# Edema

Category: Conditions

Also known as: fluid retention, swelling, oedema

Edema is fundamentally a disorder of water distribution driven by estrogen dominance and low thyroid function, where water falls out of cells and accumulates in the extracellular spaces rather than remaining properly bound within the cellular structure. Peat argued that the…

9 passages · 1 author · 1997–2021 · Most-cited: [Ray Peat](https://bioenergeticoracle.com/md/voices/ray-peat/index.md)

Canonical page: https://bioenergeticoracle.com/concepts/edema

## Synthesis

**Edema** is fundamentally a disorder of water distribution driven by *estrogen dominance* and **low thyroid function**, where water falls out of cells and accumulates in the extracellular spaces rather than remaining properly bound within the cellular structure. [Source 1, 3] Peat argued that the organism's protein matrix changes its electrical properties and water-holding capacity according to the degree of acidity and alkalinity, with **alkalinity** making the organism retain water and acidity causing it to release water. [Source 1] The energy produced by oxidative metabolism—primarily burning sugar in the presence of oxygen—regulates this acid-alkaline balance, and when metabolism fails, hormonal imbalances shift the system toward an edema state. [Source 1] The hormone most responsible for keeping cells hydrated and functional is **thyroid hormone**, which enables oxygen use and maintains protective hormones such as progesterone, pregnenolone, testosterone, and DHEA. [Source 1]

The central hormonal mechanism involves the conversion of protective steroids into estrogen under stress. Peat explained that under stress or injury, some testosterone or DHEA changes into estrogen, which directly alters the ability to regulate water and tends to create the edema state. [Source 1, 4] While a monthly surge of estrogen serves a physiological function in preparing tissues for pregnancy and lactation, persistent estrogen elevation causes water to escape cellular control throughout the organism, producing the swelling, headaches, and nervous tension associated with PMS and pregnancy complications. [Source 1, 4] Estrogen causes the liver to synthesize less **albumin**, partly by destabilizing and degrading messenger RNA, and when there is insufficient albumin in the blood, water moves from the bloodstream into the tissues. [Source 6] Peat observed that progesterone and pregnenolone can produce visible reductions in edematous tissue within an hour, and he believed one of their first sites of action is the albumin molecule itself, causing its conformation to open so that it more strongly binds water molecules, thereby changing the blood's *oncotic pressure* and drawing water back into the capillaries. [Source 6]

Sodium plays a critical and widely misunderstood role in edema. Peat maintained that edema often involves a *loss of sodium and albumin* in the urine, with both entering the tissues along with water. [Source 2] Adequate sodium stabilizes albumin in the bloodstream, attracting water out of dependent tissues and circulating it through the kidneys for elimination. [Source 2] The physiological loss of sodium occurs when energy metabolism fails, as in diabetes, hypothyroidism, hyperestrogenism, and starvation, conditions that share an increased level of **free fatty acids** in the blood, which impair glucose use. [Source 9] Peat distinguished between typical pitting edema and the firm, non-pitting swelling that results from sodium deficiency causing leakage of albumin, or from hypothyroidism causing accumulation of sugar-containing protein—both of which make water stick around tissue cells. [Source 7] He documented that women with toxemia of pregnancy given extra salt rather than diuretics experienced rapid normalization of blood pressure and resolution of toxemia. [Source 7, 9]

The consequences of edema extend far beyond cosmetic concerns. Peat identified edema as a central factor in aging, shock, hypertension, cancer, and heart failure, noting that relieving edema is probably essential to solving those problems. [Source 3] The aging process itself is essentially a loss of water, with a baby's extremely high water content declining from roughly 80 percent to perhaps 55 percent in very old age, and function decreasing along with the water. [Source 4] When thyroid function is low, muscles swell with very little effort, and the resulting energy failure leads to breakdown of barrier function, leaking of substances, and eventually atrophy. [Source 8] Peat recommended that most edemas can be corrected with **thyroid**, adequate protein, sodium, and magnesium, with progesterone synergizing by acting on mitochondria to increase respiratory efficiency and on structural proteins to change their ionic affinities. [Source 5] He also noted that simply salting food to taste prevented monthly edema problems in women who had previously restricted salt, and that the body adjusts completely to massive changes in salt consumption within two or three days when the person is otherwise well nourished. [Source 5, 9]

## People also ask

### How does estrogen contribute to the formation of edema?

Peat argued that under stress, protective steroids convert into estrogen, which alters water regulation and causes the liver to produce less albumin. With insufficient albumin in the blood, water moves from the bloodstream into the tissues, creating the edema state.

### Why does Peat recommend salt for some types of edema?

The corpus describes how edema often involves a loss of sodium and albumin in the urine, with both entering the tissues. Adequate sodium stabilizes albumin in the bloodstream, attracting water out of tissues and circulating it through the kidneys for elimination.

### What is the relationship between thyroid function and water distribution in the body?

Peat argued that thyroid hormone enables oxygen use and maintains protective hormones, keeping cells hydrated. When thyroid function is low, energy metabolism fails, causing water to fall out of cells and accumulate in extracellular spaces, leading to swelling and eventual tissue atrophy.

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## Cited passages

Passage numbers match the `[Source N]` markers in the synthesis above.

