Although the idea of formal research, testing, and verification is now well established, it was not always so. Scurvy, a deficiency disease caused by inadequate intake of vitamin C, was a constant problem for the British Navy. Yet because there was no formal process of testing possible cures and adopting what worked, it would take 200 years for the simple solution, a daily dose of lime juice, to be adopted. Individual commanders repeatedly discovered this preventative but could not get it accepted by the Navy bureaucracy. As a result, during the Seven Years' War of 1756–1763, of the 185,000 men who served aboard Royal Navy ships in that war, 120,000 died of scurvy. So much for the Age of Enlightenment.