Does Kirkland Shampoo Cause Hair Loss? (Quality + Reviews)

Does Kirkland Shampoo Cause Hair Loss

Have you ever asked yourself or your friend if Kirkland shampoo causes hair loss? Is it bad for your hair? Well, you are at the perfect place to find the answer to such a question.

Costco has re-formulated their Kirkland Signature shampoo in the past, but the current product offered is Kirkland Signature Moisture Shampoo.

If you’re on the fence about trying a new shampoo and worried about potential hair loss, you’ve come to the right place. 

Kirkland Signature Moisture Shampoo has not been reported to cause hair loss. The main ingredient in shampoos that causes hair loss is sulfur, which Kirkland shampoo doesn’t have! 

In this article, we will discuss the ingredients of Kirkland shampoo, their benefits, discuss which ingredients in shampoos can cause hair loss, and provide some reviews of Kirkland shampoo. 

What Are The Ingredients In Kirkland Shampoo? 

While we don’t have the time to go over the entire ingredient list for Kirkland shampoo, we can discuss some of the main ones that make this shampoo a good choice. For instance, it includes: 

  • Avocado oil, 
  • Rainforest botanical extracts, and
  • Argan oil. 

Each of these provide specific benefits to your hair, but the focus of the Kirkland shampoo is to deeply moisturize! 

Read also: Who Makes Kirkland Shampoo? (Moisture, Professional, Conditioner, Discontinued)

Is Kirkland Shampoo High Quality? Reviews Available 

The reviews for Kirkland shampoo are raving. It has earned 4.4 stars out of 5 on Amazon, with customers praising its moisturizing qualities. 

Customers also appreciate that Kirkland shampoo is free from sulfates, parabens, and gluten. Sulfates are known to strip the skin of oils and leave your skin more susceptible to allergic reactions. 

The ingredients are also completely vegan and organic, which is just another added bonus! 

The price point of this shampoo is a little higher than other Kirkland products, but still a great deal compared to other shampoo brands, it sells online at $11.49 for a 33.8 fl oz bottle.

Although, your price may be cheaper from your local Costco warehouse.

What Type Of Hair Is Kirkland Shampoo Best For? 

Kirkland shampoo is best when used on normal or dry hair. 

Since it does emphasize moisturizing your hair it may not be the best choice for those with oily hair and could potentially leave your hair feeling greasy.

This has been the only major issue that customers have had with this product.

However, if you have damaged, colored, or naturally dry and frizzy hair, then this shampoo may be a good choice for you! 

Read also: Does Hair Fall Increase In Summer (5 Reasons & Helpful Tips)

What Are The Benefits Of Using Avocado Oil On Hair? 

Avocado is know to be a beneficial fruit to eat, and it’s oil contains:

  • Antioxidants, 
  • Biotin, 
  • Minerals, 
  • Fatty acids, as well as
  • Vitamins A, B-5, and E. 

According to Healthline, using avocado on your hair is a great way to “moisturize, repair, and strengthen” it.

Avocado oil has also been shown to help seal cuticle cells. This is important because this is what prevents your hair from breaking. 

So, avocado oil is one ingredient that would directly support hair growth and strength, not contribute to hair loss. 

Read also: Does Hair Fall Increase In Winter? (Reason – Helpful Tips)

What Are The Benefits of Rainforest Botanical Extracts? 

The Kirkland shampoo contains an assortment of oils and extracts that they describe as “rainforest botanical extracts.”

We will discuss a couple of the many contained in their shampoo to illustrate some of the benefits rainforest botanical extracts can provide to your hair. 

First, there is passiflora edulis seed oil, which is another name for passion fruit oil. The main benefit of this oil is that it contains antioxidant properties and can help moisturize dry skin. 

Next, aloe barbadensis leaf extract, which is taken from the aloe plant. This extract has long been used due to its moisturizing and anti-inflammatory properties. 

And finally, the last one we will discuss is punica granatum extract. This actually comes from pomegranates! It also has anti-inflammatory and antioxidant properties. 

As you can see, all of these extracts promote healthy hair growth, and it is clear to see why Kirkland has included rainforest botanical extracts in their shampoo as they all help to boost the moisture it can provide. 

What Are The Benefits Of Using Argan Oil On Hair? 

The main two benefits of argan oil is moisturizing and improving scalp health. The reason argan oil is used for moisturizing is because it contains fatty acids!

These help provide moisture to the strands of your hair and lock the moisture in. 

It also contains a good amount of vitamin E, which can help reduce dryness, frizziness, and help give your hair a lustrous shine! 

As for scalp health, according to Healthline, “argan oil has anti-inflammatory and antioxidant properties that are good for the skin.” It can help prevent skin conditions from occurring and improve them once they begin. 

Specifically, argan oil is known for presenting/improving conditions that cause hair loss, such as:

  • Psoriasis, and 
  • Seborrheic dermatitis.

What Ingredients Cause Hair Loss? 

Kirkland shampoo doesn’t include any ingredients that are known to contribute towards hair loss. One common ingredient often used in shampoos is sulfur.

Sulfur actually strips oils from your hair and can increase hair breakage and thinning hair. 

However, it is often included in shampoo formulas because it helps create a nice lather. 

Kirkland shampoo is free from sulfur! 

It also doesn’t include caffeine, which is known to limit blood flow.

If the blood flow to your scalp and hair follicles is inhibited, this can prevent maximum hair growth. 

Since Kirkland shampoo doesn’t have any of these problematic ingredients and is filled with moisturizing and strengthening ingredients, we can say that Kirkland shampoo doesn’t appear to be linked to any sort of hair loss. 

Final Thoughts: Kirkland Shampoo Does Not Cause Hair Loss

Kirkland Signature Moisture Shampoo has not been reported to cause hair loss. In fact, it has been formulated to potentially help prevent hair loss!

It contains some great ingredients such as avocado oil and argan oil which are known to moisturize and strengthen hair. 

Costco members love this shampoo formulation and it has overwhelmingly positive reviews online. 

If you’re curious about this Kirkland product you should head to your Costco warehouse or pick some up online. And, while you’re at it you might as well pair it up with their Kirkland Signature conditioner!



Lindsey graduated with an MBA in 2009. Since then, Lindsey has worked in the retail and consumer service industry as a manager, advisor, and marketer. Lindsey is also the head writer and Co-founder of Lindsey is based in Morgantown, West Virginia.

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