Enhance the sensitivity for tumor radiotherapy
· Red light irradiation increases the oxygen affinity of hemoglobin in red blood cell (RBC) and enhances blood capacity of oxygen carrying.
·  Promote the proliferation of oxygen, improve blood and oxygen supply of hypoxic cells and make them become oxygen-rich cells
· Allow tumor cells in G0 phase to split into proliferative phase and the radiotherapy gain ratio is improved.

Reduce the toxicity of radiotherapy
·  Red light irradiation can activate the body's protective system of free radicals and increase production of many antioxidant enzymes, such as superoxide dismutase (SOD).
·  Remove active oxygen free radicals such as superoxide anion radical effectively.
·Reduce injury because of the large number of free radicals produced in the body when performing radiotherapy

Improve the fatigue of tumor patients
·  Red irradiation increase (melatonin) MT secretion to rehabilitate suppression of the HPA axis and increase NE (norepinephrine) content.
·  Red irradiation increase 5-HT content in pineal body
· Red light is absorbed by the mitochondria strongly to excite the activity of a variety of enzymes such as mitochondrial catalase and superoxide dismutase in which and ATP output will be increased.
· Promote cell metabolism, increase glycogen content in the cells, and promote protein synthesis & adenosine triphosphate decomposition.

Enhance patients’ immunity
· The lymphocytes in the formation of red roses will increase significantly after having been irradiated by red light.
· Red light radiation could enhance phagocytosis of leukocyte and the transformation of lymphocyte, and leukocyte interleukin-2 in the tissue will be increased significantly. It could promote protein synthesis and energy metabolism While changing DNA content in cells.
· Promote phagocytosis of cell and adjust the immune status (including humoral and cellular immunity) bi-directionally

Cardiovascular and Cerebrovascular Diseases
· Red light irradiation can increase deformability of red cell, reduce negative charge on the its surface and reduce aggregation of red cell and platelet;
· Red irradiation can activate fibrinolytic system, regulate kinin - bradykinin balance, reduce the concentration of fibrinogen, improve the level of endogenous heparin, low blood in coagulation state;
·  It can also lower blood lipids.
· It can activate fibrinolytic dissolution system, regulate kinin - bradykinin balance, reduce the concentration of fibrinogen, improve the level of endogenous heparin and keeping the blood in low coagulation state;

Sub-health Rehabilitation
· Increase of ATP output could improve metabolism and strengthen people’s constitution.
·  Increase blood capacity of oxygen carrying and improve microcirculation
·  Lower blood viscosity
·  Eliminate free radicals
·  Enhance immunity
· Improve depression factors.

Depression
·  It is discovered by study that the NE (noradrenalin) and 5-HT of the patients with depression is low. At present, the principle of medication for depression is to regulate NE (noradrenalin) and 5-HT and increase the secretion of them.

· The secretion of the MT (melatonin) will be restrained by red light irradiation further and the content of MT will decrease, after that MT secretion will be thrown back or rebounded, and the restrain to HPA axis will be rehabilitated, then the content of the NE (norepinephrine) will increase.
·The content of 5-HT in pineal will increase by red light irradiation.

Cosmetology, Body Building and Anti-aging
· The red light irradiation increases the activity of SOD in the body and also enhances the elimination of free radicals.
·  It can speed up the blood circulation of skin, improve skin and local micro-circulation, increase the supply of nutrients and accelerate the elimination of metabolites.

· It can promote the proliferation of the fibroblast, collagen synthesis and epidermal cell.

The recovery from fatigue and the improvement of sports ability
·  The adenosine triphosphate(ATP) output will be increased by red light irradiation.
· The blood capacity for oxygen carrying will be enhanced, thus, the ability for muscle to deliver oxygen will be enhanced. Then aerobic endurance of the body will rise.
· Increase the activity of SOD and eliminate free radicals.