Fragrance-free, single-active skincareFree shipping over $60All prices in USD
Onyx

Skincare with nothing withheld

The full formula, stated.

Every product we sell publishes its complete ingredient list, its key active at a stated concentration, its texture, how to use it, and who it is not for. Fragrance-free, single-active formulas — no adjectives doing the work of a label.

15% Vitamin C Serum — Stabilised L-ascorbic acid at 15%, morning use

The formulation record

Most brands tell you a serum is transformative. We would rather tell you it is 15% vitamin C, that it may tingle on first use, and that it is not for the same night as your acids. You can decide about transformative yourself.

What it is made of

The complete ingredient list on every product — the full INCI, in descending order, not a curated highlight reel.

The active, at a stated %

One key active per formula, named and quantified. '15% L-ascorbic acid', not 'brightening complex'. You know exactly what you are applying.

Who it is not for

The line most brands leave out. Patch-test guidance, what not to layer together, and any pregnancy note — read now, not discovered after purchase.

A place to start

The products we would build a routine around first.

Onyx Skin Co. products arranged on polished stone

Fragrance-free · single-active

A short routine you can actually read.

Seven actives

We work with a short list of proven actives.

Seven actives, chosen because the evidence behind them is settled. Each does one job — vitamin C brightens, retinaldehyde smooths, ceramides repair the barrier — and we would rather explain that than hide it inside a proprietary blend.

How each one works

Vitamin C

Stabilised L-ascorbic acid at a stated 15%. Brightens tone and supports collagen. Used in the morning, under sunscreen.

Retinaldehyde

A retinoid one step stronger than retinol and gentler than the strongest clinical retinoids. Night use only, built up slowly.

Niacinamide

Vitamin B3 at 5%. Calms redness, refines the look of pores and supports the barrier. One of the easiest actives to tolerate.

Exfoliating Acids

Glycolic (AHA) and salicylic (BHA) acids at a stated strength. Lift dead surface cells; not for use every night.

Hyaluronic Acid

Multi-weight sodium hyaluronate and glycerin. Draws water into the upper layers of the skin. Layered onto damp skin.

Ceramides

Barrier lipids in a physiological ratio. They are what a compromised or over-exfoliated barrier is short of.

Mineral Filters

Non-nano zinc oxide and titanium dioxide. Sit on the surface and reflect UV; suitable for reactive and post-procedure skin.