15 Harmful Shampoo Ingredients to Avoid

harmful shampoo ingredients

Did you know that your shampoo can contain ingredients harmful to both you and the environment? Chief among them: Sulfates. But what exactly are sulfates, and what other problematic shampoo ingredients should you avoid? Instead of harmful shampoo brands to avoid, we’ve made a list of 15 common and not-so-nice shampoo ingredients to watch out for — and why. What are the main ingredients of shampoo to skip? Read on to find out.

1. Ammonium Lauryl Sulfate or Sodium Laureth Sulfate (SLES)

What are sulfates? Sulfates are very strong detergents that work through a chemical reaction, in which they bind with the sebum on our scalp and with water. When you rinse out the shampoo, sulfates take all the oils and residue with them. But while cleansing, they can also damage the hair, make it brittle, and increase frizz.

2. Sodium Lauryl Sulfate (SLS)

This sulfate creates a lathering foam some people love, but it can compromise follicles when left on the scalp and it has other toxic effects on the human body. Yikes! Anyone with color-treated hair or dry hair should definitely avoid SLS, as it can fade your color and strip your strands of natural oils.

3. Parabens

Parabens are also known to be harmful. They are used as a preservative to prevent bacteria from growing in cosmetics and shampoos. Parabens can mimic the hormone estrogen and have been linked to increased growth of breast cancer cells.

4. Sodium Chloride

Sodium chloride is another name for salt. Sodium chloride in shampoo and conditioner is mainly there to make the consistency thicker. Salt can make an already sensitive scalp dry and itchy, which can eventually cause hair loss.

5. Polyethylene Glycols (PEG)

PEG is a thickening agent derived from petroleum that is often contaminated with byproducts. There has not been sufficient research done to conclude that PEGs themselves are as toxic as shampoo ingredients, but common byproducts in PEGs can be harmful.

6+7. Diethanolamine (DEA) and Triethanolamine (TEA)

DEA and TEA are also emulsifiers and foam agents that reduce surface tension so water-soluble and oil-soluble ingredients can blend together. In 1998, researchers found a link between the topical application of DEA and cancer in animals, but the effects on humans are unclear. The European Commission has banned DEA in cosmetics.

8. Formaldehyde

Formaldehyde is a known human carcinogen and has been proven to be absorbed through the skin in animal testing. Manufacturers often add it to products directly as a preservative, but it can also be released over time through a chemical process from other types of preservatives. If you’re wondering what to look for, a common one in shampoos is quaternium-15. They can also be found in chemicals used for Brazilian blowouts at hair salons.

9. Alcohol

Most alcohols have a drying effect, and the higher up in the ingredient list it appears, the more of it the product contains. Some alcohols that are not as bad for dry hair begin with a “C” or an “S,” like Cetearyl alcohol and Stearyl alcohol. They can actually help your hair retain moisture. The ones that are bad if you already have dry hair usually have a “prop” in their name, like Isopropyl alcohol or propanol.

10. Synthetic Fragrances

Products that have “fragrance” on their label can contain thousands of hidden chemicals. Some ingredients in fragranced cosmetic products can disrupt the reproductive system and cause cancer or asthma. They can also irritate the skin and scalp, which can lead to hair loss.

11. Synthetic Colors

Most shampoos and conditioners are dyed with a synthetic color to make them look nice. These colors come from petroleum or coal-tar sources, all of which come with harmful health effects. Synthetic colors will normally go by FD&C or D&C combined with a number.

12. Dimethicone

Dimethicone is a type of silicone that is used in a ton of hair products and contributes to product buildup that makes your hair feel greasy. Since it acts as a protecting cover on the surface of the hair, it stops moisture and nutrients from coming in and instead collects dirt and residue. It can clog the pores on the scalp and cause skin irritation.

Harmful shampoo
Do you know all of your shampoo ingredients? Some of the ingredients in your favorite shampoo can be harmful to you.

13. Cocamidopropyl Betaine

Cocamidopropyl betaine is another foam booster. Although it’s derived from coconut oil, it can have negative effects. This surfactant is used in hair products along with dimethylaminopropylamine, which can cause skin irritation, allergies, rosacea, and eczema.

14. Triclosan

Triclosan was banned from being used in antibacterial soaps in 2016 but is still allowed in toothpaste, shampoos, and deodorants. It’s a chemical antibacterial agent known to cause hormone disruptions, which can lead to cancer and affect fetal development, among other things.

15. Retinyl Palmitate

Retinyl palmitate is the ester of retinol combined with palmitic acid. It’s a known skin irritant that can cause peeling, scaling, redness, and itching. Side effects of retinyl palmitate may include cancer, reproductive problems, and organ toxicity.

Harmless Shampoo Ingredients

While there are many bad ingredients in shampoos and harmful shampoo brands, plenty of shampoos use only natural, non-toxic, and organic ingredients, and you can even make your own homemade hair treatments using things from your kitchen. If you are suffering from hair loss or unhealthy hair growth and think chemicals such as the ones mentioned above may to blame, try switching to a natural alternative. You can also try taking natural supplements that contain plant-derived ingredients that work synergistically to help your natural hair growth.

Seldom or Frequently – How Often Should You Wash Your Hair?

How Often Should You Wash Your Hair?

For the past few years, beauty experts and hair stylists have warned women to not wash their hair every day. But how often should you wash your hair?

Shampooing Too Often

It used to be said that shampooing too often would dry out your scalp and strands, making the hair brittle. This is because your hair produces natural oil, called sebum, which is what keeps your hair shiny. But shampoo traps the sebum, along with any dirt and residue from hair products. When we rinse it all out the hair is stripped of any oils.

It makes sense that doing this too often would dry the hair out, which is why many women have a routine to go to the salon, have a wash and a blowout, and then let the hair rest for about a week. Some dirt is okay and even good for the hair, as it provides moisture and a protective barrier for your scalp.

Shampooing Too Little

However, according to many hair stylists, more and more people are exaggerating the habit of not washing too often. According to hair stylist Michael Angelo in Manhattan, many of his male clients even come in to ask him to tell their girlfriends and wives to wash their hair, because they smell so bad. He says many people have a blowout and then leave the hair alone for ten days, even if they work out and break a sweat.

Dry shampoo is often seen as a strategy to make this work, and Angelo is not opposed to that, but pointed out that it only buys you an extra day or two. The thing is that oil buildup together with product residue will layer itself on your scalp and could clog the hair follicles, leading to an oily, itchy and flaky scalp.

How Often Should You Wash Your Hair?
How much and what kind of hair products you use will have an impact on how often you need to wash your hair.

“Women have been badgered for washing their hair too often, but products are so much better than they were even five years ago,” said hair colorist Rita Hazan.
“But some of them are gentle enough to use daily.”

If you go a long time without washing and have flaky skin on the scalp, a good solution for this could be hair exfoliation. This can help give your hair a deep cleanse, increase blood circulation and make your hair products more effective, as the scalp is fresh and clean.

So, How Often Should You Wash Your Hair?

There is not one good solution that works for everyone, as everyone has different hair thickness, quality and amount of sebum. How often should you wash your hair? Carolyn Goh, is an assistant clinical professor of medicine at the UCLA. Goh said that only a small group of people need to wash their hair every day; people that work out or sweat a lot, or live in a very humid place. And if you have very oily hair, or dandruff, you’ll also need to wash more often. She recommends every two to three days, but it is all a matter of personal preference.

Photo credits:

Mainstream via Flickr