PBM / Photobiomodulation

The Science

Anxiety, mood, and sleep

The clearest clinical signal for brain-targeted PBM so far is in anxiety and sleep. In an 8-week pilot study of generalized anxiety disorder, Hamilton Anxiety scores fell from 17.3 to 8.5, with a large effect size (d = 1.47) and better sleep (Maiello et al., 2019). In a 2025 randomized controlled trial in chronic insomnia, just 3 sessions of frontal tPBM improved Pittsburgh Sleep Quality Index scores by 4.6 points versus sham, while daytime sleepiness fell by 4.1 points (Mehdizadeh et al., 2025).

Autism, attention, and cognition

PBM is also becoming more relevant in developmental and cognitive work. In a randomized sham-controlled trial in children aged 2 to 6 years with autism, active treatment improved CARS scores by 7.23 points more than sham after 8 weeks (Leisman et al., 2024). Published and ongoing work with Vielight technology also spans cognition-focused and neurorehabilitation contexts, which fits well with a practice that combines PBM with other brain-based tools.

Brain-state modulation and recovery

PBM is especially interesting when the goal is to support readiness, recovery, and network regulation. In a randomized sham-controlled pilot study, a single session of 40 Hz near-infrared tPBM significantly increased resting-state alpha, beta, and gamma power, reduced delta and theta, and changed measures of brain-network synchrony (Zomorrodi et al., 2019). That kind of result helps explain why PBM can pair well with neurofeedback in a broader treatment plan.

Muscle recovery and physical performance

The evidence base for full-body red and NIR PBM in exercise recovery is well-established. In a systematic review and meta-analysis of randomized trials, pre-exercise photobiomodulation consistently reduced creatine kinase — a key marker of muscle damage — alongside improvements in muscle fatigue and force recovery compared with sham, with effects strongest when applied before high-intensity exercise (Leal-Junior et al., 2015). These findings make full-body PBM a practical tool in athletic and high-performance contexts where session-to-session recovery shapes how well a person can train, compete, or sustain a demanding schedule.

Chronic pain, musculoskeletal conditions, and inflammation

For musculoskeletal pain, red and NIR PBM has a substantial controlled evidence base. In knee osteoarthritis, multiple randomized trials and meta-analyses have found consistent reductions in pain intensity and improvements in function with NIR wavelengths. In chronic low back pain, systematic reviews support meaningful pain reduction and functional improvement. At the tissue level, controlled studies have documented reductions in pro-inflammatory markers including TNF-α and IL-1β, which is relevant when local or systemic inflammation is part of the picture. Combined with brain-targeted PBM and neurofeedback, the full-body approach can address both the peripheral and central components of persistent pain.

In practice

In practice, the two PBM formats serve different purposes. The Vielight is the starting point when the goal is brain regulation — sleep, stress, cognition, anxiety, or post-injury recovery. The full-body panel becomes most relevant when the case involves musculoskeletal pain, physical recovery, systemic inflammation, or when tissue-level readiness needs to be supported alongside brain-based training. In some cases both are used within the same session or broader plan. qEEG can also help clarify where brain-targeted PBM is most likely to add value.