A water ionizer is a mechanical device that uses electrodes to change the molecular structure of water to make it cleaner and healthier.
Ionized water is antioxidant and mineral-rich and produces an array of health benefits ranging from more effective hydration to enhanced cognitive function.
Our product experts subjected scores of today’s most popular ionizers to rigorous examination and determined the following are the best water ionizers of 2021.
1. Tyent Alkaline H2 Hybrid Ionizer
We’re skeptical about any company or product touted as the gold standard. But in the case of Tyent, it turns out that the accolades the company has been enjoying are well-earned. The Alkaline H2 Hybrid Ionizer is easy to use, dependable, and produces pure, antioxidant-rich water.
What we like: The H2 Hybrid Ionizer provides a great deal of control over the pH level of your water. The LCD screen offers intuitive control, and the device cleans itself after every use. Toss in the company’s lifetime warranty, and you have our #1 water ionizer.
Flaws: It’s not the smallest unit on our list, so you will need plenty of space to set it up.
2. IntelGadgets IONtech IT-757 Water Ionizer
With a handsome, brushed stainless steel shell, easy to understand controls, and the ability to adjust pH levels from alkaline to acidic, the IntelGadgets IONtech IT-757 is affordable, beneficial tech for busy households.
What we like: Not every water ionizer gives you the ability to produce alkaline water or acidic ionized water. But the IONtech IT-757 does. And they make it super easy with their seven different presets. Complete with carbon filter to remove impurities.
Flaws: Might have to replace that filter more often than the marketing suggests.
3. Bawell Platinum Alkaline Water Ionizer
From the discrete minimalist design to the high flow rate and rock-solid construction, the Bawell Platinum Alkaline Water Ionizer is hard to beat. At only 11 pounds, it is one of the lightest countertop ionizers on the market as well.
What we like: We are partial to ionizers that provide a wide range of control over the final product. The Bawell Platinum is one of the best at that. With a high flow rate, easy setup, intuitive control, and a lifetime warranty, it’s worth the financial stretch.
Flaws: You will pay more for the Bawell Platinum, but it will not let you down.
4. HealthyWiser Alkaline Water Ionizer
The HealthyWiser Alkaline Water Ionizer looks great, runs quiet, pumps out a robust flow, and provides an insane amount of control over the pH level of your water. Whatever you need ionized water for, this machine will produce it for you.
What we like: The water filtration system is one of the best. You get precise control over alkaline or acidic content. The device cleans itself after every use. And if you don’t want to set it up on the countertop, you can do so under the counter just as easy.
Flaws: The control panel is too invested in looking good and not invested enough in being practical.
5. Aqua Ionizer Pro Deluxe 7.0
Some of the units we looked at so far are pretty large. Not the Aqua Ionizer Pro Deluxe 7. It fits comfortably on just about any countertop, where it purifies your water and then ionizes it to meet your specific needs.
What we like: The Aqua Ionizer Pro Deluxe provides seven pH settings ranging from highly alkaline to highly acidic. The platinum-coated electrodes should last for years. And if they don’t, you’re covered by the lifetime warranty.
Flaws: The stock model does not remove chlorine. And the control panel looks a bit cheap.
6. Alkaviva Authentic Melody II Water Ionizer
The engineers behind the Alkaviva Authentic Melody II put as much effort into making sure it purifies your water as they did into making sure you have fingertip control over pH levels. They did not skrimp on the aesthetic either, so you don’t have to hide it behind a plant.
What we like: This relatively compact, very attractive, well-built ionizer will make a fine addition to most kitchens. The water that emerges is noteworthy for its purity and is rich in antioxidants and beneficial minerals.
Flaws: It’s marketed as a ‘value’ ionizer. We don’t know if we’d go that far. But overall quality more than justifies its high price.
7. Life Water Ionizer Next Generation M11
Life makes a full line of water ionizers, but for our money, this is their best. The Next Generation M11 is easy to set up, easy to use, and provides a great deal of control over final pH levels. If pure, antioxidant-rich water is what you’re after, the M11 will provide it.
What we like: Despite its size, the M11 features a sleek, attractive profile. It’s powerful but energy-efficient, and the titanium plates are not going to rust out from under you. The resulting antioxidant-rich water is tasty and contains lots of calcium for strong bones.
