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Have you ever wondered why PDRN (Polydeoxyribonucleotide)—often called “Salmon DNA” or “Trout DNA”—has become the holy grail of Korean skincare? What Is PDRN and Why Is It Used in Skincare? PDRN (Polydeoxyribonucleotide) is a mixture of low–molecular weight DNA fragments derived from the sperm cells of Trout (Oncorhynchus mykiss) or…

Have you ever wondered if there’s a skincare ingredient that’s powerful enough to kill bacteria but gentle enough to spray directly onto a sensitive skin? It sounds too good to be true, but it actually exists. Let me introduce you to your skin’s new best friend: Hypochlorous Acid (HOCl). While…

Have you ever looked at a skincare product and thought,“Wow, it has all the trending ingredients!” As a cosmetic chemist, that’s often the exact moment I don’t buy it. While products can look impressive in advertisements, there are certain red flags in formulation and packaging. In this post, I’ll share…

“Contains two types of Hyaluronic Acid!”  You’ve likely seen this marketing claim on countless serum bottles. But as a cosmetic chemist, I often see consumers confused by the terminology. Does a smaller molecule always mean better results? And what is that “Sodium Hyaluronate” listed on the back of your bottle—is…

“This product is safe because it’s Clean Beauty.”  As a cosmetic chemist, this is perhaps the phrase I hear most often—and the one that causes me the most internal conflict. In the aisles of Sephora or Ulta, “Clean” has become synonymous with “Safe.” But from a formulator’s perspective, the line…

A Day in the Life of a Cosmetic Formulation Scientist When people hear “cosmetic scientist,” they often imagine someone mixing pretty creams all day. What does a cosmetic scientist do? In reality, the job of a cosmetic R&D scientist is a balance of science, problem-solving, communication, and documentation. Here’s what…

Ingredient-Level Causes of Pilling: A Formulation Perspective Have you ever applied your skincare or makeup, only to see tiny rolls or flakes forming on your face? This frustrating phenomenon is commonly known as pilling. It can ruin the finish of your makeup and make your entire routine feel pointless. Why…

Retinoids are vitamin A derivatives and are considered one of the most effective ingredients in skincare. Common types of retinoids include retinyl palmitate, retinol, retinal (retinaldehyde), and retinoic acid. Each form differs in strength, skin tolerance, and how it functions on the skin. Why Retinoids Are So Popular The key…

If you’re a fan of Trader Joe’s, you’ve probably heard about the infamous “TJ’s dupes”—Trader Joe’s products that are inspired by popular, well-known items from other brands, often at a lower price and with easier accessibility. But the big question is: Are they actually worth buying? In this post, I’m…

Silicones have become one of the most misunderstood ingredient groups in skincare. Often labeled as “synthetic,” “pore-clogging,” or “bad for the skin,” they are frequently avoided based on assumptions rather than science. In reality, silicones have been used safely in cosmetic formulations for decades and play an important role in…