The composition of coffee and cigarette smoke has a high tendency to stain teeth. The only foolproof way to prevent these stains from ruining your smile is to quit smoking and drink coffee completely. Some dentists recommend toothpaste to gradually reduce the teeth slightly, but if you continue to smoke and drink coffee, the benefits of whitening toothpaste are only temporary. If you have coffee or smoking habits, talk to your dentist and ask for tips for tooth whitening toothpaste.

Surface tension
Drink coffee and smoking stains deposit in the outer layer of the teeth. Over time, the stains tend to be fixed, making them more and more difficult to remove. Toothpastes designed to remove these stains often rely on abrasive ingredients to help lift them up. Brushing your teeth with tooth whitening toothpaste can help loosen and remove stains, but abrasiveness can also damage enamel.
Chemical Reactions
The toothpaste brands have different ingredients and are claimed to have whitening effects. Some chemicals, such as blue covarine, are widely included in toothpaste to help make teeth look whiter. But they may not actually reduce the yellowing of the teeth but just cover up the stains. Only dental professionals can prescribe and provide whitening treatments that involve complex solutions to remove deep stains. [1
Rough Shedding
Toothpaste helps whitening teeth that are dyed by drinking coffee or smoking contain abrasive ingredients, as if they were scraping barnacles from the boat. Even if you use toothpaste with abrasives and chemicals, it turns out to be effective, and it can take up to six weeks to see any noticeable stain relief. Baking soda - safe to eat in baked goods - is a special ingredient in some anti-fouling toothpastes and is known for its ability to whiten teeth, with minimal chemical interaction.
Brushing fame
]The American Dental Association lists a dozen toothpastes that meet the minimum requirements for helping whitening coffee and cigarettes. These products have earned the e ADA safety and effectiveness approval seal. ColgateThe brand received the most recognized seals, followed by Crest and Tom's of Maine tooth whitening toothpaste for most people.