I have mild Addison's disease caused by underactive adrenal glands, for which I take two varieties of steroids. Despite this, I am sluggish on waking until I take steroids. Can you help?

Avoid alcohol, caffeine and tobacco, which are toxic to the adrenals, as well as fried and processed food, meat, sugar and white flour. Eat lots of fresh fruit and green leafy vegetables. Try to reduce stress, which overworks the adrenals, and take moderate daily exercise to stimulate them. Adrenal Support by Metabolics (available from The Nutri Centre, 0800 587 2290; 60 capsules for £13.99) will help the endocrine system as well as the adrenal glands.

I have read that carbonated water is not good for you. I drink around two-three litres a day. Is this a problem?

Carbonated water contains carbon dioxide (a waste product) which with the water forms carbonic acid. It can cause indigestion, bloating, arthritis, osteoporosis, and urinary problems. However, drinking around three litres of pure still filtered water a day makes a vital contribution to health. It helps eliminate toxins, boosts immunity and minimises the detrimental effects of alcohol, drugs and processed foods. I advise you to install a water filter (Fresh Water Filter company, 020-8597 3223) and drink still water instead.

Emma Mitchell is a natural health therapist. Send your questions to Wellbeing, Guardian Weekend, 119 Farringdon Road, London EC1R 3ER. Email: weekend@theguardian.com.