Red Light and Near-Infrared: A Science Explainer

Red Light and Near-Infrared: A Science Explainer

What are Red Light and Near-Infrared Light?

    Red light and near-infrared (NIR) light are both part of the electromagnetic spectrum, which includes all types of radiation that travels through space, including visible light, radio waves, X-rays, and more. Red light has a wavelength range of approximately 620-750 nanometers (nm) and is visible to the human eye, while near-infrared light has a longer wavelength than red light, ranging from around 750 nm to 1.4 micrometers (µm) and is not visible to the human eye.

    How do Red Light and Near-Infrared Light Work?

    Red light and near-infrared (NIR) light work differently due to their different wavelengths and energy levels.

    Red light (wavelength 620nm-750nm) penetrates through the surface of the human tissue, with about 80% of its energy being absorbed within the first 2cm. The energy of red light has a significant impact on the stimulation of mitochondria, increasing ATP production and thus enhancing fibroblast activity. This leads to increased cell renewal, surface circulation, and anti-inflammatory discharge.

    Near-infrared light (wavelength 750nm-1400nm) penetrates deeper into the tissue than red light. About 50% penetrates up to 8cm and decreases to less than 1% at 20cm (NASA study). It is well known that infrared energy can heat tissue, and its effect has been proven to be useful for therapeutic pain management. For cosmetic applications, IR stimulates the NaK+ pump, increasing cell membrane permeability, promoting cell pH balance, and enhancing nutrient absorption while eliminating waste by-products.

    The main difference between the two is that near-infrared light penetrates deeper into the body than red light, which means its therapeutic energy can enter and benefit cells that red light cannot enter. When red and infrared energy are used together, biological effects (such as an increase in collagen and elastic fiber bundles) are increased. Nowadays, many phototherapy devices emit multiple wavelengths of red or near-infrared light, and some even combine red and near-infrared wavelengths in one device.


    For some skin conditions, some evidence suggests that red light may be more beneficial than near-infrared light. For all practical purposes, a combination of near-infrared or red light and near-infrared light may be ideal.

    What are the Benefits of Red Light and Near-Infrared Light?

    Red light and near-infrared light have a range of benefits, depending on the application. In medical treatments, red light has been used to stimulate cellular activity and reduce inflammation, and NIR light has been used to provide information about physiological parameters in medical imaging.

    As the combination of the high degree of penetration in the skin and absorption by respiratory chain components, light in the spectralrange from 600 to 1400 nm is helpful for promoting wound healing, tissue repair, and skin rejuvenation. Studies have shown that red and near-infrared light in this wavelength range can significantly reduce fine lines, wrinkles, and rough skin, increase collagen density in the dermis, and broadband polychromatic PBM showed no advantage over the red-light-only spectrum. The function of LED red light is much more powerful. There is an "optical window" in skin tissue covering the red and near-infrared light wavelengths, where the effective tissue penetration of light is maximized. According to reports, it has many health benefits and broad application prospects in the medical field. For example, LED 660 nm irradiation promoted anti-proliferative activities through .autophagy in breast cancer origin cells. These findings have suggested that LED 660 nm might be developed and employed as an alternative cancer treatment method in the future. In addition, red light is used frequently to improve androgenetic alopecia, and near-infrared light also can be used to improve depressive disorder.

    HIME SAMA Miracle STAR Led Light Therapy Mask

    Transform your skin with the HIME SAMA Miracle STAR Light Therapy Mask and experience the many benefits of red and infrared light therapy. This cutting-edge device is an exceptional ally for anti-aging and anti-acne treatments.

    In its first mode, the mask combines red light therapy and infrared therapy to promote collagen production and reduce inflammation. With red light penetrating deeply, collagen levels increase, smoothing out wrinkles and fine lines for firmer, younger-looking skin. Additionally, the anti-inflammatory properties of red light can work wonders on acne-prone skin.

    Why choose Miracle STAR? Its wireless and portable design allows you to enjoy skin treatments anytime, anywhere without needing to be tethered to a wall outlet. The easy-to-use LED mask is operated via a single button, making it incredibly user-friendly. Lightweight and comfortable, it fits snugly over your face, ensuring a relaxing experience every time you use it. Give yourself the gift of beautiful, healthy skin with the HIME SAMA Miracle STAR Light Therapy Mask.



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