to absorb minerals and nutrients; cells loose energy and fail to repair themselves, arteries deteriorate, cancers and other autoimmune diseases develop.
A body under emotional stress, toxic overload or immune reactions will deteriorate into an acidic condition. Unless an alkaline inducing diet is maintained, the body will seek alkaline minerals, from within itself, (such as calcium) to bring back a balance.
The modern western diet is high in acid producing foods. The biggest culprits being meat, fish, eggs, and milk products, followed by processed foods such as vegetable oils, artificial milks, white flour, sugar, artificial sweeteners, coffee and alcohol.
Alkaline forming foods include almost all plant based whole foods.
The pH level of a particular food is not a measure of its acid or alkaline forming tendency in the body; even citrus and other apparently acidic fruits have an alkalinizing effect once digested. Milk on the other hand dramatically changes to acid in the stomach is so that milk's own calcium component fails to provide an alkaline buffer and the body uses bone calcium to achieve a balance. (NZ has one of the highest scores of broken hips in the world)
Body pH is a sure indicator as to health and proof is to be found in the extreme health and longevity of vegans.