The Art of
Peptide Skincarefirmer-looking, luminous skin
A refined copper peptide serum pairing GHK-Cu with the PAL-150 peptide complex and hyaluronic acid, made to help improve the look of firmness, elasticity and skin smoothness.
Pre-order · Launching soon · ships by December 1, 2026
“We believe the future of skincare is written in PEPTIDES — small, elegant messengers, chosen with intention and presented with care.”
Copper Peptide GHK-Cu
Collagen Support / Elasticity Serum
Collagen support and elasticity care in one daily step. A silky, fast-absorbing serum with a natural copper-blue tint, finished with organic jojoba, coconut and green tea.
- ◆ Helps improve the look of firmer, smoother skin
- ◆ Helps improve the appearance of elasticity and tone
- ◆ Lightweight hydration with hyaluronic acid
Two Peptides. One Purpose.
Two of the most celebrated peptide technologies in modern skincare, paired in a single serum.
GHK-Cu
Copper Tripeptide-1, a copper peptide prized in skincare and used to help improve the look of firmness and elasticity.
PAL-150 Complex
Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7, signal peptides used to help improve the look of fine lines.
Hyaluronic Acid
Weightless hydration that leaves skin looking supple and plump, while creating a silky, refined texture.
Refined-Looking Skin, Daily
Firmer-Looking
Helps improve the look of firmness and elasticity.
Smoother
Helps improve the look of fine lines.
Hydrated
Hyaluronic acid for a supple, plump look.
Radiant
A luminous, even-looking glow.
Two Moments a Day
Cleanse
Begin with clean, dry skin on the face and neck.
Apply
Smooth a small amount of serum over face and neck, morning and night.
Seal
Follow with your moisturizer, and broad-spectrum sunscreen during the day.
Silky. Weightless. Copper-Blue.
The gentle blue tint is the signature of copper peptide. Shades may range from pale blue to a slightly deeper or greenish tone from batch to batch — This is normal for copper peptide formulas.
A fast-absorbing serum that layers beautifully beneath moisturizer and makeup.
Science, Softened by Nature
Peptide technology balanced with a botanical blend of organic jojoba seed oil, organic coconut oil, organic green tea leaf extract and orange peel extract.
Organic Jojoba
Silky, skin-loving seed oil.
Organic Coconut
Nourishing, comforting finish.
Organic Green Tea
A classic botanical extract.
Orange Peel
A bright citrus extract.
Designed in Miami.
Crafted with care.
SIIS Peptides is a peptide-focused skincare house built around one idea: the most advanced ingredients deserve the most considered presentation.
From formula to box, every detail is chosen with intention.
Our Story
We Are Here to Help
Everything about ingredients, the ritual, shipping and returns.
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