What is Photobiomodulation Therapy?

Photobiomodulation therapy (PBM) uses carefully chosen wavelengths of red and near-infrared light — usually between 630 and 1100 nanometers — to penetrate skin and soft tissue without generating damaging heat. Unlike UV light, these wavelengths do not burn or damage cells; instead they are absorbed by light-sensitive proteins inside your cells and trigger a cascade of beneficial biological responses. PBM is delivered using lasers or LED arrays and is used in clinics, sports medicine, dermatology offices, and increasingly at home through consumer-grade devices.

How does Photobiomodulation Therapy work?

The primary target inside your cells is a protein called cytochrome c oxidase, a key enzyme in the mitochondria — your cells' energy factories. When red or near-infrared light hits this protein, it boosts the production of ATP (cellular energy currency), reduces oxidative stress, and prompts cells to release signaling molecules that calm inflammation and kickstart repair. In simpler terms, light gives your cells an energy boost and tells them to heal more efficiently. This process also increases local blood flow and stimulates collagen production in skin and connective tissue.

What forms does Photobiomodulation Therapy come in?

Clinical-grade devices use precisely calibrated lasers or high-density LED arrays and are operated by trained practitioners. Home-use LED panels range from small targeted pads to large full-body panels and are generally safe and effective for maintenance and skin health. Laser caps and helmets deliver light to the scalp for hair loss treatment. Wearable pads and wraps target specific joints or muscle groups. For serious medical conditions, clinical devices consistently outperform consumer devices due to higher irradiance and precision.

Where it comes from:

PBM was discovered almost accidentally in 1967 when Hungarian physician Endre Mester found that a low-powered ruby laser stimulated hair regrowth and wound healing in mice. Over the following decades, the therapy expanded into pain medicine, physical therapy, dentistry, and dermatology. The term 'photobiomodulation' was formally adopted by the scientific community in the 2010s to distinguish therapeutic light from harmful or surgical laser applications, and the field has grown substantially with hundreds of controlled clinical trials published to date.

What does Photobiomodulation Therapy help with?

• Chronic pain and musculoskeletal pain: Red and near-infrared light help quiet the inflammatory signals that keep pain going and improve circulation to sore, tight tissues. Many people with conditions like fibromyalgia, tendinitis, or sports injuries notice meaningful relief after a series of sessions, with effects that build over time.
• Neck pain and back pain: Near-infrared wavelengths penetrate deeply enough to reach the muscles and nerves around the spine, reducing local inflammation and muscle tension. Multiple reviews of clinical trials have found consistent, moderate pain reduction — often comparable to physical therapy alone, and additive when combined with it.
• Osteoarthritis and joint pain: PBM appears to reduce the inflammatory enzymes that break down cartilage while boosting cellular repair inside the joint. Patients with knee osteoarthritis in particular have shown improvements in pain scores and range of motion in well-controlled studies.
• Wound healing and tissue repair: This is the most established application of PBM, dating back to its original discovery. Light energy accelerates all three stages of wound healing — closing the wound faster, stimulating collagen deposition, and reducing the risk of excessive scarring. It is widely used in diabetic wound care and post-surgical recovery.
• Hair loss (androgenetic alopecia): Laser caps and helmets using 650–670 nm red light are FDA-cleared for both men and women with genetic hair thinning. The light energizes follicle cells in the growth phase and appears to extend the active growth period, resulting in measurably thicker, denser hair over several months of regular use.
• Skin aging, wrinkles, and texture: Red light stimulates fibroblast cells in the skin to produce more collagen and elastin — the proteins responsible for firm, youthful skin. Regular use has been shown in multiple studies to visibly reduce fine lines, improve skin tone evenness, and speed healing from sun damage or acne.
• Depression and seasonal mood disorders: Transcranial (applied to the forehead and scalp) near-infrared light can reach the prefrontal cortex and appears to boost energy metabolism in brain cells, reduce neuroinflammation, and support neurotransmitter balance. Early clinical trials show promising reductions in depression and anxiety scores, particularly in people who haven't responded well to other treatments.
• Traumatic brain injury and concussion recovery: Near-infrared light applied to the skull can penetrate into cortical tissue and help restore normal energy production in stressed or injured neurons. Clinical studies in mild-to-moderate TBI patients report improvements in sleep, mood, cognitive function, and headache frequency after a course of transcranial PBM.
• Peripheral neuropathy: PBM applied to affected limbs helps reduce the burning, tingling, and numbness of peripheral neuropathy by improving nerve cell metabolism and circulation in small blood vessels. Studies in diabetic neuropathy patients have shown improvements in sensation, balance, and pain scores.
• Oral mucositis and dental pain: One of the most robustly supported uses of PBM is preventing and treating mouth sores caused by chemotherapy and radiation. Low-level laser treatment of the oral mucosa is now recommended in several oncology guidelines for reducing the severity of these painful sores and helping patients maintain nutrition during cancer treatment.

