As we age, the outer layer of tooth enamel wears away. The underlying layer, called dentin, is yellower. That's why it's important to try to avoid staining teeth in the first place, especially after whitening. If you take care with foods and drinks that discolor teeth, the results of whitening may last up to one year. Whitening teeth too often could make them look translucent and blue, so you'll want to maintain your new smile.
We are told that conventional teeth whitening (bleaching) is safe from experts.  Yet others warn of the risks of conventional teeth whitening.  Much of the confusion stems from the fact that the ‘facts’ around teeth whitening have been blurred intentionally.  Then we hear how Julia Roberts only uses baking soda to keep her smile bright.  But is baking soda even a safe option?
Thank you for stopping by to offer your input to this conversation. Thank goodness we all don’t want the same thing, right? I suppose I’m much more cautious and dubious of the dental profession than you express here. Given that the dental profession still sings the praises of fluoride and mercury amalgam fillings despite tremendous research proving their dangers, I’m frankly not sure the reasoning you pose here is sound (from my humble, yet very opinionated opinion).
It's the bleaching agent found in most home whitening kits. It actually changes a tooth's color. One study found that painting an over-the-counter gel with 6% hydrogen peroxide on teeth made a noticeable difference after 2 weeks. The inexpensive bottles of liquid you can buy in a drugstore usually have a lower percentage. And the American Dental Association says swishing will probably irritate your gums before it whitens your teeth.

Great questions! Oil pulling is an ancient cleansing and detoxifying technique from Ayurvedic medicine, the traditional medicine of India. The process is simply to vigorously swish (also known as “pull”) unrefined oils (usually coconut or sesame oil) throughout the mouth for several minutes. Similar to what oil does in a car engine, oil pulling gathers all sorts of debris like bacteria, fungi, and viruses (aka bad bugs) into the oil to be spit out. Some people also like to do oil pulling to help remove stains so that their teeth appear whiter.
Get enough Vitamin D. Vitamin D helps your body absorb and use calcium. It is also beneficial for boosting your immune system to fight against bacteria, viruses and free radicals that can erode teeth. Getting enough vitamin D can help you maintain a healthy smile, strengthen bones and even help prevent various types of diseases and cancers. Here are some ways to make sure you get enough vitamin D:
First of all, one of the reasons why you are looking at how to whiten teeth naturally fast at home is probably because you already know that professional teeth whitening is nor cheap, neither is healthy. Professional teeth whitening can leave your teeth very sensitive and weak. So, since it is possible, you should try and whiten your teeth naturally at home.
Over-the-counter tray and gels have been around the longest. Known as a “boil and bite” system, they require you to heat a tray, fill it with gel, and place the formed tray in your mouth. This whitening method takes weeks to deliver results, and 80 percent of users report sensitivity due to the breakdown of the carbamide peroxide gel. While the tray helps prevent oxygen from escaping, there are other options that can lead to efficacious whitening without the soft tissue irritation and pain. 
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I recently saw some beautiful wedding pictures where the bride had bright white teeth. I asked if she had them professionally whitened and the mother of the bride said that she used coconut oil. I was thrilled because i had purchased some coconut oil from the Organic Marketplace in our town and plan to use it for better dental care and oral health.

Some people still prefer the age-old home remedy of baking soda and a toothbrush to gently whiten teeth at home. Also, some foods such as celery, apples, pears, and carrots trigger lots of saliva, which helps wash away food debris on your teeth. Chewing sugarless gum is a tooth-cleansing action and also triggers saliva. A bonus from all that saliva: It neutralizes the acid that causes tooth decay. With teeth, more saliva is better all around.
Can it be true? Coconut oil to clean your teeth? Just when you thought you heard it all when it comes to coconut oil, along comes the news that coconut oil pulling can serve as a natural teeth whitener. Some people attest to their teeth becoming whiter and overall healthier by applying coconut oil to their teeth after they brush, and most people praise the results of oil pulling.
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