Flaws: The unit is large and weighs more than 27 lbs, so be careful moving it around.
8. Cosan Alkaline Antioxidant Water Ionizer
Because there is no mechanical pump and no LCD screen, the Cosan Alkaline Antioxidant Water Ionizer does not require electricity. That alone will make it worth the price for many environmentally conscious individuals and families.
What we like: The Cosan Antioxidant Water Ionizer has the sleek, stylish appearance of a high-end coffee maker. Fortunately, it also removes more than 220 impurities from your tap water and provides alkaline water that’s rich in antioxidant benefits.
Flaws: Requires 4 AA batteries. So you need to be sure you always have some available.
9. IntelGadgets IT-580 Alkaline Water Ionizer
IntelGadgets makes a second appearance in our rankings with their outstanding IT-580. This is a versatile, lightweight (8 lbs), countertop ionizer that sets up fast and provides seven pH presets. It’s also one of the most affordable units on our list.
What we like: The IT-580 is less obtrusive than some other countertop units. But it doesn’t sacrifice functionality for that compact size. Resulting water is highly-pure, tasty, and ready to enhance your health or wash your vegetables.
Flaws: The design, while not a deal-breaker, is not far from being that.
10. iRayer Alkaline Water Ionizer
The iRayer Alkaline Water Ionizer is handsome, affordable, dependable, and (relatively) compact. It gets everything right from purifying the tap water to providing a screen big enough to read from a distance. Hooks up easily to any kitchen or bathroom tap.
What we like: One of the easiest water ionizers to use. It also has one of the largest LCD screens, which we really appreciated. A great looking device as well that will not detract from your kitchen decor.
Flaws: The light weight is the result of a plastic body.
Who Needs a Water Ionizer?
The human body is 70% water, and that water needs constant replenishment. Skip drinking water for even one day, and you are bound to pay dearly. Most tap water is loaded with chemicals and often has a funky taste to it. Bottled water, on the other hand, tastes better, but every year billions of plastic bottles wind up in landfills and the ocean.
A water ionizer can turn your iffy tap water into a tasty, mineral-rich, toxin-free beverage that will provide more effective hydration, while at the same time delivering a slew of health benefits, which we’ll get into shortly. Ionized water is brimming with antioxidants that fight oxidative stress. It is also loaded with beneficial minerals, including magnesium and calcium.
So who needs a water ionizer? Anyone who wants to enjoy better-tasting water, more complete hydration, and better overall health in both the short and long-term.
How We Ranked
From a scientific standpoint, water ionizers are not terribly complicated. First, tap water is passed through a filter to remove impurities (some ionizers also use UV light to kill bacteria). Then the purified water is passed over an electrode that either adds electrons and produces alkaline water, or removes electrons and produces acidic water. Not all ionizers do both.
The science does not change from machine to machine, so it is not difficult to determine if an ionizer is working. All that’s needed is to test the pH content of the output water. Once we winnowed down the many dozens of ionizers to those couple of dozen that do the most reliable job ionizing the water, other considerations reared their head.
First, we insisted that any ionizer for home use be easy to install. A person should not have to hire someone to do the job for them. All the water ionizers that made our list passed the installation test with flying colors. Any countertop water ionizer must also be easy to use with a very agreeable learning curve.
Next, we looked at energy usage, because most human beings are aware by now of the importance of energy conservation. So any device that runs on electricity should incorporate the latest energy-saving technology.
Once we had pared our list down using the above criteria, we considered aesthetics. Looks are important because, after all, this is going to be sitting on your kitchen or bathroom counter for all to see.
Finally, we weighed price and warranty. The best water ionizers are not cheap. So they needed to pass muster regarding all of the above criteria, and they needed to offer comprehensive long-term warranties. For the most expensive ionizers, we wanted to see a warranty of at least five years.
A water ionizer can help restore your body’s pH balance. Numerous research studies point to the importance of the body’s pH balance (1). When the pH balance in our cells becomes unbalanced, it can lead to fatigue, infections, and compromised physical performance. It can also make a person susceptible to diabetes. A water ionizer can help restore your body’s proper pH balance and keep it in line, so you enjoy better long term health.
A water ionizer helps you cook healthier food. Most water ionizers give you a choice of increasing or decreasing the pH level of the water. By reducing the pH level, you produce what’s called ‘acidic ionized water’. And while that sounds somewhat uninviting, that type of water is actually good for washing fruits and vegetables. Why? Because the increased acidity kills off potentially harmful microbes that often attach themselves to fresh produce.
