All Skincare Haircare Cosmetics Ingredient Index
Skincare Active Ingredient Guide

What Is Mandelic Acid and What Does It Do?

Mandelic acid is the gentlest AHA — it has the largest molecular structure of all alpha hydroxy acids, which means it penetrates slowly and irritates less.

Skincare Ingredient Guide

What Is Allantoin and How Is It Used in Skin Care?

Allantoin is FDA-recognized as a skin protectant. It soothes irritation, supports hydration, and helps skin heal — and it shows up in everything from moisturizers to lip balms to diaper creams.

Skincare Active Ingredient Guide

Copper Peptide (GHK-Cu) for Skin: How It Works and Why It Declines With Age

Copper peptide is a molecule your body makes naturally. Here's how it works, how it compares to other anti-aging actives, and why pH matters when combining it with acids.

Skincare Treatment Guide

Hypochlorous Acid Spray: What It Actually Does for Skin

Your body makes it naturally. It's dermatologist-backed for post-procedure care, but is it a miracle treatment or just a supporting player?

Skincare Active Ingredient Guide

What Does Glycolic Acid Do for Skin? A Complete Guide

Glycolic acid is the smallest AHA. Here's what it does, concentration guide, and how it compares to salicylic acid for your skin type.

Skincare Treatment Guide

Eye Cream for Dark Circles: How to Pick One That Actually Matches Your Cause

Dark circles aren't one problem — they're 3 types. Pigmented, vascular, or structural. Here's how to identify yours and pick the right ingredients.

Haircare Treatment Guide

Rosemary Oil for Hair Growth: What Actually Works (and What Doesn't)

Does rosemary oil actually grow hair? It performs comparably to minoxidil in research — but only if you dilute it, massage it in, and stick with it for months.

Skincare Active Ingredient Guide

What Does Salicylic Acid Do for Skin? A Complete Breakdown

Salicylic acid gets inside your pores instead of just cleaning the surface. Here's how BHA works, which formats actually work best, and how to use it without irritation.

Haircare & Skincare Ingredient Guide

What Is SLS (Sodium Lauryl Sulfate), and Should You Be Worried About It?

That foam in your shampoo has a name: SLS. Half the internet swears it's harmful, the other half says it's safe. Here's what the research actually shows.

Skincare Ingredient Guide

What Does Hyaluronic Acid Actually Do for Your Skin?

Hyaluronic acid can hold over a thousand times its own weight in water. But molecular weight matters, and so does how you use it — here's what actually works.

Skincare & Haircare Ingredient Guide

What Glycerin Actually Does in Your Skincare, Hair Care, and Toothpaste

Glycerin shows up in moisturizers, shampoos, toothpaste, and even deodorant. But what's it actually doing in each one? A plain-language breakdown of this humectant and why it's everywhere.

Publishing soon

More ingredient breakdowns coming.

We're working on guides to sulfates, silicones, parabens, and fragrance. Subscribe below and we'll notify you the moment they go live.

What we're writing next

The ingredient index we're building.

A preview of the categories and questions our first wave of articles will answer in plain language.

Skincare

Sulfates & surfactants

What SLS and SLES actually do in a cleanser, and when foaming agents cross into irritation territory.

Skincare

Preservatives, decoded

Parabens, phenoxyethanol and the tradeoff between shelf-stable products and preservative sensitivity.

Haircare

Silicones in conditioner

Why silicones make hair feel smooth instantly, and what "buildup" actually means chemically.

Haircare

Sulfate-free, explained

What changes in a formula when sulfates are removed — and whether it's better for your scalp.

Cosmetics

Fragrance & "parfum"

Why a single word can legally hide dozens of undisclosed chemical compounds.

Cosmetics

Pigments & heavy metals

How color cosmetics are pigmented, and where trace contaminants can enter the supply chain.

Questions

Frequently asked.

Why doesn't Stryppd have blog posts yet?

Stryppd is a new publication. We're researching and writing our first ingredient breakdowns now so that every article meets our sourcing standard before it goes live. Subscribe above to be notified the moment the first guides publish.

What topics will Stryppd cover?

Skincare, haircare and color cosmetics — breaking down individual ingredients such as sulfates, silicones, parabens, fragrance blends and preservatives in plain language, including their function, common sourcing and the safety evidence behind them.

Is Stryppd sponsored by any beauty brand?

No. Our ingredient research is not sponsored by personal care brands. The site may earn affiliate commissions on some product links in the future, which will always be disclosed, but sponsorship never influences how an ingredient is evaluated.

Will Stryppd ever sell its own products?

Yes — eventually. Once we've built a track record of honest ingredient education, we plan to formulate our own personal care line with the same transparency standard we hold other brands to.

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