Red Light Therapy and Blood Glucose: New Study Reveals Promising Results

Red Light Therapy and Blood Glucose: New Study Reveals Promising Results

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In a recent study published by Professors Michael Powner and Glen Jeffery from University College London, light therapy, specifically red light therapy (also known as Photobiomodulation), may offer a way to reduce blood glucose levels following a meal. The research investigated the effects of red light therapy on blood glucose levels in healthy individuals, aiming to provide insights into its potential as a novel strategy for managing postprandial glucose fluctuations.

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What is Glucose?

Glucose is a vital nutrient derived from the breakdown of carbohydrates in our diet and serves as the primary source of energy for the body's cells. Following a meal, especially one rich in carbohydrates, blood glucose levels rise, supplying energy for various bodily functions. However, maintaining these levels within a healthy range is crucial, as prolonged elevation, known as postprandial hyperglycemia, can pose risks to health. [1] Below is a summary of the study design and results:

Study Design

  • Participants: The study involved 30 healthy individuals, divided into two groups: a red light therapy group and a placebo group.
  • Procedure: Each participant underwent two fasting oral glucose tolerance tests (OGTT) to assess glucose metabolism.
  • Intervention: The red light therapy group received 15 minutes of exposure to red light therapy to the upper back before the second OGTT.
  • Measurements: Blood glucose levels and exhaled CO2 levels were measured and analyzed.


The study found that the red light therapy group experienced a significant 27.7% reduction in blood glucose levels following glucose intake compared to the placebo group. Additionally, peak glucose spikes were reduced by 7.5% in the red light therapy group. Increased exhaled CO2 levels in the red light therapy group suggested enhanced glucose oxidation.

For a more comprehensive look at the entire study, click here.


The results suggest that red light therapy could be effective in mitigating postprandial blood glucose spikes, offering a potential non-invasive approach to managing glucose levels and supporting metabolic health. However, further research is needed to explore its precise applications.

Additionally, these findings indicate that supporting better cellular health with the use of red light therapy can lead to systemic improvements throughout the body. For more information about red light therapy and its systemic effects, click here.


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