The original, what makes it special, the shelf parts we use and how to get closer. Add or swap parts and the score updates.
The original · ZO Skin Health
$112 · 50 mL / 1.7 fl oz
An anhydrous (water-free) silicone serum with 10% L-ascorbic acid plus a second ester, tetrahexyldecyl ascorbate, with squalane, vitamin E and CoQ10.
Prices and listings checked Oct 28, 2026. Amazon prices change; the link shows today's price.
Step 2 · The build
Timeless Skin Care
Partial credit means the part only partly matches that standout.
The 100 points
We split 10% Vitamin C Self-Activating into 3 standout parts. Each bar shows what the build earns.
The main stated active.
Oil-soluble second vitamin C form.
Supporting antioxidants and emollient.
Optional
65 / 100. We have not found a shelf product that closes more of the gap yet.
Step 3 · Buy
One link per part. Each opens the retailer in a new tab.
Your build
Running total $27.95
Buy on Amazon (opens in new tab)Snapshot prices. Each link shows today's price.
One bottle instead of a build. Sorted by match score; scores use the same standouts as above.
Timeless Skin Care
No close match yet — we show the nearest formulas.
Why it is close. A 20% L-ascorbic acid with vitamin E and ferulic acid; double the acid, aqueous.
CeraVe
Why it is close. A water-based 10% L-ascorbic acid serum with ceramides and hyaluronic acid. Same main active level; not anhydrous.
Cheaper in store: Vitamin C Serum. In store at Trader Joe's, $9.99 (price as of Oct 28, 2026), no link, we don't earn from this. 1 fl oz. $9.99/fl oz vs $28.99/fl oz, about 66% less per fl oz. A different product, a close match, not identical. Concentration not stated. The ingredient list comes from a third party, so check the label in store: ingredient source (opens in new tab).
Naturium
Why it is close. A gentler vitamin C blend with derivative forms; weaker match to the 10% pure acid.
Timeless Skin Care
Running total
Buy on Amazon (opens in new tab)No gain nowTimeless Skin Care
CeraVe
Running total
Buy on Amazon (opens in new tab)Cheaper in store: Vitamin C Serum. In store at Trader Joe's, $9.99 (price as of Oct 28, 2026), no link, we don't earn from this. 1 fl oz. $9.99/fl oz vs $28.99/fl oz, about 66% less per fl oz. A different product, a close match, not identical. Concentration not stated. The ingredient list comes from a third party, so check the label in store: ingredient source (opens in new tab).
No gain nowCeraVe
Naturium
Running total
Buy on Amazon (opens in new tab)No gain nowNaturium
A trial of 10% L-ascorbic acid with 7% tetrahexyldecyl ascorbate improved photoaging in a half-face study.
Fitzpatrick 2002 · Dermatol SurgTopical vitamin C smoothed skin and lightened pigmentation in a systematic review.
Correia 2023 · J Cosmet DermatolCyclopentasiloxane, Dimethicone Crosspolymer, Ascorbic Acid, Dimethicone, Citrus Aurantium Amara (Bitter Orange) Peel Oil, Squalane, Tetrahexyldecyl Ascorbate, Tocopheryl Acetate, Ubiquinone, Limonene, Citral, Phenoxyethanol
We split 10% Vitamin C Self-Activating into 3 standout parts worth 100 points in total. The build earns 65 of a possible 100. A full 100 needs every standout fully covered.
Timeless 20% Vitamin C + E Ferulic Acid Serum by Timeless Skin Care is our closest single-product match at 65 out of 100 for $27.95 (1 fl oz (30 ml)). It shares L-ascorbic acid (20%), Vitamin E.
10% Vitamin C Self-Activating costs $112 for 50 mL / 1.7 fl oz. The closest dupe costs $27.95, a saving of about $84.05. Prices change, so check the seller page.
No. Dupes share the key actives but can differ in concentration, vehicle and supporting ingredients. Missing from this one: Tetrahexyldecyl ascorbate, Silicone base. See our methodology for how we score.
Obagi · serum
~$118.95our build, 3 partsOriginal $130, build ~$118.95.
Paula's Choice + Timeless Skin Care + Naturium
Obagi · serum
$74.94our build, 2 partsOriginal $155, build $74.94.
Timeless Skin Care + La Roche-Posay
Obagi · treatment
$91.49our build, 4 partsOriginal $260, build $91.49.
The Ordinary + CeraVe + Naturium