Terapi cahaya merah berfungsi melalui proses yang dipanggil photobiomodulation. Panjang gelombang cahaya tertentu diserap oleh komponen di dalam sel, yang boleh mempengaruhi cara sel menghasilkan dan menggunakan tenaga.
Penyelidik telah mencadangkan beberapa mekanisme yang mungkin menjelaskan kesan yang dilaporkan dalam kajian terapi cahaya.
Menyokong Pengeluaran Tenaga Selular
Salah satu teori yang paling banyak dibincangkan di sebalik fotobiomodulasi melibatkan mitokondria.
Mitokondria bertanggungjawab untuk menghasilkan banyak tenaga yang diperlukan oleh sel. Tenaga ini, dalam bentuk adenosin trifosfat (ATP), menguasai hampir setiap proses selular, termasuk penyelenggaraan dan pembaikan tisu.
Penyelidikan mencadangkan bahawa cahaya merah dan inframerah dekat boleh diserap oleh enzim dalam rantai pernafasan mitokondria yang dipanggil cytochrome c oxidase.. Interaksi ini telah dikaji untuk potensi pengaruhnya terhadap metabolisme tenaga selular.
Jika sel menerima tenaga yang boleh digunakan dengan lebih cekap, teori itu berlaku, tisu di bawah tekanan—seperti otot yang letih, memulihkan kulit, or irritated joints—may be better supported during routine maintenance and repair.
Modulating Inflammation and Oxidative Stress
Photobiomodulation has been widely studied for its potential effects on inflammatory signaling and oxidative stress.
The goal is not to eliminate inflammation completely, since inflammation plays an important role in recovery and immune function. Sebaliknya, researchers are interested in whether light exposure can help maintain an appropriate inflammatory response.
This is one reason red light therapy continues to attract interest in sports recovery and musculoskeletal research.
Supporting Circulation
Blood vessel function and local circulation help deliver oxygen and nutrients to working and recovering tissues.
Photobiomodulation has been investigated for its potential effects on vascular signaling and blood flow. Improved circulation is one proposed explanation for why some users report feelings of relaxation and reduced muscle tightness after a session.
Stimulating Fibroblast and Collagen Activity
Fibroblasts are specialized cells responsible for producing collagen, the structural protein that gives skin its firmness and elasticity.
Laboratory and clinical studies have examined whether specific red wavelengths can influence fibroblast activity and collagen synthesis. This line of research underpins most of the skin-related claims associated with red light therapy.
Namun begitu, kebolehpercayaan biologi hanyalah permulaan. A mechanism that looks promising in a laboratory does not automatically mean that every commercial device will produce the same result for every user.
