TY - JOUR AB - In 1912 Sir Frederick Gowland Hopkins reopened the whole question, and investigated again the effects on animals of a synthetic diet. Again he demonstrated the importance of the addition of milk, and in addition he pointed out the importance of the proteins and that some were capable of maintaining life whilst others were inadequate so that animals failed to grow when fed on them. Through this work he systematised previous work and also added an important contribution to our knowledge of nutrition by his discovery of the essential amino acids. These have been extensively studied in recent years, and the following are now regarded as being essential, according to a table by William C. Rose:— VL - 42 IS - 4 SN - 0007-070X DO - 10.1108/eb011340 UR - https://doi.org/10.1108/eb011340 PY - 1940 Y1 - 1940/01/01 TI - British Food Journal Volume 42 Issue 4 1940 T2 - British Food Journal PB - MCB UP Ltd SP - 31 EP - 40 Y2 - 2024/04/24 ER -