What is Far Infrared?
Far Infrared (FIR) is a type of electromagnetic wave with a wavelength between 5.6 and 1,000 microns (μm). It’s part of the infrared spectrum and lies beyond visible light, meaning it can’t be seen by the human eye — but its heat can be felt.
Far infrared can penetrate the surface of the skin and resonate with water molecules, transforming into deep, gentle heat. Because of this property, FIR is widely used in fields like medicine, wellness, food processing, environmental technology, and industry.
Thanks to its longer wavelength, FIR is known for its ability to penetrate deeper into the skin and stimulate water molecules, which is why it’s often associated with health benefits such as promoting circulation and boosting metabolism.
Classification of Infrared
（Near Infrared, NIR）
Wavelength Range: 0.75 to 3 microns
Features & Applications:
Strong penetration; commonly used in fiber-optic communication, night vision equipment, biomedical imaging, and laser technology.
（Mid Infrared, MIR）
Wavelength Range: 3 to 30 microns
Features & Applications:
Primarily used for thermal imaging, gas analysis, infrared sensing technologies, and scientific research and military surveillance.
（Far Infrared, FIR）
Wavelength Range: 30 to 1,000 microns (or 1 millimeter)
Features & Applications:
Can resonate with water molecules, generating thermal effects that help stimulate blood circulation, revitalize cells, and boost metabolism. Widely used in health products, therapeutic devices, construction, textiles, food processing, and environmental technology.
Principle of Far Infrared
Positive Effects
Far infrared interacts with water molecules inside human cells through resonance absorption, leading to several beneficial effects:
Heat Conversion → Raises the temperature of skin and deep tissues, creating a “deep warming effect.”
Improved Blood Circulation → Helps blood vessels expand, enhancing oxygen and nutrient delivery.
Accelerated Metabolism → Activates cells and promotes the removal of waste and toxins from the body.
Muscle & Joint Relief → Reduces stiffness and muscle fatigue, making it useful for physical therapy and post-exercise recovery.
Thanks to these properties, far infrared plays an important role in healthcare, food processing, industrial drying, and environmental technology.
Sources of Far Infrared
Far infrared mainly comes from natural heat sources, such as solar radiation and mineral emissions. Once absorbed by the human body, this radiant energy is converted into heat, which in turn helps stimulate the body’s circulatory system.
Effects of Far Infrared on the Human Body
Benefits
- Promotes Blood Circulation: Expands capillaries and increases oxygen supply to tissues.
- Supports Cell Repair: Boosts metabolism and helps eliminate toxins from the body.
- Relieves Pain and Inflammation: Eases muscle and joint discomfort.
- Enhances Immunity: The warming effect can stimulate white blood cell activity and strengthen resistance.
Precautions
- Avoid Overexposure: Prolonged use may cause skin overheating and burns.
- Special Groups Should Be Cautious: Pregnant women, people with heart disease, high blood pressure, or vascular conditions should consult a doctor before use.
- Pay Attention to Product Quality: Low-quality far infrared products may fail to meet standards, reducing effectiveness.