By Becky Bell
In 2015, Americans alone spent more than $11 billion on teeth whitening, including more than $1.4 billion on at-home whitening products (1).
There are plenty of products to choose from when it comes to whitening your teeth.
If you want whiter teeth, but also want to avoid the chemicals, then this article lists many options that are both natural and safe.iStock
However, most whitening products use chemicals to bleach your teeth, which concerns many people.
If you want whiter teeth, but also want to avoid the chemicals, then this article lists many options that are both natural and safe.
What Causes Teeth to Look Yellow?
There are multiple factors that cause teeth to become dull and lose their bright, white sparkle.
Certain foods can stain your enamel, which is the outermost layer of your teeth. Additionally, plaque build-up on your teeth can cause them to look yellow.
This type of discoloration can usually be treated with regular cleaning and whitening remedies.
However, sometimes teeth look yellow because the hard enamel has eroded away, revealing the dentin underneath. Dentin is a naturally yellow, bony tissue that lies underneath the enamel.
Here are 7 simple ways you can naturally whiten your teeth.
1. Try Oil Pulling
Oil pulling is a traditional Indian folk remedy meant to improve oral hygiene and remove toxins from the body.
The practice involves swishing oil around in your mouth to remove bacteria, which can turn into plaque and cause your teeth to look yellow (2).
Traditionally, Indians used sunflower or sesame oil for oil pulling, but any oil will work.
Streptococcus mutans is one of the primary types of bacteria in the mouth that cause plaque and gingivitis. One study found that daily swishing with sesame oil significantly reduced streptococcus mutans in saliva in as little as one week (8).
Unfortunately, there are no scientific studies to prove that oil pulling whitens your teeth. However, it's a safe practice and definitely worth a try. Many people claim their teeth are whiter and brighter after regular oil pulling.
To oil pull, put 1 tablespoon of coconut oil in your mouth and push and pull the oil through your teeth. Coconut oil is solid at room temperature, so you may need to wait a few seconds for it to melt. Continue the oil pulling for a full 15–20 minutes.
Be sure to spit the coconut oil into a toilet or trash can, as it could return to solid form once in your drain pipes and cause a clog.
Unlike many other tooth whitening methods, coconut oil pulling does not expose your teeth to acid or other ingredients that erode the enamel. This means it is safe to do daily.
Bottom Line: Coconut oil pulling involves swishing oil in your mouth for 15–20 minutes to remove bacteria. Practicing this daily can reduce plaque and may brighten your teeth.
2. Brush With Baking Soda
Baking soda has natural whitening properties, which is why it's a popular ingredient in commercial toothpaste.
It's a mild abrasive that can help scrub away surface stains on teeth.
Additionally, baking soda creates an alkaline environment in your mouth, which prevents bacteria from growing (9).
This is not a remedy that will whiten your teeth overnight, but you should notice a difference in the appearance of your teeth over time.
Science has not yet proven that brushing with plain baking soda will whiten your teeth, but several studies show that toothpaste with baking soda has a significant whitening effect.
One study found that toothpastes containing baking soda were significantly more effective at removing yellow stains from teeth than standard toothpastes without baking soda. The higher the concentration of baking soda, the greater the effect (10).
Furthermore, a review of five studies found that toothpastes containing baking soda removed plaque from teeth more effectively than non-baking soda toothpastes (11).
To use this remedy, mix 1 teaspoon of baking soda with 2 teaspoons of water and brush your teeth with the paste. You can do this a few times per week.
Bottom Line: Brushing with a paste made with baking soda and water can reduce bacteria in your mouth and buff away surface stains.
3. Use Hydrogen Peroxide
In fact, people have been using hydrogen peroxide for years to disinfect wounds because of its ability to kill bacteria.
Many commercial whitening products contain hydrogen peroxide, although at a much higher concentration than you will use.
Unfortunately, there aren't any studies to show the effects of rinsing or brushing with hydrogen peroxide alone, but several studies have analyzed commercial toothpastes containing peroxide.
One study found that a toothpaste containing baking soda and 1 percent hydrogen peroxide led to significantly whiter teeth (13).
