Vitamin B1 is also known as thiamine or anti-neuritis. A pyrimidine ring and thiazole ring combined with a B vitamin. It is a white crystalline or crystalline powder; there is a slight special odor, bitter taste, and a moist primer, exposed to the air, easily absorbing moisture. It is easy to decompose and deteriorate in alkaline solution. Acidity and alkalinity can withstand high temperature of 100 degrees Celsius at 3.5, acid-base more than 5 is easy to failure. The light and heat valence decreased. It should be placed in shading, cool place, should not be stored for a long time. It is stable in acidic solution, unstable in alkaline solution, easily oxidized and destroyed by heat. Vitamin B1 is mainly found in the skin and germ of the seed, such as in rice bran and bran, and is abundant in yeast. Lean meat, cabbage and celery are also rich in content.