What are peptides and what are they for?

In the world of skincare, peptides have gained popularity as one of the most effective and versatile ingredients. But, what are peptides and what are they for? In this article, we will explore peptides in depth, including their types and the benefits they offer, as well as the Biotherm products that contain them. Let's discover all their properties!

2^th of April 2025

By Biotherm

What are peptides?

Peptides are short chains of amino acids, which are the building blocks of proteins. Depending on the number of amino acids they contain, they can be classified into different types, such as oligopeptides, polypeptides, dipeptides, tripeptides, tetrapeptides, pentapeptides and octapeptides. Peptides play a crucial role in many biological functions, including tissue repair and cellular communication.

So, in simple terms, what are peptides? They are protein fragments. Since they’re smaller than complete proteins, they can penetrate the skin more easily, making them ideal for use in skincare products.

What are peptides used for?

Peptides serve a wide range of functions in the body, but when it comes to skincare, they are especially valued for their anti-aging and skin-repairing properties. Here are some of the main benefits of peptides for the skin:

Stimulating collagen production. One of the main roles of peptides is to stimulate collagen production — a protein essential for keeping the skin firm and elastic. As we age, collagen production decreases, leading to wrinkles and sagging. Peptides can help counteract this process.
Improving the skin barrier. The skin barrier is the skin's first line of defense against external factors such as pollutants and UV rays. Peptides help strengthen this barrier, improving hydration and protecting the skin from further damage.
Reducing inflammation. Some peptides have anti-inflammatory properties, which can help soothe irritated skin and reduce redness.
Skin repair. Peptides can accelerate the skin's healing process, promoting cell regeneration and the repair of damaged tissues.
Antioxidants. Some peptides also act as antioxidants, protecting the skin from damage caused by free radicals and other environmental factors.

What are the different types of peptides?

Now that we know what peptides do, it’s important to understand the different types — each with its own unique functions and benefits for the skin. Next we’ll explain some of the most common types of peptides:

Oligopeptides

Oligopeptides are short chains of amino acids, generally made up of 2 to 20 amino acids. Due to their small size, they can penetrate the skin easily and act effectively. These peptides are known for their ability to stimulate collagen and elastin production, improving skin firmness and elasticity.

Polypeptides

Polypeptides are longer chains of amino acids, containing more than 20 amino acids. They have a more complex structure and can play multiple roles in skincare, including cell repair and improving the skin barrier. Polypeptides are very effective in anti-aging treatments due to their ability to stimulate the production of structural proteins in the skin.

Dipeptide. Made up of two amino acids. Dipeptides can act as antioxidants and help reduce inflammation.
Tripeptide. Made up of three amino acids, these peptides are known for their ability to stimulate collagen production and improve skin firmness.
Tetrapeptide. With four amino acids, tetrapeptides can help reduce inflammation and improve cell regeneration.
Pentapeptide. Made up of five amino acids, pentapeptides are effective in stimulating collagen and reducing wrinkles.
Octapeptides. These peptides contain eight amino acids and are known for their ability to relax facial muscles, which can reduce the appearance of fine lines and wrinkles.

Biotherm products containing peptides

Alright, skincare lovers, now that you know what peptides are and what they do, which are the best products containing this ingredient? At Biotherm, we have developed a line of peptide products designed to maximize the benefits of these powerful ingredients. Read on to discover all their properties!

BLUE PEPTIDES UPLIFT SPF 30

This product combines sun protection with the anti-aging benefits of peptides. It contains a blend of peptides that help stimulate collagen production and protect the skin from UV damage. In addition, its light formula is ideal for daily use, leaving the skin moisturized and protected.

The Blue Peptides Uplift Day Cream SPF 30 provides your face with daily sun protection in a lightweight, fast-absorbing formula. It also helps firm the skin and redefine facial contours. After two months of use, 67% of women feel their skin firmer, thanks to its collagen peptide formula.

BLUE PEPTIDES UPLIFT DAY CREAM

Specifically formulated for daytime use and for all skin types, the Blue Peptides Uplift Day Cream contains a potent combination of peptides that work to firm the skin and reduce the appearance of wrinkles. Your face will look firm, smooth and luminous all day long. In addition, 96% of women who try it experience an instant rosy glow and a firming effect in as little as 4 hours.

BLUE PEPTIDES UPLIFT NIGHT CREAM

Designed to take advantage of the skin's natural nighttime regeneration process, Blue Peptides Uplift Night Cream contains peptides that help repair and rejuvenate skin while you sleep. Its nourishing formula penetrates deep into the skin, stimulating collagen and elastin production for firmer, smoother skin upon awakening. Reduce the appearance of wrinkles and fine lines and get that lifting effect you've been looking for!

BLUE PEPTIDES UPLIFT DAY CREAM FOR DRY SKIN

The anti-aging Blue Peptides Uplift Day Cream for Dry Skin combines the firming power of collagen peptides with the deep hydration dry skin needs. Specifically designed for this type of skin, it has a rich and creamy texture that leaves the face feeling soft, supple and comfortable all day.

Now you know what peptides are — a powerful and versatile ingredient in the world of skincare that stimulates collagen production and strengthens the skin barrier, among other transformative skin benefits. Want to start taking care of your skin? Unlock the power of peptides with Biotherm!