Your skin barrier plays a vital role in both your skin’s health and appearance. It’s a physical barrier to the external environment, filtering out pollution and oxidative stress.
Silk proteins act as an extension of this barrier by creating a shield to defend your skin against aggressors. This helps seal in hydration and stabilize active ingredients so they can work harder. By replenishing your skin's barrier function, silk proteins reduce fine lines, smooth texture and improve skin firmness and elasticity.
Silk bonds with other proteins and molecules in the skin, firming it up and increasing hydration levels. It may also help deliver ingredients that are notoriously hard to get into the dermis.
Silk protein is a moisturizing, anti-aging, and pollution-protecting miracle skincare ingredient that enhances your overall radiance and glow.
We’re breaking down everything you need to know about the benefits of silk in your skincare routine below.
Silk is a natural protein fiber that comes from insect larvae. The most common silk is obtained from the cocoons of the larvae of the mulberry silkworm, or Bombyx mori.
The Bombyx mori is native to, you guessed it- China. These mulberry silkworms feed on the leaves of the white mulberry tree. White mulberry leaves are rich in antioxidants, making the silk produced by these silkworms naturally antioxidant-rich as well.
Because silk is a protein fiber, it is chemically very similar to human skin. This is what makes silk protein such an ideal ingredient to use in skincare.
Silk protein is a fibrous protein formed by converting silk from the cocoon of the silkworm. Its molecular structure is similar to that of the collagen fibers that make up our skin. It naturally helps to increase skin elasticity, speeds up skin cell functioning, prevents wrinkles, and tightens and smooths the skin.
There are two specific proteins in silk with skincare benefits: sericin and fibroin. Sericin forms a layer of protection over the skin and helps promote hydration. Fibroin helps repair skin cells and balance moisture levels. Let’s take a closer look at each.
Sericin is the outer layer of silk protein that helps bind the strands of silk together into a cocoon. It helps to coagulate and heal wounds, reducing the risk of infection. Sericin is the silk protein most commonly found in hair products. This is because silk proteins help to prevent and repair hair damage.
Fibroin is the protein on the inside of silk. Because it’s on the inside, fibroin is responsible for silk’s structure. Most skincare products use the fibroin protein because of its high percentage of glycine and alanine. This combo has amazing effects on the skin.
Fibroin has a high percentage of the amino acids glycine and alanine. The combination of these two acids is very easily absorbed into the skin and has the following benefits when combined.
Let’s dive into these amino acids further...
If you’re not already using skincare products formulated with silk protein, these five reasons might convince you to start.
The following benefits can be reaped by adding products with silk protein into your daily skincare routine.
Silk protein improves skin elasticity, resulting in more buoyant, younger-looking skin.
Silk protein calms inflamed, red skin by increasing cell metabolism and promoting blood circulation. Because of this, firoin promotes an even skin tone and keeps breakouts at bay.
Silk protein helps in plumping up the skin, reducing the signs of aging like fines lines, crows feet, and wrinkles.
Silk protein increases blood circulation to scar tissue. This reduces the appearance of those leftover reminders of previous breakouts.
Sun-damaged skin (particularly from UVB rays) has a hard time retaining moisture and reduced elasticity, often appearing older than it is. Silk protein can help to repair and reverse this damage.
Ingredients derived from silk go by many different names. So how do you know what’s what? And how do you choose the right one? Silk powder, silk peptides, silk protein, and silk amino acids are all common names for silk proteins used in skincare. They all contain the same 18 amino acids, originating from the cocoon of the silkworm.
The difference lies in their particle sizes. This affects their water solubility. It also affects their penetration power into the skin and cuticles of the hair. Silk proteins that can penetrate the skin more deeply are often more powerful.
To get the most out of silk protein in your skincare, look for ingredients like silk amino and silk protein hydrolysate.
These two forms are the most effective at penetrating the skin’s many layers. To produce these proteins, raw silk must undergo alkaline hydrolysis and de-alkylation. This leads to smaller particle sizes for easier absorption.
Hydrolyzed silk promotes elasticity and a smooth complexion. When used in skincare products, hydrolyzed silk protein helps the skin’s water barrier to retain moisture. It also provides a radiant glow.
Silk is a by-product of an animal and is not vegan. But producing silk has a low carbon footprint. Silk is a biodegradable, compostable material. Sustainably derived silk is harvested after the silkworm sheds its cocoon. There is little to no impact on the land, water, and air, and silk doesn’t involve the use of pesticides.