There is a scientific consensus[1][2][3][4] that currently available food derived from GM crops poses no greater risk to human health than conventional food,[5][6][7][8][9] but that each GM food needs to be tested on a case-by-case basis before introduction.[10][11][12] Nonetheless, members of the public are much less likely than scientists to perceive GM foods as safe.[13][14][15][16] The legal and regulatory status of GM foods varies by country, with some nations banning or restricting them, and others permitting them with widely differing degrees of regulation.[17][18][19][20]