The Ultimate Guide to Using Toothpaste for Dark Underarms

You heard it right; toothpaste can lighten your dark underarm. 

Toothpaste for dark underarms treatment has been very popular nowadays. So many people are shifting to this ready DIY dark underarm treatment. Many YouTube videos claim that toothpaste does the trick. Though it’s not scientifically proven. However, you must take precautions when using this remedy since your underarm is sensitive.

You aren’t supposed to apply just anything on your underarm. However, you can use white toothpaste because the colored ones may contain artificial fragrances or chemicals that may irritate your skin.

The most effective is a toothpaste that contains abrasives or is meant to polish teeth. Just like they clean teeth, toothpaste containing bleaching agents like baking soda or abrasives remove dead skin and remove bacteria.

The Ultimate Guide to Using Toothpaste for Dark Underarms
The Ultimate Guide to Using Toothpaste for Dark Underarms

What are dark underarms?

Dark underarms are armpits that are darker than your entire body’s skin. Your underarms are supposed to be the same color as your body’s other parts. So it’s something that shouldn’t worry you.

However, some people get embarrassed, especially when wearing tank tops or swimsuits. Dark underarms treatment dermatologists say it can be a skin condition referred to as acanthosis nigricans (AN). It’s a condition that causes thickening and darkening in body folds, including;

  • Back of the neck
  • Armpit
  • Groin
  • Knees
  • Elbows

You may also experience itching and sometimes foul smells in those areas. Anyone can get AN, but the most vulnerable are people with darker skin than people with light skin.

In other cases, the darker armpits can result from deodorants or frequent rubbing of topical ointments. So using toothpaste as an underarm whitening home remedy fast should be effective. However, the sweat also causes underarms to darken because bacteria flourish, causing the smell.

Most people prefer shaving under their arms to clear the fuzz in their armpits, which contributes to underarm discoloration. Frequent shaving removes the protective layer of your skin. This exposes the sensitive skin of your armpit to underarm products and dirt, causing darkening.

The Ultimate Guide to Using Toothpaste for Dark Underarms
What are dark underarms?

How to use toothpaste for dark underarms in the right way?

There are several ways you can use toothpaste to clean your underarm. For effective and fast results, you should use plain toothpaste or toothpaste mixed with other ingredients.

Let’s check what you can mix with toothpaste to eliminate darker arms within seven days.

  1. Ingredients: Toothpaste for dark armpits


  • Clean your armpits to wash away deodorants
  • Apply toothpaste
  • Wait about 10 minutes until it dries up
  • Rinse with water
  • Use moisturizer
The Ultimate Guide to Using Toothpaste for Dark Underarms
How to use toothpaste for dark underarms in the right way?

Plain toothpaste may also work, but mixed with other ingredients works magic.

  1. Ingredients: Toothpaste and baking soda
  • A teaspoon of baking soda
  • Unflavored toothpaste
  • One bowl
  • Spoon


Mix the baking soda with the toothpaste in a spoonful bowl until it mixes well. Apply it on your armpits generously and wait until it dries for about 7 minutes. After drying, clean it using a cleanser, and repeat the process twice or thrice a week

  1. Ingredients: Toothpaste mixed with lemon juice
  • Uncolored toothpaste
  • 4 tablespoons of lemon juice


Use the mixing bowl to mix the lemon juice and the toothpaste thoroughly. Apply on your armpits using your fingertips, then wait for 5 minutes. Rinse the mixture using lukewarm water. Repeat the remedy three times a week. But in case your skin is sensitive, you can apply twice weekly.

  1. Ingredients: Tomato juice and white toothpaste
  • Tomato juice contains lots of lycopene, which helps unclog pores and reduces armpit discoloration.
  • Use three toothpaste of tomato juice
  • Toothpaste with low fluoride
  • A mixing bowl
  • Spoon


Pour your tomato juice and the toothpaste into the same bowl. Then carefully mix until the tomato is evenly distributed in the toothpaste. Using your fingertips, apply the mixture and leave it for 5 minutes. Then you can rinse your underarms with lukewarm water.

  1. Ingredients: Baking soda, toothpaste, and rice powder
  • A tablespoon of baking soda
  • 2 tablespoons of apple cider vinegar
  • 2 tablespoon rice powder
  • White toothpaste


Mix all ingredients in one bowl thoroughly for a minute or more. Apply in your armpits and let it dry for 7 minutes. After that, clean using a cleanser and do it twice or thrice weekly according to your skin sensitivity.

