Damage to the skin barrier not only leads to dehydration, dryness and itching, but also tends to induce a variety of skin problems such as sensitive skin, Akne, dermatitis and psoriasis, usw. In addition to systemic and topical medications, LED red light therapy, which has the advantages of being non-invasive, painless, and with no recovery period, is quite popular in the Department of Dermatology.
Previous clinical studies have found that red light irradiation can reduce the rate of transdermal water loss from the skin, increase the hydration of the stratum corneum, inhibit the formation of melanin, and maintain the tight alignment of collagen fibers, which in turn significantly improves the appearance of the skin and the skin barrier function.
How does red light repair the skin barrier?
Red light exposure reduces transdermal water loss
Research shows that red light irradiation can promote the proliferation and differentiation of keratinocytes, making the stratum corneum cells more tightly arranged, and at the same time stimulate the synthesis of intercellular lipids, such as ceramides, fatty acids, usw. These lipids can fill in between the cells to form a continuous, hydrophobic lipid film. These lipids can fill in the stratum corneum cells, forming a continuous, hydrophobic lipid film, like the skin put on a layer of “waterproof clothing”, effectively preventing the water from the skin to the external environment diffusion, so as to reduce the loss of transdermal water.
In the study for sensitive skin population, the transdermal water loss rate before irradiation, immediately after irradiation, and 1h after irradiation showed a gradual decreasing trend as the number of irradiation days increased. The results suggest that 640 nm red light helps to protect the integrity of the skin barrier, reduce water loss, and keep the skin moisturized.
Red light irradiation can maintain the hydration of the stratum corneum
Relevant studies have pointed out that red light acts on the mitochondria of skin cells, activating a series of metabolic reactions within the cells, enhancing the activity and function of the cells, enabling them to synthesize and secrete natural moisturizing factors more effectively, such as hyaluronic acid, lactate, urea, usw. These substances can absorb water from the dermis and the external environment, thus maintaining a higher level of water content and hydration.
It is worth mentioning that proper and effective moisturizing care of the skin after red light irradiation helps the skin to recover and improves the overall skin condition and the overall effect of the treatment.
Red light irradiation inhibits melanin formation
Several studies have found that red light irradiation results in changes in the expression of signaling molecules related to tyrosinase activity in melanocytes, leading to the inhibition of tyrosinase activity, thus reducing melanin synthesis and maintaining the healthy state of the skin.
Gleichzeitig, red light has a certain antioxidant effect, can promote the activity of intracellular antioxidant enzymes, such as superoxide dismutase, glutathione peroxidase, usw., to reduce the level of intracellular ROS, which reduces the promoting effect of oxidative stress on melanin synthesis, helping to reduce the accumulation of hyperpigmentation, reduce inflammatory damage.
Red light irradiation can promote new collagen synthesis
A large number of clinical studies and data have confirmed that red LED light irradiation can promote the proliferation and migration of fibroblasts, promote the degradation of broken elastic fibers and deformed collagen in the dermis, thus promoting the synthesis of new collagen, making the dermal collagen fibers aligned neatly and closely, and the density increased significantly, showing improvement in the wrinkles of the skin, firmness, and other protective effects of slowing down skin aging.
In the treatment study for patients with stretch marks, the experimental results also showed that red light irradiation can significantly upregulate the expression of TGF-β in human dermal fibroblasts and at the same time upregulate the expression of collagen genes, which promotes collagen production and makes stretch marks gradually fade away.
MERICAN whitening chamber guards the skin barrier
In addition to the above cited, clinical studies and data in several other related fields have fully proved the safety and effectiveness of red light in repairing the skin barrier. More critically, LED red light therapy as a cosmetic technology has been approved and recognized by the U.S. Food and Drug Administration (FDA).
Based on red light therapy, MERICAN’s third generation whitening cabin integrates the multi-ratio composite light source technology co-developed by MERICAN and the German team. Through whole-body irradiation, it can activate the activities of mitochondria and enzymes to provide sufficient energy and material basis for the metabolism of skin cells, which can help promote collagen synthesis, reduce inflammatory damage and melanin deposition, and achieve the effect of relieving skin discomfort, whitening the skin and strengthening the skin barrier.
Damage to the skin barrier not only affects the aesthetics of the skin, but also its health. If you want to achieve beautiful, healthy skin and slow down the ageing process, you can start by protecting and repairing the skin barrier.
