What are Peptides?

May 15, 2025 Lubuuu Inc.

Peptides in skincare are short chains of amino acids, the building blocks of proteins like collagen, elastin, and keratin, which are essential for maintaining skin’s strength, firmness, and elasticity.

What Are Peptides?

Amino acids link together to form peptides. When multiple peptides link, they can form proteins. These proteins give structure, resilience, and a youthful appearance to skin.

There are different types of peptides, such as:

- Signal peptides – tell skin to produce more collagen or elastin.
- Carrier peptides – deliver trace minerals needed for healing.
- Neurotransmitter-inhibitor peptides reduce muscle contractions (like mini-Botox).
- Enzyme-inhibitor peptides slow down the breakdown of collagen.

Why Do We Need Peptides in Skincare?

As we age, collagen production naturally decreases, starting as early as our 20s. That leads to:

- Wrinkles
- Sagging
- Dullness
- Loss of firmness

Topical peptides signal your skin to behave like younger skin by:

- Boosting collagen and elastin
- Enhancing skin barrier function
- Improving hydration
- Reducing inflammation
- Supporting wound healing

Do Peptides Work?

The answer is YES, but with a caveat:

Not all peptides are created equal. Stability, formulation, and concentration matter. They’re most effective when formulated with supporting ingredients like antioxidants, hyaluronic acid, ceramides, and niacinamide.

Look for clinically backed peptides like: Matrixyl (palmitoyl pentapeptide) that stimulates collagen, Argireline (acetyl hexapeptide-8) that reduces expression lines, and Copper peptides promote healing and skin regeneration.

How to Use Peptides in Skincare?

- Best used in serums, moisturizers, or eye creams.
- It can be used day and night.
- It is safe to combine with most ingredients, but avoid layering with strong acids (like AHAs/BHAs) immediately before or after, as this may break them down.