FINDING NO-ALLERGY DIET: COULD IT BE YOUR WATER?
April 7th, 2009If you’ve tried everything and still can’t pin down the cause of your problems, give some thought to the water you’re drinking – and cooking with, and brushing your teeth with. Tap water is likely to contain chemicals that are deliberately added (chlorine or fluoride), plus industrial wastes and agricultural chemicals (like formaldehyde) that inevitably seep into local water supplies. And that goes for wells, springs, rivers or reservoirs, too.
(Incidentally, if you find you are allergic to fluoride – only a few people are – you’ll also have to avoid fluoride in toothpaste, vitamin supplements and dental treatments.)
As a vehicle for so many substances – even in amounts well below so-called toxic levels – tap water has been known to aggravate allergy in highly sensitive people.
William J. Rea, a cardiovascular (heart) doctor in Dallas, Texas, specializing in environmentally triggered reactions, has seen a whole slew of symptoms squarely attributed to something in the water – everything from hay fever, post-nasal drip, bronchitis and asthma to mouth pain, mouth ulcers, nausea, diarrhoea, bloating and urinary problems, among others.
We hope you aren’t that sensitive. But water is certainly something to take into account when trying to solve unexplained problems.
The ideal method of testing for water allergy is to fast for two days in a controlled setting – a hospital unit free of airborne contamination – and then sample various waters such as tap water, bottled water and so on to determine which do and which don’t cause problems. For home testing, you can start by substituting bottled spring water for tap water for four or five days and see if your symptoms subside. Be sure to buy bottled water in glass containers, not plastic, which leaches chemicals into the water. Even that precaution may be in vain, however. ‘Bottled spring water is transported in plastic-lined trucks and stored in plastic vats, then bottled in glass,’ says Dr Rea. So if symptoms persist, switch to another brand until you find one you can tolerate.
‘We try to encourage people to drink the least expensive water they can tolerate, because they have to not only drink it, but cook their food in it and wash in it,’ says Sue Herbig, R.N., assistant to Dr Rea and general manager of the Ecology Unit at Carrolton Community Hospital in Carrolton, Texas, a small community near Dallas.
Of course, anything you can do to purify your tap water is likely to be cheaper in the long run than going through stockpiles of bottled water daily. For some people, ousting allergenic substances from their tap water is as easy as boiling it for thirty minutes or storing it in an uncovered glass pitcher in the refrigerator overnight to allow the volatile chemicals to escape. Others will have to look into home water-treatment equipment.
Running your tap water through ordinary charcoal filters won’t do the job unless the charcoal is combined with some other purification material, such as activated carbon. In fact, you might as well skip the charcoal and just use the carbon. Activated carbon is charcoal that’s been specially treated with heat and steam in the absence of oxygen so that particles cling to it like a pollution magnet; water that passes through it is as clean as mountain dew. Studies show that activated carbon filters effectively remove chlorine, industrial chemicals and some pesticides, as well as bad taste and odours. Of course, a carbon filter must be replaced every three weeks or twenty gallons of water (whichever comes first) to avoid recontamination.
The best activated carbon filters come in double canisters that are installed below the sink and then attached to a separate tap that bypasses the existing water line. They’re more expensive than the small filters that hook up to your tap. But if you have a water problem, they’re worth it.
Dr Rea says that some water-sensitive people do equally well on distilled water. Distilled water is heated until it turns to steam, and then re-condensed into water. Presumably, the chemicals and other debris are left behind. In truth, only ‘fractional’ water distillers actually get rid of all objectionable particles.
Water distillers have several drawbacks. They require a lot of water and they’re hard to keep clean. If you decide you want a water distiller anyway, look for one that’s easy to maintain.
Once your tap water has been filtered or distilled, store it in clean, glass containers in the refrigerator. Or you can buy bottled distilled water – just make sure it’s been ‘fractionally’ distilled.
If you are indeed allergic to something in your water, the most practical arrangement of all probably would be to purify your tap water and drink bottled water away from home.
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