The 90-Day Challenge

90 days to a
younger looking you.

Three steps, twice a day, for ninety days — the most powerful anti-aging system we know how to make without a prescription. Take the first 60 days to decide it is not working and we refund every cent, opened bottles included.

Four aging pathways, one systemCollagen loss, pigment, oxidation and barrier breakdown.

Prescription strength, no prescriptionPharmaceutical-grade actives at clinically studied concentrations.

See what is in it

60-day money-back guaranteeFree shippingCancel any time

14,200

Members taking the challenge

Clinical studies running

1.4M

Formulations modelled

94%

Report visible change

The challenge

Ninety days.
Then you judge.

Most people quit skincare at week three, which is the exact point where nothing structural has happened yet. Surface texture moves in a fortnight and tone at about a month, but the change you actually want — firmness, contour, lines with less depth — waits on dermal collagen completing a full remodelling cycle. That takes ninety days.

So we set the challenge at ninety days, and we ship exactly that much: one box, one full cycle, nothing to reorder halfway through. Use it twice a day, photograph the start and the finish, and let the comparison settle it.

Your risk in taking it is zero. The money-back guarantee runs 60 days — well past the point where tone and firmness have started to show — and it covers opened bottles with nothing to send back.

Photograph day zero

Before your first wash, take a photo in daylight without makeup. It takes ten seconds and it is the only honest way to judge what happens next — skin changes too slowly for memory to be a fair witness.

Two minutes, twice a day

Cleanse, treat, moisturize. Morning and night, for 90 days. One shipment covers the whole challenge, so there is nothing to reorder and nothing to think about.

Judge it at day 90

Same light, same angle, new photo. By then dermal collagen has completed a full remodelling cycle. If you are not looking at a younger face, you have already had your money back.

Who makes it

A lab funded
by its members

We are an anti-aging lab that works on one thing: skin. Not a marketing company that licensed a formula and printed a carton. Every active in this program was selected by our models, formulated in-house, reviewed by a board-certified dermatologist and tested before it went in a box.

Members fund that work directly. We sell one program, at one price, with no wholesaler and no retailer in between — which is why a $290 membership can carry twelve actives at concentrations that normally live behind a prescription pad, and still pay for the next study.

These are cosmetic products. They change how skin looks. We do not claim they treat or cure anything, and we publish the full ingredient list for every one of them.

More about the lab

The program

Three steps.
Ninety days of supply.

Each step is dosed on the assumption the other two are in use, which is why the program is sold complete and never in parts. Two minutes in the morning, two at night, and one box carries the whole challenge.

Step 1

Cleanse

Where the 90 days start. It clears the day off your skin without stripping the barrier that keeps it looking plump, and leaves the surface clean enough that Step 2 reaches live tissue instead of dead cells. Skin looks brighter from the first wash.

Ahnfeltiopsis Concinna (Red Algae) ExtractRich in antioxidants. Hydrates deeply and improves firmness, softening the look of fine lines.

Hydrolyzed Algin · Algae peptidesEnhances hydration, improves texture and supports collagen production.

Sodium Cocoyl Wheat Amino Acids · Cocamidopropyl BetaineGentle surfactants that lift impurities without stripping natural oils, preserving the protective barrier.

GlycerinDraws moisture into the skin to plump and smooth.

Anthemis Nobilis (Chamomile) · Zingiber Officinale (Ginger) OilCalm and balance the skin through cleansing.

How to useGently massage a small amount onto damp face and neck twice daily. Leave on for 30 seconds. Rinse thoroughly with tepid water. Follow with the treatment serum.

Full ingredient list

Water (Aqua), Sodium Cocoyl Wheat Amino Acids, Cocamidopropyl Betaine, Glycerin, Hydroxypropyl Guar, Ahnfeltiopsis Concinna (Red Algae) Extract, Hydrolyzed Algin, Anthemis Nobilis (Chamomile) Flower Oil, Zingiber Officinale (Ginger) Oil, Phenoxyethanol.

Step 2

Treat

The engine of the program, and where most of the money goes. Stable vitamin C, lilac stem cells and marine actives work on the two things that age a face fastest: dark spots and lost firmness. This is the step that changes what people notice about your skin.

Tetrahexyldecyl AscorbateStable, oil-soluble vitamin C. Brightens, fades hyperpigmentation and drives collagen synthesis. Holds up in formulation far better than L-ascorbic acid.

Syringa Vulgaris (Lilac) Leaf Cell Culture ExtractLilac stem cells. Reduce inflammation and even skin texture with repeated use.