Another study found that brushing with a commercial toothpaste containing baking soda and peroxide twice per day led to 62 percent whiter teeth in six weeks (14).
However, there are some questions regarding the safety of hydrogen peroxide.
While heavily diluted concentrations appear safe, strong concentrations or overuse can cause gum irritation and tooth sensitivity. There's also concern that high doses may cause cancer, but this has not been proven (15, 16, 17, 18, 19).
One way to use hydrogen peroxide is as a mouthwash before you brush your teeth. Make sure you are using a 1.5 percent or 3 percent solution to avoid side effects.
The most common concentration of hydrogen peroxide at the drugstore is a 3 percent solution. You can easily dilute this concentration to 1.5 percent by mixing equal parts peroxide and water.
Another way to use hydrogen peroxide is by mixing it with baking soda to make a toothpaste. Combine 2 teaspoons of hydrogen peroxide with 1 teaspoon of baking soda and gently brush your teeth with the mixture.
Limit the use of this homemade paste to a few times per week, as overuse can erode your tooth enamel.
Bottom Line: Hydrogen peroxide is a natural bleaching agent and can kill bacteria in your mouth. You can use it as a mouthwash or mix it with baking soda to form a whitening toothpaste.
4. Use Apple Cider Vinegar
Apple cider vinegar has been used for centuries as a disinfectant and natural cleaning product.
Acetic acid, which is the main active ingredient in apple cider vinegar, effectively kills bacteria. The antibacterial property of vinegar is what makes it useful for cleaning your mouth and whitening your teeth (20, 21, 22, 23).
One study performed on cow teeth found that apple cider vinegar does have a bleaching effect on teeth. However, they also found that vinegar may soften the teeth (24).
The acetic acid in vinegar has the potential to erode the enamel on your teeth. For this reason, you should not use apple cider vinegar every day. You should also limit the amount of time that apple cider vinegar is in contact with your teeth (25).
To use it as a mouthwash, dilute it with water and swish it around in your mouth for several minutes. Make sure to rinse your mouth with plain water afterwards.
Bottom Line: Apple cider vinegar has antibacterial properties that may help whiten your teeth. However, overuse of vinegar can also erode the enamel on your teeth, so limit its use to a few times per week.
5. Use Fruits and Vegetables
A diet high in fruits and vegetables may be good for both your body and your teeth.
While they're no substitute for brushing your teeth, crunchy, raw fruits and vegetables can help rub plaque away as you chew.
In particular, strawberries and pineapple are two fruits that have been claimed to help whiten your teeth.
Whitening your teeth with a strawberry and baking soda mixture is a natural remedy that has been made popular by celebrities.
Proponents of this method claim that the malic acid found in strawberries will remove discoloration on your teeth, while the baking soda will buff away stains.
However, this remedy has not been completely backed up by science.
While strawberries may help exfoliate your teeth and make them appear whiter, they are unlikely to penetrate the stains on your teeth.
A recent study found that a strawberry and baking soda mixture produced very little color change in teeth, compared to commercial whitening products (26).
If you decide to give this method a try, limit its use to a few times per week.
To use this remedy, smash up a fresh strawberry, combine it with baking soda and brush the mixture on your teeth.
Some claim that pineapple can whiten teeth.
However, there is no evidence that eating pineapples produces the same effect.
Bottom Line: Certain fruits may have properties that help whiten teeth. Regularly consume raw fruits and vegetables to help rub off plaque and keep your teeth looking bright.
6. Prevent Tooth Stains Before They Happen
Your teeth naturally yellow as you age, but there are some things you can do to prevent stains on your teeth.
Limit Staining Foods and Beverages
That doesn't mean you have to completely avoid them, but you should limit the amount of time these substances are in contact with your teeth.
If possible, drink beverages known to stain teeth out of a straw to prevent direct contact with your teeth.
Moreover, brush your teeth soon after consuming one of these foods or beverages to limit their effects on the color of your teeth.
Additionally, avoid smoking and chewing tobacco, both of which can cause tooth discoloration.
Limit Sugar in Your Diet
If you want whiter teeth, cut back on your sugar intake.
