Chapter 20 Clinical nutrition
Vitamin deficiencies
Vitamin deficiency states can arise as a result of:
• inadequate intake (with normal requirements)
• impaired metabolism (if metabolism is necessary for function)
Water-soluble vitamins
Vitamin B1 (thiamin)
Case history 20.1
Investigations
Red cell transketolase activity: | |
without added thiamin pyrophosphate | 2.0 mmol/h/109 red cells |
with added thiamin pyrophosphate | 2.4 mmol/h/109 red cells |