201 products on sale today. SHOP THE DEALS ▸

The OrdinaryAscorbyl Tetraisopalmitate Solution 20% in Vitamin F

Instead of Sunday Riley C.E.O. Serum, $40Vitamin C oil

$18.45 $20.50

You save $2.05 (10%) off the list price

or save up to 10% more with Subscribe & Save on Amazon

The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F
The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F, view 2
The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F, view 3
The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F, view 4
The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F, view 5

Size 30 ml, $18.19 / fl oz

Sold by Amazon.com. Amazon's shipping and returns apply. Who sells The Ordinary on Amazon

Buy on Amazon

Amazon price as of Sep 28, 2026, 1:12 AM ET, subject to change: the price on Amazon at checkout is the one that applies. We may earn a commission; the price you pay is the same.

Sunday Riley C.E.O. 15% Vitamin C Brightening Serum

The luxury original: Sunday Riley C.E.O. 15% Vitamin C Brightening Serum, $40

What matches: Same form of vitamin C: tetrahexyldecyl ascorbate, the oil-soluble ester that converts to vitamin C in the skin and stings far less than ascorbic acid, with squalane on both labels.

What it does worse: Sunday Riley puts it in a water-based cream-serum, while The Ordinary dissolves 20% of it in a water-free oil with vitamin F (ethyl linoleate) and jojoba, which suits dry skin better than oily.

See the full comparison

About the Product

What it is: Water-free vitamin C oil: 20% tetrahexyldecyl ascorbate in coconut alkanes with ethyl linoleate (vitamin F), jojoba oil and squalane. 30 ml.

Highlighted Ingredients:

  • Tetrahexyldecyl ascorbate
  • Ethyl linoleate

What Else You Need to Know:

  • Hydrating vitamin C oil: Brightens and balances uneven skin tone while targeting signs of aging.
  • Oil-soluble vitamin C: Formulated with Tetrahexyldecyl Ascorbate, a vitamin C derivative that converts into active vitamin C upon application, reducing irritation.
  • Boosts hydration with vitamin F: Contains Omega 3 and Omega 6 fatty acids to support your skin’s natural hydration barrier, making it ideal for dry skin.
  • Application instructions: Apply a few drops to the face in the morning and evening. Avoid the eye contour and always use sun protection during the day.
  • Antioxidant protection: Provides antioxidant support to protect the skin from environmental damage, maintaining a radiant complexion.

From the Amazon listing.

Skincare dupe guides

Sunscreen dupes with the same UV filters7 pairs · top pick −71%The best beauty dupes under $2012 pairs · top pick −99%Skincare dupes that share the same active10 pairs · top pick −96%Dupes that hand you a bigger bottle as well as a lower price12 pairs · top pick −99%Luxury beauty Amazon doesn't stock 12 pairs · top pick −99%The biggest savings on the site15 pairs · top pick −99%

Alternatives

The luxury original, and other products that do the same job

$18.45 $20.50

$18.19 / fl oz

Buy on Amazon