The Klyva Blog

Honest, science-based writing on skincare ingredients and labels — so you can read a product for yourself.

Glycerin: The Most Underrated Ingredient in Skincare

It is in almost everything and almost never advertised. Glycerin might be the most quietly effective ingredient on your shelf.

Salicylic acid is the go-to for blackheads and breakouts. Here is why it works where other exfoliants do not.

Niacinamide rarely gets the spotlight, but it is one of the most well-tolerated and useful ingredients in skincare.

Two vitamin C serums can behave completely differently. The reason is on the ingredient list.

Hyaluronic acid is a hydration staple, but how you use it decides whether it helps or backfires.

Retinol is one of the few anti-aging ingredients with real evidence behind it. It is also one of the easiest to misuse.

Few ingredients have a worse reputation than parabens. Here is where that reputation came from, and what the evidence actually says.

Alcohol-free sounds reassuring, but some of the alcohols in skincare are moisturizing. The name on the label is what matters.

Phenoxyethanol shows up in a huge share of skincare. Here is what it actually is, and what the safety science says.

One word on a label can hide dozens of ingredients. Here is what Fragrance really means for your skin.