interstitium, acupuncture, fascia, interstitial fluid, medicine, anatomy, meridians

Last week, a number of patients alerted me to a NY Times article about a breakthrough in medicine. I include the link to the article below, but for those without NYT subscriptions, I summarize this exciting new information here.

In recent years, the discovery of what is potentially a new “organ” has been verified. The so-called “interstitium” is made of a collagenous lattice-like structure that exists in the body’s fascia, or connective tissue. Fascia, a fibrous tissue made of protein, “enwraps and undergirds” the entire internal anatomy- that is, nerves, blood vessels, muscle, bone and organs. The fluid that flows through these interstitial spacesis largely comprised of hyaluronic acid and acts as a gel-like medium throughwhich water can be absorbed and stored, and through which nutrients can flowand re-enter the circulatory or lymphatic systems. The interstitium is describedlike a sponge: the sponge itself is the fascia, (collagen and elastin), and thesoaked gel-like fluid floating through it is the interstitial fluid.

In the past, whenever scientists studied samples of thehuman body, they removed tissue, stained it, and created a flat slide thatcould be examined with a microscopic lens. But the process eliminated thefluid-filled spaces of the interstitium, so no one ever saw this comprehensive network.The circulatory system and the lymphatic system were the only two documented roadwaysfor transportation of fluids. This third network of fluid circulation is now describedas a “conduit” between the skin and fascia and is far reaching throughout thehuman body’s landscape.

In one experiment mentioned in the article, researchers studiedthe pathways that dye could travel through a human body after being injectedinto a specified acupuncture point. The dye migrated through the body along themeridian’s path. This demonstrates that the interstitium is precisely that conduitwe know as the meridian network, through which qi flows. For millennia, Chinesemedicine has described the innervating conductivity through a web that connectseverything in the body.

Another concept in Chinese medicine that is often overlooked is the concept of “Body Fluids” and its emphasis as an essential substance integral to  health. It is closely connected with the flow of blood and qi. Traditionally,the Body Fluid category includes saliva, digestive juices, liquid in joints,tears, nasal mucous, sweat and urine. These fluids are thought to moisten andnourish the body (specifically muscles, skin, and joints, the brain and marrow,orifices, and so forth) through coordinated activities of the internal organs.Given what we now know, the interstitial fluid would also fall under thecategory of Body Fluids.

Because of the implications of this discovery and the impactthe interstitium has on the health and healing—and potential mechanisms for disease process and for cures—it also opens up more questions about acupuncture: notonly for more explanations of how it works, but how it might be betterutilized, appreciated and integrated into modern medical protocols fortreatment, especially for issues that have to current cure. The chasm betweenwestern and eastern medicine has just become smaller.

NY Times article link

https://www.nytimes.com/interactive/2026/05/11/magazine/interstitium-anatomy-acupuncture-medicine.html?smid=em-share

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