What it does: Helps balance blood sugar, normalise hunger and reduce cravings, improves lifespan, helps protect cells, essential for heart function.

Deficiency Signs: Excessive or cold sweats, dizziness or irritability after six hours without food, need for frequent meals, cold hands, need for excessive sleep or drowsiness during the day, excessive thirst, addicted to sweet foods.

Best food sources: Brewer’s yeast, wholemeal bread, rye bread, oysters, potatoes, wheatgerm, green peppers, eggs, chicken, apples, butter, parsnips, cornmeal, lamb, cheese.