Kirkland Signature Moisture Conditioner Review

Kirkland Signature aka Costco's color-safe conditioner makes your hair feel silkier in just a few minutes—but don't expect it to remove 100% of your frizziness.

If you don’t mind using the same shampoo and conditioner for weeks on end, buying hair care in bulk will save you a lot of time and money. Kirkland Signature (Costco) makes its own brand of color-safe hair care products that describe themselves as “professional salon formulas” that are safe for color-treated hair. I highly recommend buying this pair of hair care products, particularly if you don’t want to think about repurchasing a refill of conditioner or shampoo for weeks on end—each bottle lasts for quite a long time.

I reviewed Kirkland Signature Moisture Shampoo a little while ago, and today I’m going to dive into the accompanying conditioner: Kirkland Signature Moisture Conditioner. This is a great bulk beauty buy that really does feel like you’re treating yourself to a salon experience, without the accompanying price tag. If you don’t have a car or way to get to Costco in person, you can buy it from Google Express or Amazon.

Let’s dive into the ingredient list and ask my dad for his thoughts.

Kirkland Signature Moisture Conditioner Review

Kirkland Signature Moisture Conditioner ingredients

Just like the Kirkland shampoo, I couldn’t locate the ingredients for this conditioner anywhere online, so I had to type them out manually after taking a picture of the back of the bottle. Here they are:

water, cyclopentasiloxane, cetearyl alcohol, stearyl alcohol, centrimonium chloride, behentrimonium methosulfate, helianthus annuus (sunflower) seed oil, lycium barbarum fruit extract, aloe barbadensis leaf extract, camellia sinensis leaf extract, cucumis sativus (cucumber) fruit extract, persea gratissima (avocado) fruit extract, punica granatum extract, malanin, vitus vinifera (grape) seed extract, helianthus annuus (sunflower) seed extract, glycereth-26, dimethiconol, divinyldimethicone/dimethicone copolymer, fragrance, gluconolactone, centrimonium bromide, panthenol, ppg-3 benzyl ether myristate, jojoba esters, quaternium-91, amodimethicone, hydroxyethylcellulose, cetrimonium methosulfate, sodium benzoate, c11-15 pareth-7 peg-45m, laureth-9, aminomethyl propanol, glycerin, butyrospermum parkii (shea) butter, c12-13 pareth-23, c12-13 pareth-3, cinnamidopropyltrimonium chloride, trideceth-12, citric acid, ethylhexyl methoxycinnamate, sodium ascorbyl phosphate, butylene glycol, hydrolyzed soy protein, tocopheryl acetate, hydrolyzed vegetable protein pg-propyl silanetriol

Some noteworthy ingredients:
- cyclopentasiloxane: a conditioning agent
- ethylhexyl methoxycinnamate: also known as octinoxate, an FDA-approved active sunscreen ingredient.
- lots of plant extracts like sunflower seed oil, cucumber extract, sunflower seed extract, avocado extract, grape seed extract, and aloe

This conditioner actually shares quite a few ingredients in common with its shampoo counterpart, Kirkland Signature Moisture Shampoo. They both contain:

  • persea gratissima (avocado) fruit extract
  • amodimethicone
  • punica granatum extract
  • quaternium-91
  • tocopheryl acetate (vitamin E)
  • ppg-3 benzyl ether myristate
  • trideceth-12
  • aloe barbadensis leaf extract
  • cucumis sativus (cucumber) fruit extract
  • c12-13 pareth-23
  • sodium ascorbyl phosphate (a form of vitamin C)
  • glycerin
  • citric acid
  • panthenol (pro-vitamin B5)
  • hydrolyzed vegetable protein pg-propyl silanetriol
  • lycium barbarum fruit extract
  • divinyldimethicone/dimethicone copolymer
  • c12-13 pareth-3
  • camellia sinensis leaf extract (green tea extract)
  • helianthus annuus (sunflower) seed oil
  • laureth-9
  • vitis vinifera (grape) seed extract

My Dad the Chemist’s review of Kirkland Signature Moisture Conditioner

Dear Emily, looks like a great hair conditioner based on the ingredients! The actual composition can be formulated differently to suit the type of hair ( Dry, oily, curly. Kinky...)
A good one should condition the hair without weighing down or feeling greasy.


My dad’s a fan of this conditioner, and so am I. It’s interesting that different hair conditioners can contain the same ingredients, just in different ratios to address different types of hair problems (dryness, oily scalp, curly hair, frizziness, etc.).

This conditioner contains glycerin, which can irritate the skin/scalp if you don’t rinse it out. So make sure to rinse it out all the way—this isn’t a leave-in conditioner.

Kirkland Signature Moisture Conditioner Review

My dad and I both think that Kirkland Signature Moisture Conditioner is a great conditioner. It has a pleasantly luscious texture, almost reminiscent of sweetened condensed milk. This means that it’s just thick enough to coat your hair pretty nicely, but it still rinses out nicely without weighing down your hair.

A little background about my hair: It’s coarse, slightly frizzy, wavy, and color-treated. My hair always feels nice and silky right after rinsing this conditioner out. Although it doesn’t get rid of all frizziness, it never leaves my hair feeling oily or weighed down, and it adds a bit of shine, too. I recommend trying it out if you have color-treated hair. It makes your hair color look less dull if it’s in need of freshening up (like mine). It also does a decent job of detangling your hair.

I really like Kirkland Signature’s approach to developing hair care products. I wonder if they’ve formulated any other personal care products that are worth trying! If you have a favorite Kirkland Signature item, let me know in the comments.

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