Blog topic

Ingredients

Plain-English guides to the ingredients in modern skincare, starting with vitamin C: what each one does, what the research shows and how to use it well.

Our ingredient guides explain what's actually in your skincare, what each ingredient does and what the research does and doesn't show. We start with vitamin C, the ingredient behind every Gleamin formula, and cover both the stable forms made in the lab and the vitamin C-rich fruits we source from Australia.

Every guide is written to be clear and honest. We cite real studies, separate lab research from results on skin, and say so when the evidence is thin.

What you'll find here

The forms of vitamin C. How sodium ascorbyl phosphate, 3-O-ethyl ascorbic acid and tetrahexyldecyl ascorbate differ, and which texture each one suits.
How vitamin C works on uneven tone. Start with Vitamin C for Dark Spots and Hyperpigmentation.
Botanicals and clays. What Is Gleam C? explains our Kakadu plum and desert lime blend, and Kakadu Plum for Skin goes deeper on the fruit.
Buying guides, such as how to choose a vitamin C serum and why your skincare might not be working yet.

13 articles

Kakadu plums and desert limes, some halved, on cream linen beside a dish of pale-golden clay

IngredientsSeptember 24, 2026

What Is Gleam C? Our Kakadu Plum Vitamin C Blend

Gleam C is Gleamin's vitamin C blend of Kakadu plum and desert lime from Australia. What's in it, how it compares with lab-made vitamin C, and which products use it.

By Gleamin TeamRead article

A cut aloe vera leaf with clear gel beading at the edge, next to a small dish of pale-yellow clay

IngredientsSeptember 22, 2026

Aloe Vera in a Clay Mask: Why It Keeps Skin Comfortable

Aloe vera is the quiet balancer in our Vitamin C Clay Mask. What aloe leaf juice is, what the research says about hydration, and why clay needs it.

By Gleamin Team

Halved finger limes spilling glistening green and pink caviar-like pearls onto a cream plate

IngredientsSeptember 20, 2026

Finger Lime in Skincare: What "Citrus Caviar" Brings

Finger lime is the Australian rainforest citrus with caviar-like pearls inside. What it is, what's known about it for skin, and why it's in our Vitamin C Clay Mask.

By Gleamin Team

A sprig of small round desert limes with grey-green leaves, some halved, on warm sand-colored stone

IngredientsSeptember 16, 2026

Desert Lime for Skin: Australia's Hardy Wild Citrus

Desert lime is a tough little citrus from inland Australia. What it is, what the research does and doesn't show for skin, and why it's in our Vitamin C Clay Mask.

By Gleamin Team

Fresh turmeric roots, one sliced to show orange flesh, next to a small bowl of golden-yellow clay

IngredientsSeptember 14, 2026

Turmeric for Skin: The Research and Why It's in Our Mask

Turmeric has gone from spice rack to skincare shelf. What curcumin is, what the research on skin really shows, and how turmeric works in our Vitamin C Clay Mask.

By Gleamin Team

A mound of fine white kaolin clay powder with a small wooden scoop on a pale stone slab in warm light

IngredientsSeptember 12, 2026

Kaolin Clay for Skin: What It Does in a Face Mask

Kaolin is the gentlest of the classic cosmetic clays. What it is, how it absorbs oil, what the research says, and why it's the first clay in our Vitamin C Clay Mask.

By Gleamin Team

Small pale-green Kakadu plums, some halved, on cream linen against a soft butter-yellow background

IngredientsSeptember 10, 2026

Kakadu Plum for Skin: The Vitamin C Fruit in Our Clay Mask

What Kakadu plum is, why it's famous for vitamin C, what the research really shows for skin, and why it's one of three Australian fruits in our Vitamin C Clay Mask.

By Gleamin Team

A woman with medium-deep brown skin reading a notebook at a cream table beside a yellow ceramic cup

IngredientsAugust 22, 2025

Why Your Skincare Isn't Working (and It's Not Your Fault)

Why a serum that works for your friend does nothing for you: research gaps, skin differences, irritation, time and sunlight, plus the questions to ask before you buy.

By Gleamin Team

Three swatches of clear and pale-yellow gel beside a lemon slice on a cream background

IngredientsFebruary 27, 2024

3-O-Ethyl Ascorbic Acid: The Vitamin C That Stays Stable

3-O-ethyl ascorbic acid keeps vitamin C's brightening benefits without the instability. How it works, how it compares, and how to use a 3-O-ethyl serum.

By Gleamin Team

Clear serum droplets on a sheet of glass against a bright yellow background in sunlight

IngredientsFebruary 27, 2024

Sodium Ascorbyl Phosphate (SAP): The Gentle, Stable Vitamin C

What sodium ascorbyl phosphate is, how your skin turns it into vitamin C, how it helps uneven tone and breakout-prone skin, and how to use a SAP serum.

By Gleamin Team

Round golden drops of facial oil on glass against a bright yellow background in sunlight

IngredientsFebruary 27, 2024

Tetrahexyldecyl Ascorbate (THD): The Oil-Soluble Vitamin C

THD is the gentle, oil-soluble vitamin C that works in creams and oils. What it is, what the research says, how it compares and how to use it.

By Gleamin Team

Halved oranges, citrus slices and small green Kakadu plums on a bright yellow background in strong sunlight

IngredientsFebruary 27, 2024

Vitamin C for Dark Spots and Hyperpigmentation: How It Works

How vitamin C works on hyperpigmentation, which forms stay stable, how to use it step by step with sunscreen, and what to expect over 8 to 12 weeks.

By Gleamin Team

Clear and golden serum droplets on glass beside halved oranges and green Kakadu plums on a warm yellow background

IngredientsFebruary 27, 2024

How to Choose a Vitamin C Serum (and Use It Well)

A buyer's guide to vitamin C serum: which form of vitamin C, what strength, what packaging and texture to look for, what to pair it with, and how to use it every day.

By Gleamin Team

The new Gleamin

Be first to know

Get founding-member early access to the new Gleamin. One email when it's ready, no spam.

By joining you agree to receive launch updates from Gleamin. Unsubscribe any time.