A water ionizer produces alkaline water, which has cardiovascular benefits. At the other end of the pH spectrum from acidic ionized water is alkaline water. Alkaline water is produced by increasing the pH level of water. Alkaline water has numerous potential health benefits, many of them linked to its antioxidant properties. Antioxidants (2) counteract the effects of oxidative stress, a major cause of cardiovascular disease (3).
A water ionizer may help prevent some types of cancer. This is one of the most commonly cited benefits of alkaline water. The claim stems from the fact that oxidative stress is linked to many types of cancer (4), and the best way to fight oxidative stress is with antioxidants. As we mentioned above, alkaline water is a potent antioxidant. Therefore, it may have a role to play in cancer prevention.
A water ionizer may help with acid reflux. Acid reflux (5) is a combination of excessive amounts of acid in the digestive tract and the inappropriate relaxation of the sphincter muscle separating the stomach from the esophagus. As a result, acid leaks into the esophagus, causing heartburn and worse. Because of its high pH levels, alkaline water may be able to neutralize some of that excess stomach acid and fend off acid reflux.
Ionized water may help improve your mood. Dehydration can have a negative effect on mood (6). But because ionized water is more readily absorbed by cells, it provides a higher level of hydration, which should neutralize any dehydration-related moodiness. And second, because there is a link between oxidative stress and mood disorders (7). And ionized water can reduce oxidative stress.
Ionized water is chock full of magnesium. The ionization process results in water that is rich in minerals, including magnesium. Magnesium may be the most overlooked mineral when it comes to overall health. It is the most abundant mineral in the body and plays a vital role in more than 300 metabolic processes (8). If you feel better after drinking ionized water, it is a safe bet the magnesium you’re getting has something to do with it.
A water ionizer enables more effective workouts. As we touched on above, the pH level in our cells is crucial to overall physical performance. That has serious implications for those who engage in rigorous workouts. Unbalanced pH levels mean they may never be able to see what their body is actually capable of. Alkaline water from a water ionizer can restore proper pH balance and enable truly effective workouts (9).
A water ionizer enhances the hydrating power of your water. It might seem strange to think that a simple machine can increase the ability of water to provide hydration, but it’s true. The process of ionizing water changes its molecular structure, making it much easier for cells to absorb. This, in turn, leads to much more effective hydration without having to increase the amount of water consumed.
Ionized water is good for your brain. Recently, scientists have been looking into the effects of antioxidants on cognitive function. The good news is that a lot of their research has been producing positive results (10). Alkaline ionized water is rich in antioxidants, making it a smart choice for older folks (or anyone for that matter) looking for ways to stay mentally sharp.
Ionized water is good for your skin. That’s because, as we have just seen, alkaline water produces more effective hydration. Properly hydrated skin is healthier-looking, more supple, and less vulnerable to oxidative stress. Properly hydrated skin is also less susceptible to wrinkles and common skin conditions like dermatitis, and eczema. Alkaline water also restores the proper pH balance of the skin.
A water ionizer may help you lose weight. While this claim is still somewhat controversial, there is limited clinical evidence to support the notion that ionized water can help a severely overweight person lose weight without having to take any other extraordinary steps (11). Whether this benefit extends to individuals who just want to lose a few pounds of holiday weight remains to be seen.
A water ionizer may help you live longer. A study published in 2016 suggests that alkaline water can slow the aging process (12). The study was conducted on 150 mice under strict controls. Some were given only alkaline water to drink. Others were given tap water. After three years, the mice given alkaline water did not exhibit the same degree of aging as the mice given tap water.
Ionized water is good for your hair. Many commercial shampoos have a high pH level. This can leave your hair susceptible to frizziness and breakage (13). If your water ionizer allows you to adjust pH levels, run a gallon or so of low pH water, and use it to rinse your hair after shampooing. This should restore the natural pH balance of your hair and improve its look and feel.
A water ionizer can help you reclaim your active lifestyle. With economies around the world ramping back up, people are resuming their busy lives. Months of inactivity, however, may make it difficult for many of them to step back into their busy lifestyles. A water ionizer can help. Alkaline ionized water is known to enhance physical performance for athletes and ordinary folks alike, regardless of age.
