Recommend patients with IBS to eat regular meals with a healthy, balanced diet, and to adjust their fibre intake according to symptoms NICE CKS.
Advise drinking an adequate amount of fluids, especially water or non-caffeinated drinks, and to limit tea and coffee to 3 cups per day NICE CKS.
Suggest reducing intake of insoluble fibre, such as wholemeal or high-fibre flour and breads, cereals high in bran, and whole grains like brown rice, especially if symptoms of diarrhoea or bloating predominate NICE CKS.
Consider reducing foods that may exacerbate symptoms, such as caffeine, alcohol, carbonated drinks, and gas-producing foods NICE CKS.
If constipation is predominant, advise trying soluble fibre supplements (e.g., ispaghula) or foods high in soluble fibre (e.g., oats and linseed), with gradual increase to minimize bloating NICE CKS.
Encourage regular physical activity, aiming for at least 30 minutes of moderate exercise on 5 days per week, as it may reduce stress and improve symptoms NICE CKS.
Advise patients to identify and manage stress, anxiety, and depression, and create opportunities for relaxation NICE CKS.