What can Photobiomodulation Therapy help prevent?

• Oral mucositis during cancer treatment (strong clinical support for preventive use when applied before chemo/radiation sessions)
• Muscle soreness and delayed-onset muscle soreness (DOMS) when applied before intense exercise
• Excessive scar formation in healing wounds

Which foods are rich in Photobiomodulation Therapy?

Photobiomodulation is a light-based therapy, not a nutrient, so it is not found in any food. However, the therapy works by supercharging mitochondria and reducing oxidative stress — and the right diet powerfully supports both of those same pathways. To get the most out of PBM sessions, prioritize: (1) Fatty fish (salmon, sardines, mackerel) — rich in omega-3s that reduce inflammation and support cell membrane health, making cells more responsive to repair signals. (2) Leafy greens (spinach, kale, Swiss chard) — packed with magnesium and antioxidants that support mitochondrial function and reduce the oxidative load PBM is trying to clear. (3) Colorful berries (blueberries, raspberries, cherries) — anthocyanins reduce systemic inflammation and support the collagen production that PBM stimulates. (4) Eggs and organ meats — rich in CoQ10, B vitamins, and riboflavin, all essential co-factors in the mitochondrial energy cycle that PBM activates. (5) Beets and leafy nitrate-rich vegetables — support nitric oxide production, which improves blood flow and amplifies the circulation benefits of red light therapy. Foods to limit: heavily processed foods and excess sugar increase systemic inflammation and oxidative stress, directly working against what PBM is trying to achieve.

What are the side effects of Photobiomodulation Therapy?

• Temporary redness or warmth at the treatment site (most common, usually resolves within an hour)
• Mild headache after transcranial (brain-targeting) treatments, particularly in the first few sessions
• Eye strain or damage if appropriate protective goggles are not worn during treatment
• Transient skin tightness or minor dryness with frequent facial use
• Herxheimer-like detox response (fatigue, mild flu-like feeling) in some users during the first week — thought to reflect increased cellular activity and typically passes quickly
• Rare: mild photosensitivity reaction when used alongside photosensitizing medications

Good to know:

Photobiomodulation has one of the best safety profiles of any therapeutic modality. When used at recommended parameters with appropriate eye protection, serious adverse events are extremely rare. Most reported side effects are mild and short-lived.

How much Photobiomodulation Therapy should you take?

• Recommended daily: Clinical parameters vary widely by condition and device. General guidance: Red light (630–680 nm) or near-infrared (810–850 nm) at an irradiance of 10–100 mW/cm², delivering a dose of 2–10 joules per cm² per session for superficial targets; up to 20–60 J/cm² for deep tissue. Session duration typically ranges from 5 to 20 minutes per treatment area depending on device power. Consumer LED panels (typically 20–100 mW/cm²) are commonly used for 10–20 minutes per session. Always follow device-specific manufacturer guidelines.
• Best time of day: Morning or early afternoon is preferred for full-body or brain-targeted sessions, as the energy-stimulating effects can be mildly activating and may interfere with sleep if used late in the evening. Localized pain or wound-healing treatments can generally be done at any time.
• With or without food: No food interaction. Hydration does matter — being well hydrated before sessions supports tissue conductivity and cellular response. Some practitioners recommend light movement or stretching after sessions to enhance circulation to treated areas.
• Time to effect: Acute pain relief: 1–3 sessions. Meaningful anti-inflammatory and healing effects: 2–4 weeks of consistent use. Skin rejuvenation and hair regrowth: 8–16 weeks. Neurological and mood benefits: 4–12 weeks.
• How long to take it: Acute conditions (injury, wound healing): daily or 5x/week sessions for 2–4 weeks, then reassess. Chronic conditions (arthritis, neuropathy, hair loss): 3–5 sessions per week ongoing, with monthly reassessment of progress. Maintenance and skin health: 3–5x/week indefinitely, with a 1-week break every 2–3 months as a general precaution. Avoid the 'more is better' mindset — excess dose (over-irradiation) can reduce effectiveness, a phenomenon called the biphasic dose response.