Low-Level Laser Therapy
Low-level laser therapy (LLLT) involves the use of relatively low light energy (less than 100-200 mW). LLLT is used to decrease pain and inflammation, stimulate collagen metabolism and wound healing, and promote fracture healing.
Low-Level Laser Therapy (LLLT)
Every day, the human body harnesses the power of light through a series of intricate photochemical reactions. From the photosensitive cells that enable our vision to the synthesis of vitamin D in our skin, light plays an indispensable role in our physiological processes. Given this intimate relationship between light and cellular activity, one naturally wonders: how might other cells in our body respond to light, and can we leverage this response for therapeutic purposes? Enter Low-Level Laser Therapy (LLLT) – also known as Cold Laser Therapy or Photobiomodulation (PBM) Therapy – a groundbreaking treatment method that delves into the fascinating intersection of light and cellular health.
What Is Low-Level Laser Therapy (LLLT)?
Discovered in 1967 by Endre Mester, Low-Level Laser Therapy involves placing a low-power laser near to or on the skin, allowing the photons to move through the tissue and interact with cells in the body.
A Low-Level Laser can be roughly categorised as having a power output of less than 500mW, and is classified by the FDA as either ‘Class IIIB Lasers’, ‘Class IIIR Lasers’, or ‘Class II Lasers’ (i.e. low risk of hazard). Various dosimetry parameters (e.g. wavelength, fluence, power density) are used depending on the device / treatment type.
Benefits and Mechanism of LLLT
Since the development of the procedure, the benefits of LLLT have been studied at length – the photochemical changes that occur in cells as a reaction to the application of light can help in many ways, including:
- Pain Management: Decreases several types of pain, including orthopedic and neuropathic pain.
- Fat Removal: Effective at reducing fat and cellulite with little to no side effects.
- Fungal Nail Treatment: Shown to effectively treat nail fungus with little to no side effects.
- Hair Regrowth: Promising results in the treatment of hair loss.
Although we still have a lot to learn about the effects of light energy on different types of cells, the leading theory is that Low-Level Laser Therapy generates therapeutic effects through stimulating and enhancing specific biochemical processes.
Side Effects and Safety
Low-Level Laser Therapy is widely regarded as a safe treatment choice, particularly when conducted under the expert guidance of medical professionals. Despite its well-documented benefits and robust safety record, LLLT may cause minor side effects, such as temporary discomfort at the treatment site, mild skin irritation, or occasionally, an increase in pain or swelling immediately post-treatment.
Difference Between LLLT and HLLT
High-Level Laser Therapy (HLLT) and Low-Level Laser Therapy (LLLT) differ in their power outputs and applications. HLLT devices have a power output greater than 500mW and are classified as ‘Class IV Lasers’ by the FDA. LLLT devices have a power output of less than 500mW and are classified as ‘Class IIIB Lasers’, ‘Class IIIR Lasers’, or ‘Class II Lasers’. The general theory is that LLLT devices transfer the optimal amount of energy for stimulating and enhancing cell function, while not damaging cells or producing painful heat sensations.