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.
I grew up using Crest with fluoride, brushing within 5 minutes after finishing a meal… (I’ve only ever had three cavities, one of which the dentist gave me when he jabbed his pick into a molar.) After about 30-35 years my teeth began to get really sensitive, so I switched to the various sensitive toothpastes, again with fluoride. About two years ago (I’m almost 59 now), I began reading about fluoride’s effects on teeth and the body, including how FLUORIDE STAINS TEETH YELLOW/BROWN. So I switched to Tom’s no-fluoride toothpaste. I don’t know if it’s just wishful thinking, or an actuality, but I believe my teeth are getting whiter – and I still drink a quart of hot regular black tea (4 teabags’ worth in a Mason jar) every morning! There’s natural fluoride in the tea, but cutting out the fluoride toothpaste has made a world of difference AND my teeth aren’t sensitive anymore, either! I think the sensitivity was also brought on by all that fluoride! Any time I tried to switch off the sensitive pastes to a regular toothpaste, or even between brands of the sensitive types, the inner lining of my mouth would slough off in sheets (as in peeling skin after a bad sunburn), my teeth would just throb, and I’d go back to the sensitive paste. When I went to the Tom’s, my mouth lining was fine, my teeth never hurt, and they seem to be getting whiter! HOORAY!!!
A home tooth-whitening kit contains carbamide peroxide, a bleach that can remove both deep and surface stains and actually changes your natural tooth color. If you have coffee-stained teeth, a tooth-bleaching kit can help. With some kits, you apply a peroxide-based gel (with a small brush) to the surface of your teeth. In other kits, the gel is in a tray that molds to the teeth. The tray must be worn daily (for 30 to 45 minutes) for a week or more.
Make a paste of baking soda and lemon juice. It will likely fizz and foam a bit. Wait for it to settle down and use this solution to brush your teeth. Rinse well. You don’t need to follow with your regular toothpaste, but you can if you wish. Lemon juice contains citric acid, so it can damage your teeth if used too often. Only do this once a week for best results.
Whitening devices appeared on store shelves approximately two years ago, bringing elements of professional lightening to the user at home. Heat works to accelerate the breakdown of hydrogen peroxide, creating more whitening oxygens. High-intensity lights are required to accelerate the reaction rate of the hydrogen peroxide, meaning users and those in the immediate vicinity must wear protective eyewear. By combining the professional elements of light and heat in a closed system mouthpiece, along with a non-migrating gel, the device calls upon the professional whitening experience. If you are short on time, this device may whiten your teeth in two days. 
You can safely use fluoridated water to prepare infant formula. However, prolonged exposure and intake of fluoride during infancy may cause mild fluorosis, which actually weakens enamel. Fluorosis only occurs with baby teeth but it can also affect the development of permanent teeth and lead to white spots on teeth, so consider ways to minimize your baby’s exposure to fluorosis until they begin to grow permanent teeth such as using distilled, demineralized or purified water and giving your child calcium-rich foods and beverages. Since fluoride isn’t an essential mineral for the body, you do not need to worry about any deficiency.

Once I became pregnant with our first child, I was careful to avoid all chemicals, including those normally used to whiten teeth. I wanted to find natural ways to whiten my teeth that not only worked well, but were also safe. Since chemicals can easily absorb through the sensitive skin in the mouth, I wanted to only use options that were safe enough to eat.
Activated charcoal, an absorbing product used to trap toxins inside the body, may help whiten your teeth by absorbing plaque and microscopic tidbits that cause staining. To whiten your teeth naturally with charcoal, wet a toothbrush and dip into powdered activated charcoal. Brush teeth as normal, paying special attention to areas showing the most staining. Sip a bit of water, swish through mouth thoroughly and spit. Rinse well, until spit is clear. For best results, brush your teeth with activated charcoal two to three times per week, but avoid using it if you have crowns, caps or porcelain veneers.

Español: blanquear los dientes de forma natural, Português: Clarear os Dentes Naturalmente, Русский: отбелить зубы натуральными средствами, Italiano: Sbiancare i Denti in Modo Naturale, Français: avoir des dents plus blanches naturellement, Deutsch: Zähne natürlich aufhellen, 中文: 自然美白牙齿, Čeština: Jak přirozeně vybělit zuby, Bahasa Indonesia: Memutihkan Gigi Secara Alami, 日本語: 自然に歯を白くする, العربية: تبييض الأسنان بطرق طبيعية
Baking soda or sodium bicarbonate is the most common natural teeth whitener. It is an alkaline substance that’s why it helps balance the oral ph level, which in turn promotes healthy teeth and gums. However, there are also disadvantages to using baking soda as teeth whitener. We should be aware of that if we do it repeatedly, it can weaken our teeth’s enamel over time.
I simply dip my toothbrush into some powdered charcoal that I keep in a small jar on my counter and brush as normal. Another way that will produce results more quickly is to mix a teaspoon of charcoal powder into some water and swish with it for a few minutes. Then, spit the water and leave the remaining charcoal in the mouth for a few minutes so that it has time to bind to stains.
And I have a wish. Maybe it is possible, that you write about energy?How to get more, what you can do to keep it high. Although I eat clean and healthy my energy is very low and nothing really seems to help. I try to get out every day, but can’t make ist . I have ‘only’ one child and it is hard for me to get through the days and wonder how you manage everything so well. Maybe you have some ideas. Would be very much appreciated. Thx.

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.
In today’s article on how to naturally whiten your teeth without destroying your enamel, we will detail several strategies that we have researched and deem to be safe for long-term use.  We will also provide some ‘supercharged’ strategies to provide extra whitening support without the potential risks associated with conventional whitening (bleaching) treatments.
The baking soda and lemon juice works but it is best done by mixing fresh on a daily basis and not by storing since the acid in the lemon and most of the other properties of the lemon mixed with the baking soda effect the way the paste performs. Try it for a week then give it a break though since you don’t want to damage the enamel of your teeth. It definitely made my white!
One thing to be aware of when it comes to whitening teeth is that certain natural whiteners can eradicate enamel. Some teeth whiteners are just not a good idea to use, especially lemon juice. While the lemon peel is actually a good, healthy way to whiten teeth, the juice itself is simply too strong. The acid in the actual lemon juice does great for bleaching clothes, hair and getting stains out of furniture, but you wouldn’t want to put lemon juice on your teeth as a mouth gum cleaner every single day. Eventually, the acid creates tiny holes in your teeth, and then every kind of staining type food will seep into these tiny holes and remain there. The acid from the lemons is so strong it just eventually wears away the teeth, causing cavities.
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