CosRX Low pH BHA Overnight Mask

Review: CosRX Low pH BHA Overnight Mask ★★★★.☆

CosRX Low pH BHA Overnight Mask

CosRX Low pH BHA Overnight Mask is a moisturizing sleeping mask that contains 0.9% BHA (beta-hydroxy acid) to chemically slough away dead skin, revealing a softer, brighter complexion in the morning. It works at reducing roughness and dullness throughout the night, all without irritating the skin.

I’m a huge fan of sleeping mask because they up my skincare game without much effort at all. However, I am concerned about the inclusion of palm oil and palm kernel oil in the ingredients. Just like coconut oil, it is able to soften and moisturize very dry skin. But unlike coconut oil, it can cause breakouts on some people. So I suggest patch-testing to see if your skin reacts negatively to it. Also do not use BHA products if you are allergic to aspirin.

Key ingredients:

  • Centella Asiatica Leaf Water 50.0% – soothe and calm
  • Betaine Salicylate (BHA) 0.9% – an oil-soluble active that is able to clear dissolve oil in pores
  • Niacinamide – brightening
  • Lactic Acid (AHA) – a water-soluble active that loosens bonds of surface dead skin cells to gently exfoliate them away
  • Tea Tree Leaf Oil – anti-inflammatory

$21 at Cupidrop | Use code NICESKIN to receive 15% off orders over $30. Expires April 30, 2018.

Centella Asiatica Leaf Water, Butylene Glycol, Helianthus Annus (Sunflower) Seed Oil, Glycerin, Betaine, Panthenol, Cetearyl Alcohol, Dimethicone, Elaeis Guineensis (Palm) Oil, Elaeis Guineensis (Palm) Kernel Oil, Beeswax, Gluconolactone, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Olivate, Sorbitan Olivate, Caprylic/Capric Triglyceride, 1,2-Hexanediol, Betaine Salicylate, Ethylhexylglycerin, Lactic Acid, Water, Niacinamide, Xanthan Gum, Sodium Hydroxide, Ethyl Hexanediol, Melaleuca Alternifolia (Tea Tree) Leaf Oil


50 g of product comes in a soft plastic tube with a screw on cap. I’m not sure if all retailers give out stickers with every order of this product but I did receive a set from Cupidrop. I absolutely went to town with it!


There was also a foil seal over the opening which I peeled off. Such is my preferred packaging for a cream product as it is hygienic and user-friendly.

CosRX Low pH BHA Overnight Mask

According to the CosRX website, the pH level of this product at room temperature is 4.5 with a variance of +/- 1. BHAs thrives in this mildly acidic state and so does our skin.

How to use:

Apply proper amount of cream evenly on face. For daytime usage, follow with a broad-spectrum sunscreen rated SPF 30 or greater.

CosRX Low pH BHA Overnight Mask

The overnight mask squeezes out very easily so be really careful not to over-squeeze. It is a white cream that carries a pleasant centella scent. People who dislike herbal scents might not enjoy this. As a person who appreciates herbal scents more than fragrance, I can’t stop sniffing this.

CosRX Low pH BHA Overnight Mask

The amount above is how much I use on an entire face if my PM routine is hydrating enough on normal skin days. I’d double the amount on busy nights when I don’t have the luxury of time for an extensive routine.

The product has a dry balm texture and gives a silky smooth finish. It’s not the easiest product to spread. So to prevent dragging my skin too much, I’d dot small amounts all over my face and smooth it out as gently as I can.

It is highly occlusive and does a great job at sealing in hydration to prevent water loss. After using this nightly for 2 weeks, my skin does seem a tad brighter and feels plumper. I really enjoy not waking up to tight skin or having lint stick to my face like some other stickier sleeping masks tend to do. I also like that it did not irritate my sensitive skin one bit, no stinging sensation whatsoever. This is second to my HG Sulwhasoo Overnight Vitalizing Mask, as it wasn’t able to calm redness and soften skin like SWS.

CosRX Low pH BHA Overnight Mask

My guess is that the percentage of BHA in this sleeping mask is too low to give any drastic results. Also, actives are meant to be applied to clean skin for it to be at its optimal efficacy, not over a bunch of other skincare products. And it wouldn’t make sense to apply a sleeping mask over clean skin because as an occlusive, it does not hydrate my skin enough.

To sum up, I’d say this is more of a moisturizing product to maintain clear skin. I don’t think it is meant to eradicate serious breakouts. Considering how affordable this product is, I think it is highly worth checking out!

$21 at Cupidrop | Use code NICESKIN to receive 15% off orders over $30. Expires April 30, 2018.

Go be beautiful!


One Comment

  • Lisa Zirkle

    If it weren’t for the palm oil and palm kernel oil which has a comedogenic rating of 4, I might give this a try. Olive oil has broke me out in the past.