LÉ Blog

Tretinoin is by far the most famous retinoid of the Vitamin A category and for good reason. It has a prevalent history of use plus a long long history of validation for multiple benefits including acne, anti-aging, and hyperpigmentation. However, much like any other popular skincare ingredient, with its fame comes a few areas of confusion. Tretinoin beginners may find themselves asking questions like, is using tretinoin long term actually bad for me?. Am I still purging? Or is this concentrat...

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Azelaic acid is one of those hot ingredients with data showcasing its ability to help tackle major skin concerns such as hyperpigmentation, acne, and even rosacea. However, the challenge with this ingredient is that in order to achieve these benefits you’ll need a LOT of it in your skincare (read: major formula challenges for chemists). The other difficulty is that it’s also regulated so you typically would need a prescription to get those higher concentrations (15-20%) and won’t be able to p...

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Uneven skin tone, post-inflammatory hyperpigmentation, dark spots, sun spots, acne scars, melasma… it doesn’t matter what type of hyperpigmentation concern you have, this is one of THE most stubborn skin concerns to tackle. This is an arena where you don’t just need one single BEST ingredient, but a whole family of clinically validated hyperpigmentation-busting ingredients. So let’s go through some of the ingredients you’ll likely come across in your quest to brighten, even skin tone, and tac...

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Vitamin C serums is probably one of the most popular products with countless new launches every year. Their lasting popularity make a lot of sense! Simply put, Vitamin C (specifically ascorbic acid) is one of the most validated actives in the skincare world for its clinical benefits. It has been proven to prevent free radical damage, brighten hyperpigmentation, and even boost collagen production. But given vitamin C’s popularity, it’s only gotten MORE difficult to choose the best vitamin C se...

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There’s an ingredient that's probbbaaabbbly not quite on your skincare radar yet - but we think it’s worth considering. The ingredient is called Silymarin (sih-lee-mae-rin), and comes from the extract of milk thistle. You'll find it on the ingredient list as "Silybum Marianum Fruit Extract", usually in a handful of clinical brands such as Skinceuticals, PCA Skin, and Dr. Dennis Gross…. And most recently our very own Mr. Reliable 2.0! Silymarin is a potent antioxidant with anti-inflammatory pr...

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In this part 2 of our pigmentation guide, we’re going to shed some light on how to shop for the best ingredients & products to target that stubborn hyperpigmentation and build a successful routine. This will mirror a lot of what we talked about in our hyperpigmentation podcast episode, so check out the episode here if it’s easier for you to listen to it. Set Your Expectations Nope! It’s not just your imagination, that dang dark spot is persistent which makes tackling this skin concern pretty ...

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We often remind people that regardless of what you read on the interwebs (yes! Even here), always remember to listen to your skin. Unfortunately, sometimes it feels like your skin is speaking pig latin. So how the hell do you really know your skincare is working for you? And real talk… how long is it supposed to take for you to see results? All great questions, and it turns out, different product types have different evaluation criteria. So let’s walk through some skin product evaluation guid...

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Let’s take a closer look at another one of the chemists’ favorite active ingredients: niacinamide (aka. vitamin B3). This is a prolific ingredient you can find in absolutely every type if skincare product imaginable — cleansers, serums, moisturizers, sunscreens, you name it. This is because it's a truly a jack-of-all trade ingredient with multiple proven skin benefits. Let’s take a look at all the things niacinamide can do for you! Barrier function First and foremost, niacinamide can improve ...

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You can find AHAs in a wide range of products from cleansers to night creams. Just what are AHAs anyway? AHA stands for alpha hydroxy acid — a class of water-soluble weak acids that has a long history of use and proven skin benefits. Some commonly used in skincare are: glycolic, lactic, malic, citric, mandelic, and tartaric acid. It's one of our "big 4" actives that we swear by. We love AHAs so much, we developed a whole line of booster masks starring our favorite AHAs. So let's take a look a...

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We all love that summer sun, but too much of that toasty goodness can make unwanted uneven skin tone, hyperpigmentation rear its ugly head. As summer winds down, it’s the perfect time to tackle those uneven patches, discolored spots, and brighten skin. Check out our book Skincare Decoded for a dedicated chapter on hyperpigmentation and routine building to tackle hyperpigmentation. A Biology Primer on Pigment Formation To tackle hyperpigmentation, let's take a closer look at the biology of ski...

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