Science-Backed Beauty

The Skinwich Journal

Deep dives into ingredients, routines, and skincare science. Every article is rooted in peer-reviewed research and written to help you make better choices for your skin.

Ingredient ScienceFeatured

Niacinamide: The One Ingredient Almost Every Skin Type Needs

Niacinamide is one of the most researched, most versatile, and most misunderstood ingredients in modern skincare. Here's what the clinical evidence actually says.

8 min read·Dr. Lena Park, Cosmetic Chemist·October 12, 2025

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Ingredient

8 min read

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Routine Advice

Starting Retinol Without Destroying Your Skin Barrier

Retinol is the gold standard of anti-ageing. It's also the ingredient most people misuse. Here's how to introduce it without the dreaded retinol purge spiral.

10 min readRead More

Ingredient Science

Chemical vs Mineral SPF: An Honest, Science-Based Comparison

The SPF debate generates more misinformation per square inch than almost any other skincare topic. Here's what dermatologists and photobiologists actually agree on.

7 min readRead More

Special Concerns

Building a Pregnancy-Safe Skincare Routine That Actually Works

Pregnancy changes everything — including what you can safely put on your skin. Here's a dermatologist-reviewed framework for maintaining effective skincare while protecting your baby.

9 min readRead More

Ingredient Science

Ceramides: The Barrier Ingredient That Changes Everything

Your skin barrier is mostly ceramides. Understanding how they work — and why barrier damage underlies almost every chronic skin concern — changes how you build your routine.

6 min readRead More

Routine Advice

The Definitive Guide to Morning Skincare Layering Order

Apply products in the wrong order and you're potentially neutralising ingredients or blocking absorption. Here's the science-backed sequence for every morning routine type.

5 min readRead More

Ingredient Science

8 Ingredient Combinations You Should Never Use on the Same Night

Some skincare pairings don't just underperform — they actively work against each other or irritate skin. Here's the chemistry behind the most problematic combinations, and what to do instead.

11 min readRead More

Routine Advice

Your Skin in Your 30s: The Routine Shifts That Actually Matter

Your 30s aren't a skincare emergency — but they are a pivot point. Here's what's actually changing in your skin and the targeted adjustments that make a real difference.

9 min readRead More

Ingredient Science

Comedogenic Ratings Explained: Why Your 'Clean' Moisturizer Might Be Breaking You Out

That luxurious moisturiser with 'natural' ingredients might be the reason you're still breaking out. Here's what comedogenic ratings actually mean — and their important limitations.

8 min readRead More

Ingredient Deep Dive

Peptides in Skincare: What They Actually Do (And Which Ones Work)

Peptides are one of skincare's most over-marketed categories — but beneath the hype, there's real science. Here's an honest breakdown of what peptides are, how they work, and which ones have actual evidence.

10 min readRead More

Ingredient Science

I'm a Cosmetic Chemist. Here's How I Actually Read an Ingredient List.

The ingredient list on your skincare product tells you almost everything — if you know how to read it. Here's the framework a cosmetic chemist actually uses.

9 min readRead More

The Skinwich Edit

Weekly ingredient deep-dives, routine tips, and product discoveries — backed by science, delivered with clarity.