All Monday products are paraben- and SLS-free, making them safe to use on color-treated hair. While I had a great experience with this formula, a few of the ingredients in the Smooth range don’t pass our ByrdieClean Beauty Pledge. Both the shampoo and conditioner contain BHT (butylated hydroxytoluene), a commonly used preservative linked to skin irritation and hormone disruption. I didn’t experience any reactions, but if your scalp tends to be extremely sensitive, I would recommend doing a small patch test before incorporating this duo into your regular routine, or go for a more scalp-focused set. Calloway Cook is the President of Illuminate Labs and has reviewed over 1,000 clinical trials. See full bio., Author | Beth Lertzman MD Panthenol is an effective ingredient unique to the conditioner that was shown in a medical review published in the Journal of Cosmetic Science to hydrate the skin, which suggests it can improve scalp and hair health. Monday Haircare Smooth Shampoo and Conditioner now have a permanent spot in my bathroom, and I can’t wait to see what else the brand comes up with. If you’re looking for your next shampoo/conditioner pairing, shop Monday’s U.S. launch and get the best set for your hair type.

Vitamin E is an antioxidant that is known to protect cells from free radicals, and has been known to help support a healthy scalp and hair growth. It’s found readily in nuts and broccoli, but handily, we’ve also included it in our range. (You should probably still eat your broccoli.) So, this was enough about what Monday shampoo is, and now let’s see what it actually does to your hair. Is Monday Shampoo Suitable For All Hair Types?Calloway Cook is the President of Illuminate Labs and has reviewed over 1,000 clinical trials. See full bio., Author Another great thing about this shampoo is that it is free from parabens and SLS. These two chemicals are known for making your hair squeaky clean, but they also cause damage.

Overall, all of the Monday shampoos are safe to use, and they are formulated for people with damaged hair.

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I couldn’t go through this Monday Haircare review without mentioning what customers didn’t like about the products. Some users reacted negatively to the shampoos, saying their scalp felt irritated. However, this could be due to one ingredient rather than the entire shampoo concoction. A YouTube creator with self-described hair damage and dry hair tried Monday Shampoo for two weeks in an unsponsored review and shared her thoughts about whether or not it’s effective:

Affordable: Monday Haircare is a relatively affordable haircare brand compared to some of the high-end salon brands available. The range includes four distinct lines: SMOOTH, which is ideal for curls and frizz; MOISTURE, made for normal to dry hair and coils; VOLUME, which helps invigorate thin, fine and oily hair; and GENTLE, for hair and scalps that need a little extra TLC. Benzyl alcohol , phenoxyethanol and ethylhexylglycerin are synthetic preservatives, and at least one of them was shown to be toxic to human cells in a clinical trial .The brand claims this shampoo not only cleanses the scalp deeply but also tames the frizz and makes the hair super-smooth and hydrated. A YouTube creator named “SummerNicole” reviewed Monday Smooth Conditioner in an unsponsored video and explained why it didn’t work for her: Moreover, many recently took over the internet and complained about the silicone in Monday shampoo.