- weight loss
- vomiting
- abdominal bloating and pain
- persistent diarrhoea or constipation
- pale, fatty, foul-smelling stools
- iron-deficiency anaemia
- joint pain and stiffness
- weak, brittle bones
- fatigue
- skin disorders
- numbness and tingling in the hands and feet
- tooth discolouration or loss of enamel
- pale sores inside the mouth
- irregular menstrual periods
- infertility and miscarriage