Young meat is considered unfit for human consumption by the European Union:
"derives from animals which are dead before slaughter, stillborn, unborn or slaughtered under the age of seven days;" Chapter V, EC 854/2004 [PDF], page 22.
According to a photocopy I have: "The meat is pale, bland and gelatinous. The bones are bland. The fats are grey and filthy. These meats do not have nutritious value and provoke diarrhoea." I do not have a reference for this quote.
The question is whether there is objective evidence supporting this claim. What is the European legislation based on?
Added (note the 'may'):
decisions concerning meat. All meat which may constitute a danger to human health shall be declared unfit for human consumption. This includes meat from animals which have not undergone ante-mortem inspection (excluding wild game), meat from animals whose offal has not undergone post-mortem inspection, meat from animals which were dead before slaughter, stillborn, unborn or slaughtered under the age of seven days, meat from animals affected by a notifiable animal disease, meat not in conformity with the biological and radioactivity criteria, meat containing specified risk materials, chemical residues or veterinary medicinal products in excess of the permitted limits. In addition, the veterinarian may impose requirements concerning the use of meat derived from animals having undergone emergency slaughter outside the slaughterhouse.