Alaria Esculenta · Undaria Pinnatifida Algae ExtractsMarine algae extracts supporting firmness and elasticity.

Sodium HyaluronateLow molecular weight, so it hydrates below the surface rather than resting on it.

Tocopheryl AcetateVitamin E. Works alongside vitamin C to protect against oxidative damage.

BisabololSoothes, offsetting the irritation active vitamin C can cause.

How to useAfter cleansing, apply to the face and neck twice daily. Follow with the moisturizer.

Full ingredient list

Water (Aqua), Glycerin, Tetrahexyldecyl Ascorbate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Syringa Vulgaris (Lilac) Leaf Cell Culture Extract, Alaria Esculenta (Algae) Extract, Undaria Pinnatifida (Algae) Extract, Tocopheryl Acetate, Sodium Hyaluronate, Hydrogenated Lecithin, Phospholipids, Helianthus Annuus (Sunflower) Seed Oil, Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Limon (Lemon) Peel Oil, Bisabolol, Caprylic/Capric Triglyceride, Caprylyl Glycol, Cyclopentasiloxane, Dimethicone, Maltodextrin, Phenoxyethanol, Microcrystalline Cellulose, Cellulose Gum, Hexylene Glycol, Sodium Acrylates Copolymer, Hydrogenated Polydecene, Polyglyceryl-10 Stearate.

Step 3

Moisturize

The finisher, and the step that carries the firming work. A peptide that tells your skin to make more collagen and elastin, an antioxidant that covers free radicals most formulas miss, and a seal that keeps Step 2 on your face instead of evaporating off it.

Dimethylmethoxy ChromanolLipochroman. Neutralises all four major free radical species, including the reactive nitrogen and carbon radicals most antioxidants leave alone.

Dimethylmethoxy Chromanyl PalmitateChromabright. Reduces uneven pigmentation and UV-induced darkening without the irritation associated with hydroquinone.

Tetrapeptide-21Firming peptide. Signals fibroblasts to increase collagen and elastin output.

Pseudoalteromonas Ferment ExtractMarine ferment that improves elasticity and holds hydration in the dermis.

Simmondsia Chinensis (Jojoba) Seed OilThe barrier lipid closest in structure to the skin’s own sebum.

Chamomile · Geranium · Lavender OilsCalm the skin and finish the formula.

How to useAfter the treatment serum, apply to face and neck twice daily. Follow with SPF in the morning.

Full ingredient list

Water (Aqua), Caprylic/Capric Triglyceride, Simmondsia Chinensis (Jojoba) Seed Oil, Cetearyl Alcohol, Glycerin, Dimethicone, Cetearyl Glucoside, Dimethylmethoxy Chromanyl Palmitate, Dimethylmethoxy Chromanol, Tetrapeptide-21, Pseudoalteromonas Ferment Extract, Alanine, Proline, Serine, Xanthan Gum, Potassium Cetyl Phosphate, Carbomer, Caprylyl Glycol, Hexylene Glycol, Butylene Glycol, Sodium Hydroxide, Sodium Phosphate, Anthemis Nobilis (Chamomile) Flower Oil, Pelargonium Graveolens (Geranium) Flower Oil, Lavandula Angustifolia (Lavender) Oil, Phenoxyethanol, Ethylhexylglycerin.

Results

Where the years
actually show

Aging does not arrive evenly across a face. Each marker below is a place it shows first, what the program is doing there, and which actives are responsible for it.

Forehead

Expression lines

Repeated movement etches lines into collagen that is already thinning. Tetrapeptide-21 signals fibroblasts to increase collagen and elastin output, so the tissue beneath those lines rebuilds and they lose depth — the face still moves, it just stops keeping a record of it.

Actives responsible

Tetrapeptide-21
Sodium Hyaluronate

Day 14SurfaceCell turnover lifts. Texture smooths and skin starts catching the light again.
Day 30ToneOne full turnover completes. Dark spots and uneven tone start to lift.
Day 60FirmnessCollagen and elastin synthesis reaches the surface. Fine lines lose depth.
Day 90The resultDermal collagen completes a full cycle. Challenge over — compare your photos.

Actives

Twelve actives, one job:
make you look younger

This is the whole argument for the program. Nothing is here to round out a label — every active below earns its place against one of the four things that age a face, and the full INCI is printed on every carton.

Tetrahexyldecyl Ascorbate

Vitamin C ester

The brightener. Fades the dark spots and dullness that read as age, and drives the collagen synthesis that keeps skin looking firm. Oil-soluble, so it survives in the bottle far better than L-ascorbic acid.

