Product

Timeless Skin Care 20% Vitamin C + E Ferulic Acid Serum

The famous budget alternative to SkinCeuticals C E Ferulic — 20% L-ascorbic acid, vitamin E, and ferulic acid for about $28 instead of $180.
At a Glance
Recommended

The three-ingredient logic is real science. The Duke research behind this style of serum found that vitamin C, vitamin E and ferulic acid together give better antioxidant protection than vitamin C alone, and that the combination helps stabilize the vitamin C.

L-ascorbic acid is the best-studied form of vitamin C, and 20% is a high, effective concentration. It also stings more than lower strengths and works at a low pH, so sensitive skin should be cautious or start with a 10%.

This is an analog of the original studied formula, not the exact tested product, and Timeless does not publish its pH — which for L-ascorbic acid matters as much as percentage. The airtight glass pump helps limit the oxidation that plagues this ingredient.

Key facts

Key activeL-ascorbic acid 20% + vitamin E 1% + ferulic acid 1%
TextureLightweight liquid
Best forAnyone who wants the C E Ferulic formula without the C E Ferulic price
Approximate price$25–$28
FragranceFragrance free

How it works

The comparison people want to make mostly holds up.

SkinCeuticals C E Ferulic — the product this is modeled on — is 15% L-ascorbic acid, 1% vitamin E, 0.5% ferulic acid, and costs around $180. Timeless is 20% L-ascorbic acid, 1% vitamin E, 1% ferulic acid, for about $28.

The three-ingredient logic is real science, not a marketing formula. The Duke research behind it found vitamin C, E, and ferulic acid together give better photoprotection than vitamin C alone, and that the combination stabilizes the vitamin C.

Timeless now ships in glass with an airtight pump, which fixes the biggest historical criticism — the old dropper bottle let air in with every use.

At roughly a sixth of the price, this is one of the better value propositions in skincare.

Everyday habits

How to use it
  • When: morning suits antioxidant serums, under sunscreen.How much: a few drops on clean skin. Steps: apply before moisturizer and let it absorb. Sunscreen: vitamin C is not sun protection — always follow with SPF in the day. Storage: it oxidizes; the brand suggests refrigerating it and using it within 3–6 months. Replace it if it darkens.
Who should be careful+

It is an analog, not a clinical duplicate. SkinCeuticals' specific ratio and pH were the ones actually studied. Timeless uses a reasonable variation. That is not the same as being the tested formula, and honest readers should know the difference.

Timeless does not publish its pH, and for L-ascorbic acid pH matters as much as percentage. This is a real gap — and to be fair, most brands hide it.

It oxidizes, and Timeless says so. They recommend refrigerating it and using it within 3–6 months. Take that seriously.

20% stings. This is a high concentration. If you are new to vitamin C, start with the 10%.

Questions people ask+
How is this like SkinCeuticals C E Ferulic?It follows the same vitamin C, E and ferulic acid logic at a much lower price. It is an analog, not the identical tested formula.
Will it sting?It can. 20% L-ascorbic acid at low pH is strong.
Why does it need refrigeration?Vitamin C oxidizes; cold storage and prompt use help it last.
Is it fragrance-free?Yes. The formula is fragrance-free.
Do I still need sunscreen?Yes. Vitamin C does not replace SPF.
Full ingredient list+

Water, Ethoxydiglycol, Ascorbic Acid, Propylene Glycol, Tocopherol, Polysorbate 80, Panthenol, Ferulic Acid, Sodium Hyaluronate, Benzyl Alcohol, Dehydroacetic Acid

References+

1. Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin. (https://pubmed.ncbi.nlm.nih.gov/16185284/) — The Duke University study showing that adding ferulic acid to a solution of L-ascorbic acid and vitamin E improves chemical stability of the vitamins and roughly doubles photoprotection (from ~4-fold to ~8-fold), backing the 'three-ingredient logic' and stabilization claims. 2. UV photoprotection by combination topical antioxidants vitamin C and vitamin E. (https://pubmed.ncbi.nlm.nih.gov/12789176/) — Duke research demonstrating that a combination of topical vitamin C and vitamin E provides superior UV photoprotection compared with vitamin C or vitamin E alone, supporting the claim that the combination beats vitamin C by itself. 3. Topical L-ascorbic acid: percutaneous absorption studies (https://pubmed.ncbi.nlm.nih.gov/11207686/) — Establishes that L-ascorbic acid must be formulated below pH 3.5 to penetrate skin and that ~20% is the maximum concentration for optimal absorption, supporting the science behind a 20% L-ascorbic acid formulation. 4. 20% Vitamin C + E Ferulic Acid Serum (https://www.timelessha.com/products/20-vitamin-c-e-ferulic-acid-serum-1-oz) — Manufacturer page confirming the Timeless product is 20% L-ascorbic acid with vitamin E and ferulic acid, priced about $28, and now shipped in a glass bottle with an opaque/airtight pump to minimize oxidation (addressing the old dropper-bottle criticism).