Lactic acid is great, and has long been the go-to alpha hydroxy acid (AHA) for years; it hydrates as it exfoliates, and is less irritating than glycolic acid. But mandelic? This one is quietly developing a reputation as the newcomer-friendly upgrade your skin never knew it needed.
So, what is the comparison of the two? Well, here we go.
A Little Background on Both
Both mandelic and lactic acids belong to the AHA family. They dissolve the connections between the dead cells of the skin and make a newer, smoother base appear beneath.
Lactic acid is milk-based (though most versions in skincare today are lab-made). It’s famous for being hydrating while exfoliating, making it a longtime favorite in peels and serums.
Mandelic acid is derived from bitter almonds. It is larger in size thus making it less irritating as it penetrates the skin slower.
Briefly, lactic acid works quicker but may be more violent when over-applied. Mandelic acid is milder and lenient but it is also effective in the long-term.
Texture, Sensitivity, and Tolerance
Mandelic acid serum can feel like a lifesaver, especially when you have already tried an exfoliant that either stings, causes redness or leaves a spotty rash. Due to its slow absorption, your skin gets time to adapt.
Lactic acid is milder than glycolic, and yet it can be too much for people with reactive skin. When you are sensitive, have rosacea or breakouts from harsh actives, mandelic acid can make it to the top.
Brightening and Acne-Fighting Benefits
Both acids improve texture and tone, yet mandelic acid goes a step further. Dermatologists report its antibacterial properties, which is particularly effective on acne-prone skin. Studies indicate that it clears pores, reduces swelling, and diminishes post acne scars.
Lactic acid, meanwhile, excels at improving dullness and uneven tone. It also hydrates, so when dryness is the primary issue, lactic may edge ahead.
Anti-Aging Effects
Both acids can be used to treat fine lines and uneven skin texture. However, lactic acid is more scientifically proven to be effective in skin elasticity and natural hydration.
Mandelic acid is no less effective. Its non irritating quality enables individuals to use it regularly, meaning results build steadily without the stop-and-start frustration that can come from irritation.
The Best Way to Use Them
Use mandelic acid as a starter AHA. Use it two to three nights a week and slowly increase as your skin adjusts. Pair it with a hydrating routine—for example, a pure hyaluronic acid serum under your moisturizer—to help prevent dryness.
Lactic acid also works well a few nights a week, When you have dry skin, you will probably like its moisturizing effects. Sunscreen should always be applied after that, since both acids make the skin susceptible to the sun.
So, Which One’s Better for Beginners?
If we’re talking strictly about beginners, mandelic takes the crown. It’s slower, gentler, and more forgiving, making it easier to stick with consistently.
Lactic isn’t off the table, though. If your skin leans dry and you’re not overly sensitive, lactic acid might feel like the perfect fit.
Bottom line? Think about your skin type. If you’re acne-prone, sensitive, or cautious about starting with exfoliants, mandelic is your guy. If you’re dry, dull, and looking for hydration with exfoliation, lactic is still a great bet.
FAQs
Q: Can I use mandelic and lactic acids together?
Yes, but not at the same time. Alternate nights if you want the benefits of both.
Q: Is mandelic safe for darker skin tones?
Absolutely. In fact, it’s often recommended because it has a lower risk of causing hyperpigmentation compared to stronger acids.
Q: Which one works faster?
Lactic acid tends to deliver visible results sooner. Mandelic takes a bit longer but is much gentler.
Q: Do I still need sunscreen if I use these acids at night?
Yes. Both make skin more sensitive to the sun, so SPF in the morning is non-negotiable.
Q: What’s the best way to avoid irritation?
Start slow, apply only a thin layer, and always follow up with hydration.
