Hyaluronic Acid Serum
$42.00Lightweight hyaluronic acid and glycerin serum that replenishes moisture for smoother, plumper skin.
Plump & Hydrate
Shipping across the US · Fragrance-free · Serums only
The Serum Brand.
The collection
piani. — The Serum Brand. Five targeted serums, each built around a clear purpose: hydration, balance, brightness, resurfacing, or renewal. A more intuitive way to build a skincare routine around what your skin actually needs.
Hydration Serum
$44.00Botanical daily serum with Cassia seed extract and glycerin for soft, balanced, comfortable skin.
Comfort & Balance
Niacinamide Vitamin Boost
$48.00Niacinamide and vitamin C serum that targets dullness, uneven tone, and dehydration in one step.
Brighten & Refine
Glycolic Acid Serum
$52.00Glycolic acid exfoliating serum with aloe and bilberry for smoother, brighter-looking skin.
Smooth & Refine
Retinol Serum
$54.00Retinol serum with collagen and hyaluronic acid for smoother texture and lasting hydration.
Renew & Smooth
Compare
Five serums, five distinct jobs.
| Hyaluronic Acid Serum | Hydration Serum | Niacinamide Vitamin Boost | Glycolic Acid Serum | Retinol Serum | |
|---|---|---|---|---|---|
| Best for | Fast, water-based hydration | Daily comfort & balance | Dullness & uneven tone | Uneven texture | Fine lines & renewal |
| Key ingredients | Sodium Hyaluronate, Glycerin | Cassia Seed Extract, Glycerin | Niacinamide, Vitamin C | Glycolic Acid, Bilberry, Aloe | Retinol, Collagen, Hyaluronic Acid |
| Primary goal | Plump & Hydrate | Comfort & Balance | Brighten & Refine | Smooth & Refine | Renew & Smooth |
| AM / PM | AM & PM | AM & PM | AM (or PM) | PM only | PM only |
| Experience level | Beginner | Beginner | Beginner | Intermediate | Advanced |
| Pairs with | Hydration, Niacinamide, Retinol | Hyaluronic, Niacinamide, Glycolic | Hyaluronic, Hydration, Retinol | Hydration, Hyaluronic, Niacinamide | Hyaluronic, Hydration, Niacinamide |
| Price | $42.00 | $44.00 | $48.00 | $52.00 | $54.00 |
Hyaluronic or Hydration?
The surge and the steady baseline.
Hyaluronic Acid Serum plumps skin fast with water-binding hydration. Hydration Serum is the calmer, botanical layer that keeps skin comfortable and balanced every day. Think of Hyaluronic as the surge, Hydration as the steady baseline — many people use both, for different jobs.