The use of peptides in skin restoration after exposure to UV radiation

Ultraviolet radiation (UV) is one of the main factors damaging the skin. Short-term exposure can lead to redness, irritation, or sunburn, while chronic exposure accelerates skin aging, causes loss of firmness, the formation of discolorations, and increases the risk of cancers.

The skin has natural protective mechanisms, such as antioxidants and DNA repair enzymes, but intense or repeated exposure can overwhelm them. This is where peptides play an important role — short chains of amino acids that act as chemical signals, supporting tissue regeneration, collagen production, and protective mechanisms of skin cells.

How UV damages the skin

UV radiation is divided into UVA and UVB. UVB is mainly responsible for sunburn, while UVA penetrates deeper, accelerating skin aging by damaging collagen and elastin fibers and producing free radicals, which are reactive oxygen forms that can destroy cells and speed up degenerative processes.

Peptides used in skin regeneration

1. Signal peptides (Palmitoyl Pentapeptide)

Signal peptides are short chains of amino acids that serve as “signals” for skin cells, mainly for fibroblasts — cells responsible for producing collagen, elastin, and other components of the extracellular matrix.

Mode of action: A signal peptide, e.g., Palmitoyl Pentapeptide, sends fibroblasts a message that the skin needs rebuilding, for example after damage caused by UV radiation.

Effects: Speeds up tissue regeneration, supports healing of micro-injuries, improves skin firmness and elasticity, and helps maintain skin integrity in areas prone to damage.

Benefits for the skin: Reduction of fine wrinkles, improvement of skin density, acceleration of repair processes after sun exposure or mechanical injuries.

2. Copper peptides (NL-GHK-Cu™)

Copper peptides are a combination of a short peptide with a copper ion (Cu), which significantly increases their biological activity. NL-GHK-Cu™ is an example of a copper tetrapeptide used in skin regeneration.

Mode of action: The GHK tetrapeptide binds copper and delivers it to skin cells. Copper helps enzymes produce collagen, elastin, and other important skin components and protects cells from damage. The peptide also stimulates fibroblasts (key for wound healing and maintaining skin integrity), supports the formation of new blood vessels, and speeds up repair of minor skin damage.

Effects: Faster healing of wounds and micro-injuries, improvement of skin structure, reduction of minor damage caused, for example, by UV radiation.

Benefits for the skin: Increased firmness and elasticity, improved skin tone, accelerated repair processes, and strengthened natural resistance of skin cells to oxidative stress.

3. Antioxidant peptides

Antioxidant peptides serve a protective function, neutralizing free radicals and other reactive oxygen forms produced in the skin during oxidative stress, UV radiation, or environmental pollution.

Mode of action: They act as “messengers” signaling skin cells to activate antioxidant enzymes that neutralize free radicals and limit damage to DNA and cell membranes.

Effects: Reduction of oxidative stress, decrease of inflammation, and slowing down of skin aging processes caused by free radicals.

Benefits for the skin: Protection against photoaging, slowing loss of collagen and elastin, reduction of redness, and improvement of overall skin condition and appearance.

Summary

Peptides, including NL-GHK-Cu™, provide modern support in skin regeneration after UV exposure. By stimulating collagen production, protecting cells from oxidative stress, reducing inflammation, and improving the skin barrier, they speed up tissue rebuilding and limit the effects of sun damage. Their use is especially beneficial for people exposed to the sun, athletes, and those caring for healthy and youthful skin.

FAQ

1. What is NL-GHK-Cu™ and how does it work on the skin?

NL-GHK-Cu™ is a tetrapeptide combined with copper that stimulates fibroblasts to produce collagen and elastin. It supports the regeneration of micro-damage in the skin and improves its firmness and elasticity. Additionally, it increases the cells’ resistance to oxidative stress, helping protect the skin from free radicals. Regular use can improve the overall condition and appearance of the skin.

2. Do peptides work immediately after sun exposure?

Some effects, such as soothing redness and irritation, may appear fairly quickly after application. However, full tissue regeneration requires systematic use of peptides over a longer period. This makes the skin more resistant to damage and better able to regenerate. Regular use strengthens the skin’s natural protective mechanisms.

3. Do peptides replace sunscreens?

No – peptides support skin regeneration but do not protect against UV radiation. Sunscreens are still essential to prevent skin damage and premature aging. Peptides work complementarily, aiding tissue repair and strengthening after sun exposure. Their use does not exempt from daily sun protection.

4. Can peptides be used daily?

Yes, peptides are safe for regular use and can be part of daily care. They support skin rebuilding, improve its elasticity, and bolster natural protective mechanisms. Regular use helps maintain the skin in good condition and may slow signs of aging. It is important, however, to use products according to the manufacturer’s instructions.