  1. Ingredients: Toothpaste lime and turmeric for underarms

Turmeric acts as a bleaching agent and, if mixed with toothpaste, may give you your desired results. 

  • A tablespoon of turmeric powder
  • 4 tablespoons of milk
  • Toothpaste


Mix the three gradients well and apply them to your underarms. Wait until it dries, then wash it with a cleanser. You may apply coconut oil as a moisturizer to keep your skin to avoid friction that causes discoloration.

Remember that if you develop rashes on your armpits, take care of them before using the mentioned DIY remedies for dark underarms. Ensure your dermatologist treats them and they get healed.

How to choose the best toothpaste for dark underarms?

How to choose the best toothpaste for dark underarms?

When choosing the best toothpaste, ensure the toothpaste is not colored or flavored. This is because these additives may irritate your underarm, making you uncomfortable.

Another thing you should consider when buying toothpaste for underarm lightening, it should have a bleaching agent. The toothpaste is a tooth whitener that removes clogs and bacteria build up on your teeth.

However, when checking for the active ingredients. Ensure the toothpaste is simple and contains a low fluoride percentage. In addition, do a patch on any less sensitive skin part of your body before trying it on your armpit. This helps you determine the effect the toothpaste will have on your skin.

After using the toothpaste, it’s time to learn a thing or two to maintain your armpit’s light.

  • Ensure your armpits are clean to prevent sweat buildup
  • Maintain a healthy body since obesity causes hyperpigmentation
  • Avoid smoking; it contributes to skin darkening
  • And moisturize using vaseline for dark underarms
  • Wear loose clothing to avoid excessive sweating

Possible side effects of using toothpaste for dark underarms

Underarms are very sensitive, and the toothpaste may irritate if you use it. Mostly this DIY armpit lightener doesn’t have a lot of side effects. But even with the slightest wound, when you apply toothpaste with other ingredients like baking soda, it will irritate.

If you have sensitive skin, baking soda armpits’ side effects may be very irritating. Here, you can use Vaseline for dark underarms to moisturize them in case of irritations.

To avoid baking soda armpits’ side effects, test your skin to check how it would react. Before using it on your underarms, choose a patch on other parts of your body. Apply the remedy, and it’s good to use if you don’t get any side effects within 48 hours.

To minimize toothpaste side effects, use simple and white toothpaste.


What are the best toothpaste brands for dark underarms?

Colgate‘s fluoride is one of the best brands to lighten your underarms. For example, if you use Colgate and lemon for underarms, you will see the positive effects within 7 days. Mix the lemon and Colgate toothpaste well, then apply it on your armpits using the tips of your fingers. Wait for 10 minutes, then clean using lukewarm water. Then repeat it twice a week and enjoy the results.

What are the best toothpaste brands for dark underarms?

Can I use baking soda instead of toothpaste to clean my underarms?

Yes, you can; if you keep asking why my underarms are very black, here is a solution for you. You can use baking soda. Mix the baking soda with water or rose water to make a grainy paste. Then apply it in your armpits in a circular motion, then gently scrub for about a minute. Finally, wash with plenty of water to rinse. You can also repeat this procedure twice a week too.

Should I brush my teeth after every time I use toothpaste on my dark underarms?

It depends. According to the American dental association, everyone should brush their teeth twice daily. So if you don’t brush your teeth using the underarm whitening remedy, you should. But if you have already brushed, you should wait until the next time. Just ensure you brush your teeth twice in the morning and before going to bed.

Do any other methods work better than toothpaste for removing dark underarm skin?

Toothpaste is the simplest DIY method of whitening your armpits. There are other methods, like the use of baking soda. You can try another if you don’t want to use any of these home remedies. The other means is to take preventive measures to avoid your underarms from darkening. You can try to undo all those things that cause the darkening. For example, use waxing instead of shaving, wear loose clothes and change underarm products.


Dark underarms are common but quite embarrassing, especially if you want to dress to kill!

Many reasons may cause it, but there are so many ways to undo it. One of the ways is using toothpaste as simple as Colgate fluoride. If it persists, you can also seek professional treatment to brighten your underarms.

Whichever method you use, remember we have different skin, so different treatments may work better on others than you. So go for the method that is best for you.

Also read – How to Get Mouthwash Taste Out of Mouth?

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