The Ordinary Hyaluronic Acid vs The Inkey List Hyaluronic Acid

What is actually different?

At those US prices, The Ordinary with Ceramides costs $0.33 per ml, Original about $0.30, and The Inkey List about $0.38. The Inkey List's UK 30 ml bottle is listed at £12; compare prices within your own market rather than treating pounds and dollars as interchangeable.13

Which should you pick?

• Pick The Ordinary with Ceramides for a light texture and a formula focused on hydration and moisture barrier support.
• Pick The Ordinary Original if you prefer a richer serum and the lowest listed US price.
• Pick The Inkey List if added peptides targeting the appearance of fine lines and firmness are your deciding feature.

A higher price does not mean a moisturizer works better; the ingredient mix matters more. Use the formula and texture differences to make your choice, rather than making price your quality test.5

How do you use them?

1. 1Cleanse your face. For The Inkey List, leave skin damp.
2. 2Apply a few drops of either Ordinary serum to your face, or gently pat a pea sized amount of The Inkey List onto your face and neck.
3. 3Follow with moisturizer. The Ordinary with Ceramides goes before heavier creams or oils; The Inkey List goes before treatments and moisturizer.
4. 4Finish your morning routine with sunscreen of SPF 30 or higher. Both brands direct morning and evening use.

Hyaluronic acid is a humectant, an ingredient that draws water into the skin; ingredients that limit water loss help keep that moisture there. The Inkey List tells you to follow its serum with moisturizer, so the serum has not been promoted to the entire routine.25

The Inkey List allows pairing with retinol and vitamin C, directing a wait of 30 to 60 seconds after its serum before either. The Ordinary with Ceramides can be paired with glycolic acid, peptides, caffeine and squalane. Follow any prescription's own application instructions.14

How soon should you expect results?

The Inkey List offers hydration from first use, with visible plumping, firmness and smoothness typically appearing within four to six weeks. In its 22 person consumer study, 82% reported firmer, smoother skin after four weeks. The Ordinary with Ceramides offers immediate hydration, with improved hydration noticeable after one week and sustained results after four weeks.14

What if your skin is sensitive?

Both brands advise patch testing. Try a small amount on one area before full use; stop if a rash or irritation develops. The Ordinary directs use only on unbroken skin and says to rinse off, stop use and consult a physician if irritation occurs. The Inkey List lists its serum as suitable during pregnancy and breastfeeding.2346

If dryness persists despite moisturizer and a gentle routine, see a healthcare provider. If you have an existing skin condition or recurring irritation, a dermatologist can help choose products without worsening symptoms.56