Table 2: Stability of six water-soluble vitamins.

Storage time (d)Nicotinic acidNicotinamideFolic acidPyridoxineRiboflavinThiamine

198.70 ± 0.0597.54 ± 0.1499.83 ± 0.2198.58 ± 0.0297.66 ± 1.1099.24 ± 0.20
296.57 ± 0.0396.03 ± 0.0289.01 ± 0.0296.12 ± 0.5495.69 ± 0.5297.10 ± 0.66
394.29 ± 0.1292.12 ± 0.2463.38 ± 0.0593.03 ± 0.8694.44 ± 0.9995.93 ± 1.65
485.32 ± 0.0883.66 ± 1.0360.93 ± 1.2184.42 ± 0.3984.93 ± 1.6387.18 ± 1.87
570.85 ± 0.0773.25 ± 0.0856.24 ± 0.3473.15 ± 1.0971.03 ± 0.8372.93 ± 0.39
663.03 ± 0.1667.26 ± 0.1252.62 ± 0.4465.05 ± 1.2166.38 ± 0.4162.01 ± 0.33
759.63 ± 0.1359.90 ± 1.0849.59 ± 0.2060.99 ± 0.5058.99 ± 0.6259.56 ± 0.72