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What is ‘Cooking in Healthy Water’ and how does it affect your diet? Cooking with healthy water means preparing vegetables, pulses and grains in water with a favourable mineral balance and low levels of contamination. Thanks to the purer composition of the water, flavours are better preserved and harmful residues from tap water are less likely to end up in your food.
In practice, you’ll notice this most with delicate vegetables such as organic cucumber or finely chopped leafy vegetables: they retain more colour and flavour than when cooked in ordinary tap water. After all, anyone who regularly eats organic fruit and vegetables doesn’t want chlorine or other additives in tap water to spoil the flavour of carefully grown produce. Filtered or ionised water prevents exactly that.

For most people, cooking means boiling in tap water. For the first time, it is no longer the most optimal choice. Take chlorine, for example. Water utilities treat surface water with chlorine to prevent bacterial contamination. However, one-third of all water is sourced from surface water. This surface water is then mixed with the pure spring water. Although the concentrations are low, certain products absorb a relatively large amount of water. The chlorine then becomes concentrated in the product you consume. In January 2024, the water utility PWN in North Holland reported that it was pumping three-quarters of its water from the IJsselmeer. The company is already struggling Filtering PFAS from drinking water.
Cooking organic vegetables in healthy water
When choosing organic vegetables, it is important to know, for example, which fruits and vegetables are sprayed the most and which the least. This choice is linked to the pesticides on vegetables.
First, the MOST DESPITE: From now on, buy this fruit preferably organic:
- Currants
- Strawberries
- Apples
- Blueberries
- Bananas
- Lemons
- Grapes
- Grapefruit
- Cherry
- Tangerines
- Nectarines
- Pears
- Peach
- Oranges
From now on, buy these vegetables preferably organic:
- Potatoes
- Cherry tomatoes
- Cucumbers
- Pepper
- Peppers
- Celery
- Save
- Spinach
- Carrots
Secondly, the MINEST BEST:Next, don't buy this fruit organic yet:
- Pineapple
- Avocado
- Kakifruit
- Kiwis
- Mango
- Melons or watermelons
- Papaya or passion fruit
- Plums
- Blackcurrants
Next, don't buy these vegetables organic yet
- Asparagus
- Aubergine
- Sweet potato or sweet potato
- Broccoli
- Peas
- Celeriac
- Mushrooms and mushrooms
- Red cabbage
- Onions
- Fennel
- Chicory
- White cabbage
- Sweet corn
- Sauerkraut
Cooking in healthy water?
We have actually been unaware of the great the impact of water in the kitchen for the past 50 years. We wash vegetables with tap water and then cook many products in the same tap water. Many people buy healthier versions like free-range eggs or organic pasta only to then cook these more expensive products in contaminated tap water again. Then later you read in the newspaper about the scandals at the companies that still use chemically banned products for organic eggs. However, there have been plenty of scandals in recent years. And new ones are bound to keep coming.

In summary, cooking in healthy water is important for products that absorb a lot of tap water during the cooking process. Think especially of boiling egg(s) .But also, for example potatoes, pasta cooking, mussels, spinach, cauliflower and rice cooking. Both basmati, unpolished and risotto rice grains absorb a lot of water. By using ultra fine, mineral-rich and also oxygen-rich water, you may prevent many health issues in the long run. Advice: always cook in healthy water! First, it doesn't take much effort to feel that it is more convenient to cook in terms of water quality. Next, by buying a Alpha Water Ioniser take matters into your own hands. Go to cooking in healthy water!
Frequently Asked Questions
What practical tips are there for cooking rice and pasta using filtered water?
Use filtered or ionised water instead of tap water straight from the tap. Chlorine in tap water can affect the flavour of rice and pasta. By removing chlorine and other residues, you’ll be able to taste the dish itself more clearly. Bring the water to the boil without a lid so that any volatile substances can escape. Ionised water has smaller molecular clusters, which means it is absorbed more quickly by the rice grains. This results in a more evenly cooked dish. A water ioniser delivers this water straight from the tap, so you don’t need to buy bottles.
How does having clean water in the kitchen help to make long-term savings on bottled water?
A water ioniser filters tap water and provides water that’s ready to use straight away in your kitchen. Research shows that households that switch to a home filtration system use, on average, hundreds fewer plastic bottles per year. That’s both sustainable and cheaper in the long run. You’ll recoup the cost of buying an ioniser by no longer having to buy bottled water. What’s more, you’ll reduce the CO₂ emissions caused by the transport and production of plastic bottles. For everyday water boiling in the kitchen, this is a fair and practical way to reduce your environmental impact without compromising on quality.
How does the flavour of recipes change if you use alkaline water for boiling?
Alkaline water has a higher pH value, usually between 8 and 9.5. This has a mild effect on the flavour of vegetables and pulses. Some bitter compounds do not dissolve as readily in alkaline water, which makes vegetables taste milder. Scientifically speaking, this effect is modest, but it is noticeable in delicate vegetables such as broccoli and peas. An expert in the field of water ionisers also points out that the reduced chlorine content alone makes a significant difference. You do not need to make any major adjustments to your recipes. The preparation remains the same.
How does boiling water with an ioniser work when you have an organic vegetable box delivered to your home?
Organic vegetables contain no pesticide residues, but preparing them with chlorinated tap water can still affect their flavour and nutrient content. If you prepare your organic vegetable box using filtered or ionised water, you’ll better preserve the purity of the produce. Chlorine can react with certain plant compounds and affect the flavour. An ioniser removes chlorine and reduces the water’s oxidation potential. As a result, the antioxidants in your organic vegetables are broken down less quickly during cooking. This is a logical addition to a conscious choice to eat organically.
Take the next step towards healthier cooking
Start by improving the quality of your cooking water: that’s the obvious first step for anyone who already chooses organic vegetables. Cleaner water enhances what you’re already doing well, as it really brings out the flavour, nutrients and safety of your meal.
→ Find out how to purify tap water to make it cleaner for cooking
→ Find out how to cook potatoes in clearer water
→ Water utilities treat surface water with chlorine
→ Filtering PFAS from drinking water
Cooking in healthy water It starts with a conscious choice: whether you opt for filtered or spring water, you’ll be introducing less chlorine, limescale and other undesirable substances into your dishes. Organic vegetables retain their flavour and nutrients better when prepared in pure water, as there are no chemical reactions between the food and water contaminants. Small changes in your kitchen — such as using a water filter or letting tap water stand for a while — can make a noticeable difference. Give your organic ingredients the attention they deserve and start by cooking in healthy water.