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People who eat a varied diet are unlikely to develop a severe primary vitamin deficiency, but may be consuming less than the recommended amounts; a national food and supplement survey conducted in the US over 2003–2006 reported that over 90% of individuals who did not consume vitamin supplements were found to have inadequate levels of some of ...
1906 – Frederick Hopkins suggests the existence of vitamins and suggests that a lack of vitamins causes scurvy and rickets; 1907 – Paul Ehrlich develops a chemotherapeutic cure for sleeping sickness; 1907 – Henry Stanley Plummer develops the first structured patient record and clinical number (Mayo clinic)
Living at a time when vitamins were unknown, he asked and tried to answer the questions, "How many dietary essentials are there, and what are they?" [3] He and Marguerite Davis discovered the first vitamin, named A, in 1913. McCollum also helped to discover vitamin B and vitamin D and worked out the effect of trace elements in the diet.
There are some vitamins that come with special storage instructions, so it’s important to thoroughly read labels, Davis-Cadogan says. ... and air are the “main enemies of vitamin freshness ...
Health. Home & Garden
The history of biology traces the study of the living world from ancient to modern times. Although the concept of biology as a single coherent field arose in the 19th century, the biological sciences emerged from traditions of medicine and natural history reaching back to Ayurveda, ancient Egyptian medicine and the works of Aristotle, Theophrastus and Galen in the ancient Greco-Roman world.
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history
1933 – Tadeus Reichstein artificially synthesized vitamin C; first vitamin synthesis. 1935 – Rudolf Schoenheimer used deuterium as a tracer to examine the fat storage system of rats. 1935 – Wendell Stanley crystallized the tobacco mosaic virus. 1935 – Konrad Lorenz described the imprinting behavior of young birds.