ST.SAJ Skin Journal

What Is The Skin Barrier? Your skin barrier is your body's first line of defence. Located on the outermost layer of the skin, it helps protect against environmental stressors while preventing excessive moisture loss. When...

Aren't They Basically The Same Thing? One of the most common skincare questions we hear is: "What's the difference between an essence and a serum?" Because both products are lightweight and applied before moisturiser, it's...

Is Your Skincare Routine Too Complicated? If your bathroom shelf is overflowing with cleansers, serums, treatments and products you rarely use, you're not alone. Many people assume that achieving healthy, glowing skin requires a complicated...

Confused About What Goes First? Essence, serum, moisturiser, SPF... with so many skincare products available, it's easy to feel unsure about the correct order to apply them. The good news is that skincare doesn't need...

Investing in Skincare But Not Seeing Results? If you've ever bought a product after seeing it all over social media only to be disappointed a few weeks later, you're not alone. Many people spend hundreds...

Feeling Overwhelmed by Skincare? With so many cleansers, serums, treatments and skincare trends constantly appearing online, it's easy to feel confused about where to start. Many people end up with a bathroom cabinet full of...

We're excited to share that ST.SAJ has been featured in The Carousel's article, The Best Korean Beauty Brands You Can Buy In Australia Right Now. As a brand inspired by Korean skincare principles, we're proud to...

Everyone talks about hyaluronic acid, but few understand why your skin is obsessed with it: HA has the ability to hold up to 1,000 times its own weight in water. That hydration is what gives...

What is mandelic acid? Mandelic acid is an alpha hydroxy acid (AHA) derived from bitter almonds. It's a chemical exfoliant, meaning it loosens the bonds between dead skin cells so they shed more evenly, revealing...