When you do consume a sugary food, brush your teeth soon after you eat.
Get Plenty of Calcium in Your Diet
Some tooth discoloration is caused by enamel eroding away and exposing the dentin underneath, which is yellow in color. Therefore, anything you do to strengthen the enamel of your teeth will help keep your teeth pearly white.
Bottom Line: A healthy diet with enough calcium can help prevent your teeth from becoming yellow. Brushing your teeth soon after you eat can also help prevent stains.
7. Don't Underestimate the Value of Brushing and Flossing
While some tooth discoloration comes naturally with age, a large portion is a result of plaque build-up.
Regular brushing and flossing can help your teeth stay white by reducing bacteria in your mouth and preventing plaque build-up.
Toothpaste gently rubs out stains on your teeth and flossing removes bacteria that lead to plaque.
Regular dental cleanings can also help your teeth stay clean and white.
Bottom Line: Daily brushing and flossing, along with regular cleanings at the dentist's office, prevent the build-up of yellowing plaque on your teeth.
Other Methods That Are Not Proven
There are a few other natural teeth whitening methods, but there is no scientific evidence to prove that they are effective or safe.
Here are some of the unproven methods:
- Activated charcoal: Brushing with powdered charcoal supposedly pulls toxins from the mouth and removes stains from teeth.
- Kaolin clay: Proponents of this method claim that brushing with clay helps remove stains from teeth.
- Fruit peels: Rubbing orange, lemon or banana peels on your teeth is claimed to make them whiter.
Advocates of these methods claim they make teeth significantly whiter, but no studies have evaluated their effectiveness. This also means that they have not been tested for side effects when used on teeth.
Bottom Line: Activated charcoal, kaolin clay and fruit peels may help whiten your teeth, but no studies have evaluated the safety or effectiveness of these methods.
Take Home Message
There are several natural methods to help whiten your teeth. Most of these remedies work by gently removing surface stains on your teeth.
However, most dentists offer whitening treatments that are much stronger than these natural remedies. They involve bleaching the teeth, which may be more effective for severe tooth discoloration.
Reposted with permission from our media associate Authority Nutrition.
By Kayla Wiles
What if paint could cool off a building enough to not need air conditioning?
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="835862ffe8b025c2f0ae633c999ecb08"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/caFzYvYAUo4?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p>The paint would not only send heat away from a surface, but also away from Earth into deep space where heat travels indefinitely at the speed of light. This way, heat doesn't get trapped within the atmosphere and contribute to global warming. A video about this project is available on <a href="https://www.youtube.com/watch?v=caFzYvYAUo4&feature=youtu.be" target="_blank">YouTube</a>.</p><p>"We're not moving heat from the surface to the atmosphere. We're just dumping it all out into the universe, which is an infinite heat sink," said Xiangyu Li, a postdoctoral researcher at the Massachusetts Institute of Technology who worked on this project as a Ph.D. student in Ruan's lab.</p><p>Earth's surface would actually get cooler with this technology if the paint were applied to a variety of surfaces including roads, rooftops and cars all over the world, the researchers said.</p>
An infrared camera image shows that white radiative cooling paint developed by Purdue University researchers (left, purple) can stay cooler in direct sunlight compared with commercial white paint. Purdue University image / Joseph Peoples<p>In a paper published Wednesday (Oct. 21) in the journal <a href="https://doi.org/10.1016/j.xcrp.2020.100221" target="_blank">Cell Reports Physical Science</a>, the researchers show that compared with commercial white paint, the paint that they developed can maintain a lower temperature under direct sunlight and reflect more ultraviolet rays.</p><p>Their proof is infrared camera images taken of the two paints in rooftop experiments.</p><p>"An infrared camera gives you a temperature reading just like a thermometer would to judge if someone has a fever. These readings confirmed that our paint has a lower temperature than both its surroundings and the commercial counterpart," Ruan said.</p><p>Commercial "heat rejecting paints" currently on the market reflect only 80%-90% of sunlight and cannot achieve temperatures below their surroundings. The white paint that Purdue researchers created reflects 95.5% sunlight and efficiently radiates infrared heat. </p>
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