Salt, GAGs and the Missing Piece of Lipedema
Salt is my guilty pleasure. Here is what I learned about it and lipedema tissue.
I love salt. It is the one thing on my plate I reach for without thinking. Flaky salt on tomatoes, salt on good bread with butter, salt in the water when I cook. If I have a guilty pleasure with food, this is it..
So I want to be honest before I write anything else. Salt is not one of my triggers. When I eat too much of it my legs do not light up with the deep, tender, pressing pain I know from sugar, or from certain hormonal weeks when my body seems to work against itself. I can still swell and feel heavy. That happens to me for many reasons. But the sharp inflammatory reaction, the kind that leaves the tissue sore to the touch, does not come from salt for me.
I could have left it there. My body was not asking me to think about salt. But lipedema has taught me that the quiet things are often the ones worth understanding, and salt turned out to be one of the most interesting quiet things in this disease. What it is built upon reaches straight into the part of lipedema that I have come to believe matters most, which is the tissue around the fat rather than the fat itself.
Where this started for me
The first time salt and lipedema came together in my mind was in a webinar with Dr. Karen Herbst. I watched it years ago now. It must have been not long after my own surgery period ended in late 2022, because I remember watching it in that strange recovery stretch when I was reading and listening to everything about this disease that I could get my hands on.
Herbst said something that reorganised how I thought about my own legs. Lipedema, she explained, is not only a disorder of fat. It is a disorder of the loose connective tissue, the living scaffolding that sits between and around our cells. And that scaffolding, she said, has a particular relationship with salt.
One idea about GAGs
To follow why, you need one idea, and it is not a hard one.
The connective tissue in our bodies is filled with long molecules called glycosaminoglycans. The name is a mouthful, so most people shorten it to GAGs. You can picture them as long sugar chains woven all through the tissue. Two of them matter for this story, hyaluronan and chondroitin sulfate, and the important thing about them is that they carry a strong negative electrical charge along their whole length.
Salt, once it is inside the body, splits into charged pieces. Sodium is the positively charged one. Opposite charges pull toward each other, so sodium is drawn to the negatively charged GAGs and collects around them. And where sodium collects, water tends to be pulled in as well. Connective tissue that is rich in these molecules therefore holds on to more sodium and more water than tissue that is not.
Now bring lipedema into it. The tissue in lipedema is not built like ordinary tissue. Studies describe a remodelled matrix with more of these GAG molecules, more fibrosis, which is a kind of internal scarring, and more fluid held in the spaces between the cells. Put plainly, the lipedema matrix is by its very construction better at holding sodium and water. That was the sentence Herbst planted in my head, and it has stayed there ever since.
The part that surprised me
There is a second piece that makes this stranger and more interesting than I first expected. For a long time medicine taught that salt lives in the blood, and the kidneys deal with whatever is left over. In the last fifteen years or so that picture has changed. We now know that sodium can also be stored inside the connective tissue itself, in the skin and the fascia, held against those same charged GAGs. Some of this stored sodium simply sits there quietly, without dragging along the amount of water we used to assume. Immune cells and the lymphatic system, the drainage network of the body, help manage these stores.
This is why lipedema is such a natural place to ask the question. The three parts of the body most involved in storing and clearing tissue sodium, the connective tissue, the immune cells, and the lymphatic system, are all altered in lipedema. It would be strange if sodium handling turned out to be completely normal in a disease that touches all three at once.
If you’d like full access to the entire LipedemaScience library, consider becoming a member. LipedemaScience is where you’ll find the articles you didn’t even know you were looking for, written by food scientist CarinaW, who was diagnosed with lipedema at a Norwegian hospital in 2012. With a background in human nutrition, food science, and research on human cells, bacterial DNA, and peptides, she translates complex science into practical knowledge for women living with lipedema.