Step 2

Dimethylmethoxy Chromanol

Lipochroman

The defender. Neutralises all four major free radical species — including the reactive nitrogen and carbon radicals most antioxidants leave alone — so the collagen you already have breaks down more slowly.

Step 3

Dimethylmethoxy Chromanyl Palmitate

Chromabright

The spot fader. Reduces uneven pigmentation and UV-induced darkening, studied as an alternative to hydroquinone without the irritation. Even tone is one of the strongest signals of a younger face.

Step 3

Tetrapeptide-21

Firming peptide

The lifter. Signals fibroblasts to increase collagen and elastin output — the two proteins whose loss shows up as slackness along the jaw and cheek.

Step 3

Syringa Vulgaris Leaf Cell Culture

Lilac stem cell extract

The smoother. Calms inflammation and evens texture with repeated use, so light falls evenly across skin instead of catching on it.

Step 2

Ahnfeltiopsis Concinna Extract

Hawaiian red algae

The plumper. Antioxidant-rich and deeply hydrating, it softens the look of fine lines from the first fortnight of the challenge.

Step 1

Alaria Esculenta · Undaria Pinnatifida

Marine algae extracts

The support. Backs the peptide load on firmness and elasticity so the change holds between shipments rather than fading.

Step 2

Pseudoalteromonas Ferment Extract

Marine ferment

The cushion. Improves elasticity and holds hydration in the dermis — the bounce that young skin has and tired skin does not.

Step 3

Sodium Hyaluronate

Low molecular weight hyaluronic acid

The hydrator. Small enough to hydrate below the surface rather than sit on top of it, which is why it is the fastest visible win in the first two weeks.

Step 2

Tocopheryl Acetate

Vitamin E

The partner. Works with vitamin C against oxidative damage; together they protect more than either does alone.

Step 2

Sodium Cocoyl Wheat Amino Acids

Wheat-derived surfactant

The gentle clean. Lifts impurities without stripping the oils that hold the barrier together — a stripped barrier looks older, not cleaner.

Step 1

Glycerin

Humectant

The baseline. Draws and holds water in the skin, which is most of what separates plump skin from tired skin.

All steps

Membership

Take the
90-Day Challenge.

One box covers the full 90 days: all three steps, dosed as one program. Membership resupplies you every 90 days and funds the lab that makes it — no wholesaler, no retailer, no media budget in the price.

$290per shipment, every 90 days

Step 1 · Cleanse177 ml / 6 fl oz

Step 2 · Treat30 ml / 1 fl oz

Step 3 · Moisturize50 ml / 1.7 fl oz

SupplyA full 90-day challenge

ResupplyEvery 90 days, free shipping

CommitmentNone — cancel any time

Guarantee60 days, full refund

The complete AC Skin Science three-step program

Medical grade

Dermatologist formulated

Clinically tested

Paraben free

Not tested on animals

Vegan

FAQ

Questions

What is the 90-Day Challenge?

Use the three-step program twice a day for 90 days — one full shipment, and roughly how long dermal collagen takes to complete a remodelling cycle. Photograph your face before you start and again at day 90, in the same light. That comparison is the challenge. A 60-day money-back guarantee sits underneath it, so you can stop and be refunded long before the finish.

What if it does not work for me?

60 days, full refund. Opened bottles are covered and nothing needs to be sent back. That is the whole risk you are taking: none.

Why 90 days and not 30?

Because the change you actually want is the slowest one. Surface texture moves in two weeks and tone at about a month, but dermal collagen takes a full cycle to remodel. Judging a system at 30 days means judging it before the firming work has surfaced.

What makes this more powerful than what I use now?

Dose and combination. Most shelf skincare carries one hero active at a concentration chosen for shelf life, not effect. This is twelve actives working on four aging pathways at once, dosed on the assumption the other two steps are in use — the strongest formulation we can make without a prescription.

Can I buy the products individually?

No. The three steps are dosed relative to one another and were tested as one regimen. Split up, the concentrations no longer match what was proven.

What am I funding, exactly?

The lab. We are member funded: no wholesaler, no retail markup and no media budget between what you pay and the formulation and clinical work it pays for.

How often does it resupply?

Every 90 days, which is one full challenge and one full supply. Shipping is free and you get a notice a week before each one.

Can I cancel?

Any time before the next resupply bills, from your account or by contacting us. No minimum term, no cancellation fee.

Do I need a prescription?

No. Pharmaceutical-grade actives at clinically studied concentrations, available without one.

Can I use it with other products?

Yes, though not alongside other retinoids or exfoliating acids at the same time of day. Sunscreen goes over Step 3 in the morning.

90 days to a
younger looking you.