A water ionizer may purge mercury from your system. Over time, many toxins accumulate in our body. These include toxins derived from the food we eat, and those we absorb from the environment, including mercury. A 2006 clinical study (14) determined alkaline water can reduce mercury levels. With mercury exposure considered a significant health problem by the WHO (15), a water ionizer may be just what the doctor ordered.
Ionized water may improve bone health. Ionized water is rich in potassium, magnesium, and calcium. The latter is particularly important for maintaining bone health as we age. Age-related bone loss, or osteoporosis (16), is especially prevalent among women and is a major cause of bone fractures later in life (17). By providing necessary calcium, ionized water can help prevent bone loss and ward off devastating fractures.
Ionized water can thin the blood. Scientific studies have confirmed that high pH ionized water is capable of reducing blood viscosity by as much as 6% (18). This has numerous potential benefits, including reducing pressure on the heart, increasing blood flow, and increasing oxygen delivery to muscles and the brain. The result should be higher energy levels, greater stamina, and greater mental alertness.
Ionized water tastes great. Many people tasting ionized water for the first time remark on the taste. Alkaline ionized water has a smoother taste than common tap water, or bottled water for that matter. Researchers believe this is due to the rearranging of molecules in the water after the ionization process. Those reorganized molecules are also smaller than standard water molecules and act to rehydrate more effectively.
Ionized water may help reduce acne. A 2005 study published by the National Institutes of Health determined that oxidative stress contributes to the development of acne (19). We discussed earlier that the antioxidant properties of ionized water make it an important tool in the fight against oxidative stress. That also means it is a potentially valuable tool in the battle against acne.
Ionized water is great for cleaning around the kitchen and bathroom. Not all water ionizers enable you to adjust the pH balance of water. But many do. One of the benefits of these machines is that you can produce ‘acidic ionized water’. This is water with a very low pH count. This water has potent antimicrobial properties, making it a smart choice for cleaning around the kitchen and bathroom.
A water ionizer can help you look and feel better. Because of its impressive antioxidant properties, ionized water helps neutralize the activity of free radicals. Free radicals are responsible for cell death throughout the body. They can make a person appear to age prematurely, while at the same time degrading the performance of their vital organs, including the skin. A water ionizer can fight free radicals and help you look and feel better.
Q: What is ionized water?
A: Ionized water is produced by adding or removing electrons from water molecules. Adding electrons to water molecules produces alkaline ionized water. Removing electrons produces acidic ionized water. Many water ionizers allow you to adjust the pH levels of your water. When you do so, you are either adding (alkaline) or subtracting (acidic) electrons from the water molecules. The different types of ionized water serve different purposes.
Q: How does a water ionizer produce ionized water?
A: Adding or removing electrons seems like a job for a supercollider. But it is not as difficult as you may think. Inside the ionizer, water is run over electrodes that are either positively or negatively charged. This produces either alkaline water or acidic water, respectively. The water then emerges from the machine, and you are free to use it for whatever purpose you have in mind.
Q: Can ionized water enhance physical performance?
A: During exercise the use of muscle glycogen increases substantially (20). However, this has a negative effect on the pH balance of muscle tissue. Expending glycogen produces pyruvic and lactic acids and CO2, all of which erode pH levels in muscles, reduce stamina, and compromise a person’s ability to achieve optimal performance. Alkaline water produced by a water ionizer can
Q: What should I expect when I start drinking ionized water?
A: Your experience will depend in large part on your lifestyle. If you are an active person, you are likely to have greater energy and perhaps think a bit more clearly. If you are athletically inclined, you may experience more effective workouts, more stamina, and less muscle soreness. However, if you are mostly sedentary, the benefits may be confined to better hydration and a reduced chance of developing chronic conditions like heart disease.
Q: Why do some water ionizers have a UV light?
A: Some water ionizers have a UV light inside. It’s not there to provide some psychedelic lighting effect. It’s there to help remove bacteria from the water (21). Ultraviolet light can kill many types of bacteria by penetrating them and actually breaking down their DNA. Scientists have long understood the benefits of UV light for purifying water. Recently, some ionizer manufacturers have picked up on this and incorporated it into their designs.
Q: Is there such a thing as drinking too much ionized water?
