Are Acupuncture Meridians Real?
What Modern Science Has Discovered

For centuries, Traditional Chinese Medicine (TCM) has described a network of invisible pathways in the body known as meridians. These channels are said to conduct Qi (vital energy) and link together acupuncture points used in treatment. While skeptics have long dismissed meridians as metaphorical or unscientific, modern imaging technologies are beginning to offer surprising evidence that these ancient maps may reflect real, physiological structures.

One of the earliest and most talked-about studies came from France in the 1980s. Doctors Jean-Claude Darras and Pierre de Vernejoul injected a radioactive tracer (technetium-99m) into acupuncture points on the body. Using a gamma camera, they observed that the tracer didn’t just diffuse randomly or travel through blood vessels. Instead, it moved slowly along lines that matched the traditional acupuncture meridians. In contrast, when they injected the tracer into nearby non-acupuncture points, it simply spread out in all directions or drained quickly through the bloodstream. Their results suggested the presence of a separate kind of pathway in the body—one that had never been mapped by Western anatomy.

Not everyone agreed with their conclusions. A separate group of researchers in France replicated the radioactive tracer experiments but concluded that the lines might simply be small veins near the skin. Still, other teams weren't so sure. In Spain, Dr. Francisco Kovács and his colleagues conducted animal studies and found that these meridian-like paths could be interrupted by making small cuts in the skin. If the tissue was reconnected (even with a temporary gel), the path could be restored. This behavior didn’t match what would be expected from blood or lymphatic flow and suggested something quite different—a functional tissue pathway rather than a traditional vessel.

More recently, researchers have tried using fluorescent dyes instead of radioactive materials. In a 2021 study, a team led by scientists from China and Harvard Medical School injected dye into specific acupuncture points along the Pericardium meridian on the forearm. In nearly 80% of trials, the dye traveled along a thin line that matched the expected meridian path and even pooled at another acupuncture point near the elbow. When dye was injected just one centimeter away from the acupuncture point, no such line appeared. Ultrasound scans showed no corresponding blood vessels, but the dye appeared to move along connective tissue planes—proposing that fascia, the body’s network of connective tissues, may be the missing link.

These findings don’t prove that Qi flows through the meridians, nor do they explain every aspect of how acupuncture works. But they do support the idea that acupuncture points lie along real, physical pathways—possibly channels in the body’s connective tissues or low-resistance interstitial planes that conduct subtle signals. Scientists are now exploring whether electrical properties or fluid flow along these channels might explain how acupuncture affects the body.

In short, meridians may not be “imaginary lines” after all. Thanks to modern imaging, we are beginning to glimpse what ancient Chinese doctors described thousands of years ago. The exact nature of these pathways is still under investigation, but one thing is increasingly clear: acupuncture meridians may represent a previously overlooked aspect of human anatomy—waiting to be better understood.

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—Qi Journal 2025

Endnotes:

1. Darras, J.-C., de Vernejoul, P., et al. "Visualization of acupuncture meridians using radioisotopes." Bulletin de l'Académie Nationale de Médecine (1985).
2. Lazorthes, Y., et al. "Acupuncture meridians and radiotracers." Pain, 40(1):109–112 (1990).
3. Kovács, F.M., et al. "Migration pathways of hypodermically injected technetium-99m in dogs." European Radiology (2000).
4. Li, T., et al. "In Vivo Visualization of the Pericardium Meridian with Fluorescent Dyes." Evidence-Based Complementary and Alternative Medicine, 2021.