Effects on cooking

Vitamin	Souluble in water	Stable to Air Exposure	Stable to Light Exposure	Stable to Heat Exposure
Vitamin A	no	partially	partially	relatively stable
Vitamin B1	highly	no	N/A	no
Vitamin B2	slightly	no	in solution	> 100 °C
Vitamin B3	yes	no	no	no
Vitamin B5	quite stable	no	no	no
Vitamin B6	yes	N/A	yes	yes
Vitamin B7	somewhat	N/A	N/A	< 160 °C
Vitamin B9	yes	N/A	when dry	no
Vitamin B12	yes	N/A	yes	at high temp
Vitamin C	very unstable	yes	no	no
Vitamin D	no	no	no	no
Vitamin E	no	yes	yes	no
Vitamin K	no	no	yes	no