A: There have been no health studies examining the possible effects of drinking too much ionized water. At the same time, however, there are no credible reports of people suffering ill effects from drinking ionized water on a regular basis. Some health professionals worry that too much high pH alkaline water may have a negative impact on necessary stomach acids. But there is no proof that concern is warranted.
Q: Is it difficult to install a water ionizer?
A: No, it is not difficult to install a water ionizer. At least the commercial countertop water ionizers we are talking about in this product guide. Most can be installed in just a few minutes with no special tools or training of any kind required. One thing older folks should be aware of though, is that some of these machines can get pretty heavy. Like, between 20-30 pounds heavy. So you will want to be careful when lifting and moving them.
Q: Does ionized water stay ionized?
A: Most things want to return to their natural state and water is no different. Ionizing water will provide a wealth of benefits as we have seen, but the effects of ionization on water molecules is not permanent. The antioxidant benefits will usually dissipate in about a day. So drink that water alkaline shortly after making it. Beyond that, the higher pH levels of the ionized water will begin to dissipate after about a week.
Q: Can I use a water ionizer with bottled water?
A: In theory, a water ionizer will work with any type of water. The problem is getting the water into the machine. Most ionizers are designed to be hooked up directly to the faucet in your kitchen. There are, however, some portable units on the market that produce small volumes of ionized water. These are top-loading units you can pour the water directly into. Some are plug-in models. Others are battery operated.
Q: What is the downside of drinking ionized water?
A: There is no known downside to drinking alkaline ionized water. That is the ionized water with elevated pH levels. As we mentioned earlier, some water ionizers enable you to produce both alkaline ionized water and acidic alkaline water. If you have one of those machines, it is important you remember that the acidic ionized water is not intended for drinking. Acidic water promotes oxidative stress (22), and there is no good spin you can put on that.
Q: Is ionized water used in commercial applications?
A: Yes, ionized was is and has been used commercially for decades. Ionized water is used in the dairy industry. It is fed to cows and helps keep them properly hydrated and improve their overall health. Acidic ionized water is also used to keep pests off of crops and ensure veggies at your favorite salad bar stay safe and delicious.
Q: Do I need any special hardware to hook up a water ionizer?
A: In most cases, you will not need any special hardware to hook up a water ionizer. Most come with all the components you will need to attach them directly to your faucet. It is possible that, in some cases, you may need a screwdriver or a small adjustable wrench. But such cases are the exception. Most, can be installed by anyone able to follow simple directions in just about 10 minutes, sometimes less.
Q: If ionized water is so healthy, why don’t cities provide it?
A: There are some sources of naturally occurring alkaline water in the world. But they are few and far between and do not produce nearly enough water to handle the needs of large cities. The cost of setting up ionization plants for a city’s municipal water supply would also be prohibitive. The good news is that anyone can turn their municipal tap water into clean, antioxidant-rich ionized water with one of the above ionizers.
Q: Can anyone drink ionized water?
A: There is nothing preventing anyone, including children and the elderly, from drinking beneficial ionized water. You can even feed it to your pets and let them enjoy the benefits. That said, if you are currently being treated for GERD (23), you may want to consult your doctor before you start drinking alkaline ionized water. That’s because the water may change the acidity of your stomach environment, and that may impact any medications you are taking.
Q: Why should I buy a water ionizer?
A: You should buy a water ionizer because you want to enjoy a higher degree of overall health. You should buy a water ionizer because you want to take advantage of the antioxidant benefits it has to offer, including the ability to help fend off cardiovascular disease, cognitive decline (24), and more. You should buy a water ionizer that allows you to adjust pH levels so you can have acidic ionized water to wash vegetables with.
Q: Will ionized water interfere with medications?
A: There is no clinical evidence to suggest that ionized water will interfere with any prescription medications. The lone exception might be medications to control GERD (acid reflux). Because alkaline water can affect the stomach’s pH balance, you should discuss the situation with your doctor before starting to drink ionized water on a regular basis.
Ionized water provides numerous antioxidant benefits, can help restore your body’s pH level, and enables you to enjoy more effective hydration.
Ionized water has virtually no side effects, will not interact poorly with medications, and does not contain harmful chemicals.
The best water ionizers are easy to set up, dependable, energy-efficient, and will serve you well for years to come.
For cpoe.org’s #1 recommended water ionizer, click here.