Scurvy on a diet devoid or nearly devoid of vitamin C, had blood levels of vitamin C too low to be accurately measured when they developed signs of scurvy, and in the Iowa study, at this time were estimated (by labeled vitamin C dilution) to have a body pool of less than 300 mg, with daily turnover of only 2.5 mg/day. The vast majority of animals and plants are able to synthesize vitamin C, through a sequence of enzyme-driven steps, which convert monosaccharides to vitamin C. However, some mammals have lost the ability to synthesize vitamin C, notably simians and tarsiers.
History of the Royal Navy and England's Royal Navy were organised as one force, though not technically merged, as a consequence of the Union of the Crowns when James VI of Scotland became King of England also, as James I. Though the Lord of the Isles had a large fleet of galleys in the 13th and 14th centuries, there appears little or no trace of a Scots navy during the Wars of Scottish Independence. With Scottish independence established, Robert the Bruce turned his attention to the upbuilding of Scots shipping and of a Scots navy. In his later days he visited the Western Isles, which