Skin care that shows its numbers.
Six single-job serums, simple moisturisers and a daily SPF. Every strength printed on the front, every ingredient listed in full, nothing scented.
Niacinamide 10% + Zinc 1%
Strength on the front
Niacinamide 10%, not “with niacinamide”. You always know the dose.
Short, readable lists
Most formulas have under 12 ingredients, each one explained.
Patch-test guide
A printed card in every box shows how to test before first use.
Fragrance-free, always
No perfume, no essential oils, no colour added to the formula.
Six shelves. Nothing extra.
Open the label. Read it like a lab report.
Pick a serum to see the dose of every active, the pH, and the complete ingredient list.
Niacinamide 10% + Zinc 1%
Aqua, Niacinamide, Propanediol, Glycerin, Zinc PCA, Pentylene Glycol, Sodium Hyaluronate, Xanthan Gum, Sodium Benzoate, Potassium Sorbate.
Start every other day for two weeks. Patch test behind the ear for 24 hours first.
Hyaluronic Acid 2% + B5
Aqua, Glycerin, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Panthenol, Allantoin, Propanediol, Xanthan Gum, Sodium Benzoate, Potassium Sorbate.
Apply to slightly damp skin, then seal with a moisturiser.
Vitamin C 15% Antioxidant
Aqua, Ethyl Ascorbic Acid, Propanediol, Glycerin, Ferulic Acid, Tocopherol, Sodium Hyaluronate, Xanthan Gum, Phenoxyethanol.
Mild tingling can happen on first uses. Always follow with SPF in the morning.
Four steps, picked for your skin.
Choose your skin type. We list the four products, in order, with the set price.
Tight, flaky, comfort-first
Creamy Milk Cleanser
Hyaluronic Acid 2% + B5
Barrier Cream with Ceramides
Daily SPF 50 Fluid
Cleanse, treat and moisturise morning and night. Add SPF in the morning only. Free shipping over $60.
Shop the dry setShiny by noon, enlarged pores
Soft Gel Cleanser
Niacinamide 10% + Zinc 1%
Light Gel Moisturiser
Daily SPF 50 Fluid
Cleanse, treat and moisturise morning and night. Add SPF in the morning only. Free shipping over $60.
Shop the oily setOily T-zone, drier cheeks
Soft Gel Cleanser
Vitamin C 15% Antioxidant
Light Gel Moisturiser
Daily SPF 50 Fluid
Cleanse, treat and moisturise morning and night. Add SPF in the morning only. Free shipping over $60.
Shop the combination setReacts easily, keep it simple
Creamy Milk Cleanser
Hyaluronic Acid 2% + B5
Barrier Cream with Ceramides
Mineral SPF 30
Cleanse, treat and moisturise morning and night. Add SPF in the morning only. Free shipping over $60.
Shop the sensitive set
The last step, every morning.
Sunscreen goes on after moisturiser and before makeup. Ours is one fluid, no white cast, no scent.
Squeeze a line along your index and middle fingers. That covers face and neck.
UVA and UVB filters, tested to SPF 50.
Lightweight fluid made to sit under makeup.
Every two hours in strong sun, and after swimming.
Sample reviews from sample customers.
Demo store text. Replace with your own verified reviews.
I could finally see what was in the bottle and how much. Ten percent niacinamide, no perfume, and my T-zone calmed down by week three.
Amara O., London
Combination skin · NiacinamideThe patch-test card made me careful, and the barrier cream never stung. Short ingredient list, easy to trust.
Kenji M., Seattle
Dry, sensitive · Barrier CreamThe SPF sits under makeup and leaves no white cast on my brown skin. Bought a second bottle.
Priya S., Toronto
Oily · SPF 50Plain answers before you buy.
Are the formulas free of fragrance?
Yes. No perfume, no essential oils and no added colour in any Assay product.
Can I use the serums together?
Most pairs work. A simple order: thinnest first, moisturiser after, SPF last. Use Vitamin C in the morning and keep new actives to one at a time.
How long until I see a difference?
Skin changes slowly. Give a new product four to six weeks of regular use before judging it. Results vary from person to person.
Is it suitable for pregnancy or a skin condition?
Our products are cosmetics, not treatments. If you are pregnant, nursing or managing a skin condition, ask your doctor before adding a new active such as retinol.
What is your returns policy?
Free returns within 30 days, even if opened. If a product does not suit your skin, we refund it.
Do you ship worldwide?
Yes. Free tracked shipping over $60, otherwise $5 in the US and $12 worldwide. Orders leave in two working days.
Test first. Always.
Behind the ear
Dab a pea-sized amount on clean skin behind one ear.
Wait 24 hours
Leave it and do not wash the spot. Watch for redness, itching or swelling.
All clear? Go
Start every other day, then build up. Stop and see a doctor if you react.
One serum. Four steps. Full label.
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