Peptides…Peptides…Peptides

Understanding the Different Types of Peptides in Skincare

“Peptides” has become one of those skincare words that seems to appear everywhere.

On serums. On moisturizers. On product labels promising firmer, smoother, younger-looking skin.

But seeing the word peptide on the front of a bottle does not tell you very much.

Different peptides can have different jobs, different structures, and different reasons for being included in a formula.

So the better question is not simply, “Does this product contain peptides?”

It is:

“What kind of peptide is it, and what is it designed to do?”

So, what is a peptide?

Peptides are made from amino acids, which are tiny building blocks your body uses to make proteins.

Those proteins include collagen, elastin, and keratin, all of which help give skin its structure, strength, and resilience.

Think of amino acids as individual building blocks, peptides as short groups of those blocks linked together, and proteins as much longer, more complex chains.

Because those building blocks can be arranged in different ways, peptides can have different shapes, functions, and roles in skincare.

Different peptides can have different jobs.

In skincare, peptides are often grouped by what they are designed to do.

• Signal peptides act somewhat like messengers. They are used to support processes connected to skin structure, firmness, and renewal.
• Carrier peptides bind to certain trace elements and help make them available for processes within the skin. Copper peptides are one of the most familiar examples.
• Enzyme-inhibiting peptides are designed to interact with enzymes involved in processes such as the breakdown of components that help support the skin.
• Neurotransmitter-influencing peptides are used in products designed to soften the appearance of expression lines by interacting with signaling related to facial movement.
• Cyclic peptides are different because they are defined more by their structure than by one specific function.

Instead of remaining in an open chain, where the amino acids are connected in a line with two ends, a cyclic peptide loops back on itself to form a ring. That shape can influence its stability, structure, and biological activity.

One especially interesting example is heterophyllin B, a naturally occurring cyclic peptide found in Prince ginseng.

Prince ginseng, or Pseudostellaria heterophylla, is a traditional East Asian medicinal plant. Although it is not a true ginseng, it naturally contains bioactive compounds, including heterophyllin B.

Heterophyllin B has attracted interest in modern skincare research because its ring-shaped structure may make it more stable than some open-chain peptides. Researchers have also studied how it may support processes related to skin renewal, firmness, and the proteins that help give skin its structure.

Its natural origin, unique shape, and potential to support these skin processes are what make it especially interesting to cosmetic chemists.

It is also a good reminder that peptide science is not limited to ingredients created entirely in a laboratory. Sophisticated peptide structures can occur naturally in plants.

This is what makes modern peptide skincare so interesting: the word “peptide” no longer tells the whole story.

Understanding the type of peptide, its structure, and its intended purpose gives you a much better picture of what that ingredient is meant to bring to a skincare formula.

At Petals & Grace, we believe that understanding your ingredients helps you make more intentional choices for your skin.

Peptides may be small, but their differences can be meaningful—and knowing a little more about them can help you look beyond the label and better understand the care you are choosing for your skin.