Episode 19: Circulation Boost: How Red Light Therapy Improves Blood Flow and Heart Health

Episode Overview

Can red light therapy actually improve circulation, widen blood vessels, and support better cardiovascular health? In this episode of the Red Light Therapy Podcast, host Mike Volkin and longevity and sports performance specialist Dr. Alan Inman explore the science behind one of the most important functions in the human body: blood circulation. They break down how red and near-infrared light interact with nitric oxide, a molecule that helps blood vessels relax and widen, potentially improving blood flow, oxygen delivery, and tissue recovery. Dr. Inman also shares findings from human studies suggesting that the effects of light therapy on circulation may continue even after a treatment session ends.

Throughout the episode, Dr. Inman explains why healthy circulation is essential for everything from cellular repair and wound healing to maintaining comfortable temperatures in the hands and feet. He discusses how photobiomodulation may support the body's natural healing processes by improving mitochondrial signaling, reducing inflammation, and helping oxygen and nutrients reach tissues more efficiently. The conversation also explores whether red light therapy can help people experiencing cold extremities, how it may influence blood pressure and heart rate, and what emerging laboratory research suggests about protecting red blood cells from oxidative stress.

The episode also addresses an important distinction between promising research and established medical evidence. Dr. Inman explains why there is not yet a standardized red light therapy protocol specifically for cardiovascular health, and why treatment effectiveness depends on more than simply spending a certain number of minutes in front of a panel. He also explores the role of 850-nanometer near-infrared light in supporting circulation and oxygen availability in tissues. Whether you're interested in improving recovery, supporting healthy circulation, understanding cardiovascular wellness, or getting more out of your red light therapy sessions, this episode provides a practical, science-focused look at the relationship between light, blood flow, and overall health.

Introduction to Circulation and Cardiovascular Health

Time: 00:37

Mike opens episode nineteen by welcoming Dr. Alan Inman back to the Red Light Therapy Podcast and introducing the main topic: improving circulation, blood flow, and cardiovascular health. He highlights Dr. Inman's experience in longevity, regenerative medicine, and red light therapy before setting up a series of practical questions about how light interacts with the body's circulatory system. The episode begins with one of the most fundamental questions about circulation: can red light therapy actually make blood vessels wider?

Can Red Light Therapy Widen Blood Vessels?

Time: 01:23

Dr. Inman begins by explaining how red and near-infrared light may improve circulation through nitric oxide, a signaling molecule that helps blood vessels relax and expand through a process called vasodilation. He compares this mechanism to widening a garden hose, allowing more water to pass through with less restriction. He also shares findings from a human study reporting a 27% increase in blood flow during treatment and a 54% improvement above baseline approximately twenty minutes after the session ended. This section introduces the relationship between light exposure, nitric oxide activity, and improved local circulation, including the possibility that some effects may continue after treatment.

How Better Circulation Supports Faster Healing

Time: 02:31

Mike then asks how improved circulation translates into better healing throughout the body. Dr. Inman explains that blood serves as both a delivery and cleanup system, transporting oxygen, glucose, amino acids, and immune cells to damaged tissues while removing metabolic waste. He also discusses how photobiomodulation may support mitochondrial signaling, regulate inflammation, and encourage fibroblast activity and collagen production. Using the analogy of a construction site, he describes circulation as the trucks delivering building materials and photobiomodulation as a way of helping the workers perform more efficiently. He highlights a meta-analysis involving 1,471 patients that reported a healing ratio of 1.93, suggesting higher observed healing rates in the light-treated groups.

Can Red Light Therapy Help with Cold Hands and Feet?

Time: 04:16

The conversation moves into a common everyday concern: chronically cold hands and feet. Dr. Inman explains that cold extremities can sometimes be associated with reduced peripheral circulation, where blood vessels narrow and restrict blood flow through a process called vasoconstriction. He discusses how red light therapy may support vasodilation and references research involving laser phototherapy and Raynaud's phenomenon. However, he also emphasizes that cold hands and feet are symptoms rather than diagnoses and may be associated with thyroid conditions, anemia, vascular disorders, or autonomic dysfunction. This section highlights the potential supportive role of light therapy while reinforcing the importance of identifying underlying medical causes.

Does Red Light Therapy Affect Blood Pressure and Heart Rate?

Time: 05:38

Mike raises another frequently asked question: can consistent red light therapy use help lower blood pressure or influence heart rate? Dr. Inman explains that the nitric oxide pathway provides a plausible biological mechanism, since relaxing blood vessels can influence vascular resistance and circulation. He discusses early human studies suggesting potential improvements in blood pressure and, in some cases, heart rate. However, he is careful to distinguish these preliminary findings from proven clinical outcomes, noting that a systematic review identified only four randomized human trials and that the available evidence was considered very low quality. This section offers a balanced perspective on an emerging area of cardiovascular research.

Can Red Light Therapy Protect Blood Cells from Oxidative Stress?

Time: 06:31

The discussion then turns to how red and near-infrared light may affect red blood cells under oxidative stress. Dr. Inman explains that red blood cells circulate for approximately 120 days, continuously transporting oxygen through narrow capillaries while being exposed to environmental and metabolic stressors. He describes laboratory research suggesting that photobiomodulation may help these cells maintain healthier conditions when exposed to oxidative challenges. He also revisits one of the podcast's recurring principles: more light does not necessarily mean better results. Because red light therapy follows a biphasic dose response, insufficient exposure may produce little effect, an appropriate dose may stimulate beneficial responses, and excessive exposure may reduce or potentially reverse those benefits.

Is There a Specific Protocol for Cardiovascular Health?

Time: 08:00

Mike asks whether there is an established red light therapy routine specifically designed to improve cardiovascular health. Dr. Inman explains that no standardized cardiovascular protocol has yet been established and that treatment cannot be accurately prescribed based on session duration alone. He emphasizes that the delivered dose depends on several factors, including wavelength, irradiance, distance from the device, exposure time, and the area of the body being treated. Understanding these variables is essential when evaluating research findings or comparing different treatment approaches. This section helps listeners understand why cardiovascular applications require more precise scientific investigation before universal treatment recommendations can be made.

How 850nm Near-Infrared Light Supports Blood Flow

Time: 08:50

One of the episode's most technical discussions focuses on the 850-nanometer wavelength commonly found in red light therapy panels. Dr. Inman explains that 850nm is classified as near-infrared rather than visible red light and can penetrate deeper into tissues. He describes its interaction with mitochondrial processes, particularly cytochrome c oxidase and nitric oxide signaling, which may influence the relaxation of vascular smooth muscle and improve local circulation. He also discusses human experiments reporting increases in oxygenated hemoglobin in illuminated tissues, suggesting improved local oxygen availability. This section connects the cellular mechanisms of photobiomodulation with measurable changes in blood flow and tissue oxygenation.

Closing

Time: 10:45

Mike concludes the episode by thanking Dr. Inman for explaining the relationship between red light therapy, circulation, and cardiovascular health. He encourages listeners to submit their questions through redlighttherapypodcast.com and acknowledges Platinum Therapy Lights for supporting the podcast. Looking ahead, Mike introduces the topic of the next episode, male vitality and natural approaches to improving performance. The conversation closes by reinforcing the importance of understanding both the potential benefits and current scientific limitations of red light therapy when considering its role in cardiovascular wellness.