2.25 identify the sources and describe the functions of carbohydrate, protein, lipid (fats and oils), vitamins A, C and D, the mineral ions calcium and iron, water and dietary fibre as components of the diet

Diet	Function	Deficiency
Carbohydrates	Direct energy	Low blood sugar (Hypoglycemia)
Protein	Growth and repair	Marasmus (severe malnutrition, causes abnormal weight loss)
Lipids	Insulation and energy storage	Eating disorder
Water	For chemical reactions to take place (aerobic respiration requires water!)	Dehydration
Vitamin A	Healthy eyesight	Night Blindness
Vitamin C	Heal wounds and healthy skin	Scurvy
Vitamin D	Strengthen bones and teeth	Rickets
Calcium	Healthy bones and teeth	Rickets
Iron	Promote hemoglobin	Anaemia
Dietary Fibre	Help digestion	Constipation