Skincare Ingredients Explained

Explore these guides

Showing 1–12 of 25 articles

Browse topics

Woman comparing cream textures and plain moisturiser jars at a table.

Glycerin vs Hyaluronic Acid: Which Hydrator Does Your Skin Need?

Glycerin and hyaluronic acid are useful humectants. The better choice depends on the complete moisturizer, not the trendiest ingredient name.

Woman comparing two plain amber skincare bottles at a walnut table

Ingredients

Retinal vs Retinol: Which Vitamin A Fits Your Routine?

Ingredients / Carolina Menezes

Retinal is one conversion step closer to retinoic acid, but the best choice still depends on the exact formula, your tolerance and a routine you can sustain.

Woman comparing two skincare active cards beside a serum bottle and tube in overcast window light

Ingredients

Azelaic Acid vs Vitamin C for Dark Spots: Which Fits Your Routine?

Ingredients / Carolina Menezes

Compare azelaic acid vs vitamin C for dark spots, post-acne marks, formula differences, tolerability and routine fit.

An unbranded cream tube and amber bottle beside Morning and Evening cards under a reading lamp

Ingredients

Azelaic Acid and Niacinamide: Can You Use Them Together?

Ingredients / Carolina Menezes

Can you use azelaic acid and niacinamide together? Check product directions, compare routine options and decide whether you need both.

A water bowl and closed ceramic jar on walnut beside handwritten Hydration and Barrier cards

Ingredients

Ceramides vs Hyaluronic Acid: Do You Need Both?

Ingredients / Carolina Menezes

Compare ceramides and hyaluronic acid, understand their different roles, and decide whether one moisturiser can cover your routine.

Aesthetic still-life of a small glass jar of pale homemade tallow balm open on a warm marble kitchen counter beside a folded linen cloth and a stoneware cup, in soft warm morning light

Ingredients

Beef Tallow for Skin: What the Evidence Shows

Ingredients / Carolina Menezes

What does research show about beef tallow for skin? Explore the limited human evidence, uncertain breakout risk, and practical moisturising alternatives.

Editorial three-quarter portrait of a Japanese-Peruvian woman in her mid 30s kneeling at a low walnut Japanese-inspired table in a Portland K-beauty home in soft warm morning light pouring pale green matcha from a small unglazed ceramic teapot into a small matching tea cup with a small frosted-glass bottle of snail mucin essence standing prominently on the tray beside her glass-skin sheen visible on her cheek

Ingredients

Snail Mucin for Women 30+: What It Does and How to Use It

Ingredients / Carolina Menezes

Snail mucin for women 30+: how glycoproteins, peptides, and glycolic acid work together in this K-beauty ingredient, plus how to layer it for barrier repair.

Editorial three-quarter portrait of a Milanese-Italian woman in her mid 40s lying on her side in warm cream linen sheets in a Roman hotel bedroom at night with eyes softly closed post-routine her cheek freshly luminous with just-applied retinal serum a small amber dropper bottle standing open on the walnut nightstand behind her in warm bedside lamp light with a paperback novel open face-down beside a nearly-empty glass of red wine

Ingredients

Retinol After 40: Compare Strengths, Formulas and Tolerance

Ingredients / Carolina Menezes

Compare retinol and retinal options after 40. Learn why comfort, product directions and your existing routine matter more than automatic strength upgrades.

Editorial three-quarter portrait of a Swedish-American woman in her early 40s standing on the weathered grey shingle porch of a Maine coastal home in soft warm golden hour light with a small teak side table holding morning skincare a stoneware coffee mug and a folded copy of the New York Times against the deep blue Atlantic bay in the soft-focus background

Ingredients

Collagen Loss After 40: Ingredients, Evidence and Routine Options

Ingredients / Carolina Menezes

Compare retinoids, peptides, vitamin C, PDRN and ceramides. Understand their different roles, evidence limits and compatibility before adding more products.

Editorial three-quarter portrait of a Moroccan-French woman in her early 40s seated in a leather reading chair in her book-lined home library in soft warm morning light pressing pale golden vitamin C serum into her cheekbone with a small amber peptide dropper waiting on the round marble side table beside a stack of books and a small cup of tea against warm walnut bookshelves

Ingredients

Vitamin C and Peptides Layering for Women 30+: The Order That Works

Ingredients / Carolina Menezes

Can you use vitamin C and peptides together? Check formula-specific compatibility, copper peptide restrictions, separate routines and realistic expectations.

Editorial three-quarter portrait of a Japanese-Brazilian woman in her late 30s sitting on the edge of her linen-dressed bed at night in soft warm tungsten bedside lamp light applying a final occlusive layer with a small ceramic tub of petroleum jelly visible on the nightstand against a shadowed deep olive wall

Ingredients

SPF Myths: Sunscreen Labels, Application and Buying Choices

Ingredients / Carolina Menezes

Understand sunscreen labels and common SPF misconceptions, then compare product formats around comfort, application and sun-protective habits.

Editorial three-quarter portrait of a Korean-Chilean woman in her early 40s at her vanity holding a small pale-pink frosted dropper bottle of PDRN serum in soft warm morning window light against a deep olive wall with real skin texture preserved

Ingredients

PDRN Skincare for Women 30+: What Salmon DNA Actually Does for Your Skin

Ingredients / Carolina Menezes

Explore PDRN skincare, how it differs from peptides, the limits of current research, and curated product and companion options for women after 30 and 40.