As well as being a well documented cause of mottled teeth, fluoride overload is also associated with a range of other symptoms. In his book, Fluoridation: the Great Dilemma, the late Dr George Waldbott lists the following symptoms. Their severity and duration will depend on an individual's age, nutritional status, environment, kidney function and susceptibility to allergies.

Chronic fatigue not relieved by extra sleep or restHeadaches

Dryness of throat and excessive water consumption

Frequent need to urinate

Aches and stiffness in muscles/bones

Muscular weakness and spasms

Gastrointestinal disturbances, including diarrhoea and constipation

Pinkish red or bluish red spots on the skin, which fade after around a week

Skin rash or itching after bathing

Dizziness

Visual disturbances

1)If you are displaying what you believe are symptoms, have your fluoride levels tested. Currently, this test is only available from Good Healthkeeping in Lincolnshire at £9 and £5 for a follow up test (0507 327655).

2)If you live in a fluoridated area, your only option is to use solely bottled water; or fit a reverse osmosis water purifier in your home (again available from Good Healthkeeping at around £300, plus the cost of renewing the filter membrane every six months). Both options are expensive. You may also purchase a service which will deliver bottled mineral water and supply a dispenser for £20-£30 a month.

3)Reduce your intake of tea and soft drinks. Drink herbal tea made with non fluoridated water instead.

4)Switch to a non fluoridated toothpaste. Never let children use "adult" fluoride toothpaste.

5)Check your nutritional status. A poor diet will only increase your susceptibility to symptoms of fluoride poisoning. Adequate levels of magnesium, zinc and iron will help your body counter the effects of fluoride.

6)Watch your consumption of prepared foods, particularly frozen vegetables.

7)Never use fluoridated water for baby formula (another good argument for breastfeeding).