Ultra Pure Hyaluronic Acid 1.5% Serum

Kiehl's Ultra Pure Hyaluronic Acid 1.5% Serum is hydration stripped to the essentials: just seven ingredients, no fragrance, no colorants. The 1.5% hyaluronic acid concentration pulls in and holds moisture so dry, dull skin looks replenished and feels bouncier.

What it actually does

• Hydrates intensively. Hyaluronic acid helps skin hold on to water, leaving it feeling more supple and bouncy.
• Minimal by design. Only seven ingredients, formulated for easy absorption — nothing extra to irritate or interfere with the rest of your routine.
• Fragrance-free and colorant-free.
• Brand-reported results: Kiehl's cites an instrumental study showing an instant 89% hydration boost, a 4-week consumer study where 83% agreed skin looked replenished after one week, and expert grading that found plumper skin within a week. Brand-run studies — individual results vary.
• Recyclable packaging.

How to use

1. Morning and evening, smooth two to three drops onto clean, dry skin.
2. Follow with moisturiser where your skin needs it.

Kiehl's tricks worth trying: mix a drop into liquid foundation to sheer it out and add glow; layer it under your eye cream for extra hydration; dab a touch over moisturiser on the high points of the face as a subtle highlighter; or pair it with the brand's Niacinamide or Glycolic Acid serums (sold separately) in one routine.

Is it right for you?

Questions

Do I still need a moisturiser on top?

Yes, at least where your skin runs dry. The serum pulls moisture in; a moisturiser locks it there. Kiehl's own suggestion is to follow with your usual cream where needed.

Can I layer it with other actives?

Yes — with only seven ingredients and no fragrance, it's built to slot into any routine. Kiehl's specifically suggests layering it with its Niacinamide serum for oil control or its Glycolic Acid serum for gentle exfoliation (both sold separately).

Is it okay for oily or sensitive skin?

It's formulated for all skin types including oily, and the fragrance-free, colorant-free, minimal formula makes it a sensible pick for easily-upset skin. Patch test if your skin is highly reactive.

How long does delivery take?

Delivery takes 3 to 21 working days, depending on availability. In-stock items arrive sooner; items ordered in for you take longer. Full details in our Shipping Policy.

Payment and returns?

We accept credit card, debit card, Instapay and mobile wallets — no cash on delivery. Returns are for defective, damaged or expired items only, reported within 1 day of delivery; refunds go to the original payment method within 15–30 days. See our Return & Refund Policy.