Nutrition Flashcards
What is vitamin B6
Vitamin B6 is a water soluble vitamin of the B complex group.
It is converted to pyridoxal phosphate (PLP) which is a cofactor for many reactions including transamination, deamination and decarboxylation.
Causes of vitamin B6 deficiency
isoniazid therapy
Consequences of vitamin B6 deficiency
peripheral neuropathy
sideroblastic anemia
vitamin B6 is also known as
pyridoxine
Vitamin C is also known as
ascorbic acid
Vitamin C Functions
antioxidant
collagen synthesis
facilitates iron absorption
cofactor for norepinephrine synthesis
Vitamin C deficiency (scurvy) leads to
defective synthesis of collagen resulting in capillary fragility (bleeding tendency) and poor wound healing
Features vitamin C deficiency
gingivitis, loose teeth
poor wound healing
bleeding from gums, haematuria, epistaxis
general malaise
Vitamin A is water solubke
false
fat soluble
Vitamin A/retinol Functions
converted into retinal, an important visual pigment
important in epithelial cell differentiation
antioxidant
Consequences of vitamin A deficiency
night blindness
Name all the Vitamin B types
B3 Niacin B6 Pyroxidine B7 Biotin B9 Folic Acid B12 Cyanocobalamin
Deficiency of Thiamine leads to?
Beriberi
polyneuropathy, Wernicke-Korsakoff syndrome
heart failure
Deficiency of Niacin leads to?
Pellagra
dermatitis
diarrhoea
dementia
Deficiency of Pyridoxine leads to?
Anaemia, irritability, seizures
Deficiency of Biotin leads to?
Dermatitis, seborrhoea