Vitamin A

• Responsible for epithelial proliferation, keratinsation and development

Sources

• Animal - milk, liver, eggs, oily fish
• Plant - green leafy veg, bright yellow/orange fruit

Clinical features

• Keratotic follicular papules on the thighs and upper arms
• Dry skin

Investigations

• Measure serum vitamin A

Vitamin K

• Essential cofactor for several blood coagulation factors

Sources

• Green leafy veg
• Liver
• Legumes
• Vegetable oils
• Also produced in GI tract by bacteria - can be affected by prolonged antibiotics

Clinical features

• Bleeding tendency, seen in the skin as purpura and easy bruising