Learn how long skincare products really last, what the PAO symbol means, and how to store your skincare properly to keep formulas safe, stable, and effective. From Vitamin C and retinoids to cleansing balms and eye creams, this complete guide explains what causes products to expire, when a skincare fridge helps (and when it doesn’t), plus the warning signs a product has gone off.

PDRN and exosomes are two next-generation regenerative skincare ingredients that work in different but complementary ways. PDRN helps stimulate the skin’s own collagen and hyaluronic acid production, while exosomes support broad cellular renewal and repair. Together, INKEY’s vegan PDRN Serum and Exosome Glow Serum help improve glow, hydration, firmness, and overall skin renewal.

“Salmon sperm serum” may sound like a viral skincare gimmick, but the science behind it is surprisingly credible. Known as PDRN, this clinically studied ingredient helps support collagen production, hydration, and skin renewal at a cellular level. In this guide, we break down what PDRN actually is, how it works, and why INKEY’s vegan PDRN Serum delivers all the benefits - without the salmon.

Ceramides make up 50% of your skin’s natural barrier — but not all ceramides work in the same way. With the rise of bio-active technology, understanding the difference between traditional and bio-active ceramides can be the key to unlocking stronger, smoother, more resilient skin.

In this guide, we break down the science behind ceramides, from the essential role they play in preventing moisture loss to how different types target concerns like dryness, sensitivity and fine lines. You’ll discover how bio-active ceramides enhance penetration and accelerate visible results compared to conventional formulations — and how to choose the right ceramide product for your skin type.

Introducing INKEY Lab's latest drop - Exosome Boosting Mask. A next-generation biodegradable dry sheet mask designed to deliver instant glow, hydration and supports the skin’s natural repair processes. Powered by exosome-boosting technology, it helps enhance ingredient delivery for deeper hydration, strengthens the skin barrier, and leaves skin looking smoother, plumper and more radiant in just 10 minutes. 

Not as well-known as Hyaluronic Acid, Polyglutamic Acid ("PGA"), is believed to have 4x greater moisture retaining benefits than HA. If you have dull, dry, or dehydrated skin, you should consider incorporating Polyglutamic Acid into your skincare recipe. 

Collagen within skincare has been a talking point within the beauty industry as a whole. But what does collagen actually do, and how can you include it in your regimen?

When it comes to anti-ageing, peptides are a powerful ingredient that you may have heard of, but what are they? Peptides, also known as polypeptides, are amino acids which form proteins in the skin. Find out more about Peptides, how they can be beneficial in your skincare routine and what INKEY List products contain this super ingredient.

It’s a term often connected to ingredients like collagen and peptides but what is ‘plump’ skin and why do we want it? Plump skin can be regarded as well-hydrated, firm with a natural fullness, roundness and bounciness. Its decline can be considered a sign of ageing and can also affect the brightness, texture and tone. Learn more about how to get plump skin, the best INKEY List products to support the production of elastin and collagen whilst giving hydration and other tips to help plump your skin.