PHA Skincare Products

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Gluconolactone, is a polyhydroxy acid (PHA), that works by gently exfoliating the surface of the skin and encourages skin cell production, making it ideal for daily use or for sensitive skin. With larger molecules than other exfoliating acids like glycolic acid, PHA toners remain extremely gentle while attracting water molecules for added hydration.

Frequently Asked Questions

Is PHA better than AHA or BHA?

It depends on your skin’s needs. AHAs like glycolic acid penetrate more deeply to resurface and brighten, while BHAs like salicylic acid are oil-soluble and target clogged pores.

PHAs are the gentlest option, offering mild exfoliation with added hydration. They are an excellent choice for first-time acid users or those with reactive, dry or sensitive skin. Medik8’s Press & Glow is a perfect daily PHA toner that delivers visible results without irritation and is gentle enough for twice-a-day use.

Is PHA the same as retinol?

No, PHA (polyhydroxy acid) and retinol are different types of skincare ingredients with unique benefits. 

PHAs are gentle chemical exfoliants that help smooth skin texture and boost radiance by removing dead skin cells, making them ideal for sensitive or reactive skin types. Retinol, on the other hand, is a form of vitamin A that supports skin renewal, visibly reduces fine lines and helps improve clarity over time. 

While they serve different purposes, both can be part of a well-balanced routine. For example, Medik8’s Press & Glow features gentle PHAs for daily exfoliation, while Crystal Retinal offers next-generation vitamin A to visibly rejuvenate the skin overnight.

What ingredients should you avoid mixing with PHA?

PHAs are generally well-tolerated and compatible with most skincare ingredients. However, layering them with strong exfoliating acids or high-strength retinoids may increase the chance of irritation, especially if your skin is new to actives. To maintain skin balance, introduce products gradually and avoid over-exfoliating.

Can you use PHA every day?

Yes, PHAs are gentle enough for daily use, even twice a day for some skin types. Medik8’s Press & Glow is formulated for twice-daily application, helping to gently resurface the skin while boosting hydration and delivering an even skin tone. Consistent use helps promote smoother, more radiant skin over time.

Can you use PHA with vitamin C?

Yes, PHAs and vitamin C can work well together. PHAs prep the skin by gently clearing surface debris, which may help improve absorption of your vitamin C serum. For best results, apply your PHA toner or serum first, then follow with your vitamin C in the morning. Or use PHAs in the evening as part of your nightly routine.