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Polyhydroxy acids (PHAs) are the new and improved cousins of alpha hydroxy acids (AHAs). They work as chemical exfoliants, and are therefore useful in skincare. They work slowly, which makes them fairly mild. People with sensitive skin can use PHAs without any problem.
PHAs remove dead skin cells from the uppermost layers of skin to reveal soft, bright skin. If you have dull, tired-looking skin, PHAs are the right ingredient for you. They also have antioxidants that protect the skin from UV damage, and make the skin’s barrier stronger. PHA protects collagen from breaking down, which keeps your skin looking younger for longer.
They are mild, so they work slowly – which may not be what you want. PHAs are exfoliants, so be careful when you start using them, especially if your skin is sensitive or damaged. Skin that reacts to new products may find PHAs irritating, mild as they are. Pregnant and breastfeeding women, and people with skin infections or open wounds should avoid using PHAs.
Oily skin occurs when the sebaceous glands in the pores are producing more oil, or sebum, than necessary. Sebum is natural in all skin as it keeps the skin moist and healthy. Over production of sebum can be caused by hormones, genetics or could even be a result of dry skin over-compensating by producing extra oil, in order to retain some measure of moisture.
Oily skin can also be caused by using the wrong products for your skin type. For example, if you are using overly drying soaps and astringents for your skin type, your skin may respond by over producing oil to compensate, as mentioned above. This can create an unfortunate cycle of using harsh soaps to eliminate oils, but instead exacerbating the problem.
On the other hand, overly oily makeup and products can also cause oily skin.
Ingredients that help exfoliate dead skin cells to keep pores unclogged and increase new skin cell production, such as Vitamin A/Retinol, glycolic acid, and salicylic acid, are good for treating acne as well. Benzoyl peroxide is a topical agent for fighting bacteria and unclogging pores. It is one of the longest-used medications to keep oily pores clean and healthy. Jojoba oil is also good for fighting bacteria trapped in oily skin and maintaining a moisture barrier to prevent over-production of sebum.
PHA may be effective for oily skin, but there are many other factors that may affect whether this ingredient would work on your skin or if there are better ingredients that may work for you. Take this skin quiz to find the best ingredients for your skin and build your skincare routine.
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