Red Light Therapy

Light therapy (also known as photobiomodulation) uses specific wavelengths of light (most commonly red and near-infrared, with targeted use of blue light) to influence fundamental biological processes in the body. Red and near-infrared wavelengths are absorbed primarily by mitochondrial components within cells, where they improve the efficiency of ATP production, the cell’s primary energy source. By supporting cellular energy availability, these wavelengths help fuel processes such as tissue repair, inflammation regulation, circulation, and nervous system balance. This shared cellular mechanism helps explain why red and near-infrared light are used across a wide range of family health applications, from injury recovery and immune support to brain and gut health. 

Blue light works through a different, more surface-level set of mechanisms. Rather than targeting mitochondrial energy production, blue wavelengths interact primarily with chromophores in the skin and superficial tissues, including bacterial porphyrins and immune-related signaling pathways. This makes blue light particularly useful for applications such as acne, blemish control, and certain inflammatory skin conditions that are common in children and teens. When used at appropriate intensities and durations, blue light may support skin health without penetrating deeply or disrupting underlying tissue. 

Together, these complementary mechanisms explain why “light therapy” is not a single effect, but a flexible tool that may be adapted to different tissues, ages, and health needs within a family.

Excerpt from Red Light Therapy for Family Health: Using Light Therapy to Support the Whole Household by Genevieve Newton

Evidence-based uses for Red Light Therapy include:

• Reduces inflammation

• Improves skin health

• Decreases pain

• Improves athletic performance

• Reduces depression and anxiety

• Improves cognitive function

• Speeds healing from injury

• Promotes fat loss

• Improves immune function

• Improves sleep