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 medicine in the Philippines surveyors of herbal medicines at the localities where they were assigned. Common disease during the Spanish period in the Philippines were diarrhea, dysentery, and leprosy. There were also the presence of cholera, inﬂuenza, smallpox, beri-beri, dysentery, bubonic plague, scurvy, rheumatism, asthma, syphilis, tetanus, toothache, and ulcers. Many Filipinos believed in "pasma" (a resulting condition similar to spasm which involves the occurrence of hand tremors, sweaty palms, numbness and pains after the body's exposure to "unhealthy cold" and water), the state of "nausog" ("distress" caused by an unfamiliar person), and "personalistic sorcery". It was in 1830 when the "true pharmacies" were