### Source 1 — Voice of America: Misconceptions about Nutrition - Sharon Kleyne + Ray Peat

Ray Peat · Interview · 2013 · http://l-i-g-h-t.com/files/voice-of-america-water.mp4

> **Ray Peat:** The organism, the structure is mainly a system of protein molecules and fat and nucleic acids, DNA. Those things are in a way peripheral to the basic protein structure, and the protein changes itʼs electrical properties according to the chemical reactions going on inside. And it can change its acidity or alkalinity according to the metabolism and what youʼre eating. Ordinary, like a sponge or a bowl of jello, any system with a lot of protein in it, will change the way it holds water according to the degree of acidity and alkalinity. Acidity makes it give up water, alkalinity makes it retain water. The protein itself is on the acidic side but it associates with alkaline metals like sodium, potassium, calcium and magnesium, and these neutralize the acidity of the proteins and they and the metabolism (basically burning sugar in the presence of oxygen) --that energy is what regulates the balance of acidity and alkalinity and in turn its the alkalinity essentially that makes the organism retain water. So edema, where you free or fingers swell up, that is regulated. Itʼs a result of bad metabolism letting your hormones get out of balance - changing the acidity and alkalinity of the whole organism. So instead of the water staying inside cells where it belongs, it falls out of cells and collects in your feet and fingers or whatever is downhill under gravity. The hormone that is most responsible for keeping the cells hydrated and functional - demonstrating the processes that Szent-Gyorgi went around the country demonstrating in lectures with fluorescent lights showing that the muscle would become luminous when it contracted and dark when it was relaxed. These changes in the state of water are constantly being regulated mainly by the thyroid hormone letting us use oxygen to produce energy. And the thyroid maintains the protective hormones such as progesterone, pregnenolone, testosterone, DHEA.

### Source 2 — One Radio Network: Ray Peat with Patrick Timpone — May 17, 2021

Ray Peat · Passage · May 17, 2021

> **Patrick Timpone:** All right. This is interesting. Okay. This is from Elena. She says, I am 55 years old in good health, no issues, but every now and then I get swelling, what is called edema, in my feet, sometimes one, sometimes two. It doesn't last very long, but I want to know the root cause of this. If Dr. Peat can tell me, why is it doing this? What's that hooked up to? Is it a kidney thing, edema?
>
> **Ray Peat:** Yeah, that's part of it. Sometimes it's... A very simple thing in your diet corresponding to your hormones. And at the age of 55, people are still cycling. It doesn't matter that you're not having visible menstrual cycles, but still the brain and the pituitary tend to cycle. And so lots of women in their 50s will have the typical premenstrual water retention symptoms. Sometimes all that's needed is to salt your food to taste. In pregnancy, they used to restrict sodium so they wouldn't gain weight during pregnancy. And the problem was that the high estrogen people, who were usually low thyroid, weren't able to retain the sodium in their kidneys. and their body fluids became diluted, and the amount of albumin in the blood tends to be lost when you don't have enough sodium to hold the conformation of the albumin molecule proper. The edema goes with loss of sodium and albumin in the urine. and also the entry of albumin and sodium into your tissues with the water. But if you had more sodium available running through your system, that would stabilize the albumin in your bloodstream and attract the water out of your tissues such as your feet where it goes by gravity and circulate the water through your kidneys. so that the water could be moved out of your body without losing the combination of sodium and magnesium. Getting the estrogen down makes you able to produce more albumin and to retain more sodium so that the water is properly distributed, pulling it into your bloodstream. and carrying it to the kidneys.

### Source 3 — Townsend Letter — January 2000

Ray Peat · Newsletter · Jan 1, 2000

> # Edema, Estrogen, and Aging: A Universal Problem, and Better Therapies
>
> Before talking about the harmful effects of edema, and of the things that cause edema, and of the things that can remedy the various edemas, I think it’s necessary to look at a few recent events in the very long history of medicine’s intervention in this problem of excessive tissue water. Otherwise, I don’t think the great importance of edema, and its fundamentally “estrogenic” nature, will be clear. Aging, shock, hypertension, cancer, heart failure, and many other biological problems involve edema as a central factor, and relieving the edema is probably an essential part of solving those problems.
>
> > Carbon dioxide and estrogen are important in the regulation of water, which is a major problem in stress and aging.
>
> Some people have defined “homeostasis” as maintaining a consistency in the things dissolved in the body's water. Physiologists have tried to explain how homeostasis is maintained, but they have had the greatest difficulty with understanding the water itself, and the things which allow the body to maintain the right amount of water in the various compartments of the body. Edema (“an abnormal collection of liquid”) isn’t a sophisticated concept, and is generally used interchangeably with “water retention” and “swelling.”
>
> Many people think of edema as an aesthetic problem: They don’t like the appearance of fat, swollen ankles, puffy eyelids, and soggy-boggy tissues in other areas. Swollen breasts and uterus can cause pain, and often occur premenstrually along with more generalized water retention.
>
> > Estrogen’s role in edema is understood by many women, but therapies have generally been directed toward the water itself, with empirical diuretics, because edema’s causes aren't explained in medical texts.
>
> Deliberate distortion by the drug industry of the issues involved began in the 1950s, when the sale of new patented diuretics (replacing traditional diuretics) began in an atmosphere in which estrogen was being given to pregnant women, to prevent various complications of pregnancy (which in fact were caused by excessive estrogen). Excess estrogen as the cause of toxemia couldn’t be discussed, and the diuretics were sold as additional tools for controlling pregnancy-associated water retention, weight gain, high blood pressure, and damage to the fetus.

### Source 4 — Voice of America: Misconceptions about Nutrition - Sharon Kleyne + Ray Peat

Ray Peat · Interview · 2013 · http://l-i-g-h-t.com/files/voice-of-america-water.mp4

> **Ray Peat:** Under stress, or injury, some of the testosterone or DHEA changes into estrogen, which changes the ability to regulate water. It tends to create the edema state. But the edema reverses the functional state of the organism momentarily to put it back into a growth condition so that it can renew the cells - thatʼs its function: once a month there should be a surge of estrogen in a womanʼs tissues to prepare her for pregnancy and lactation, but if the estrogen persists too long, then the water is out of control throughout the organism and it tends to cause the swelling, headaches, nervous tension, swollen feet and so on associated with PMS, pregnancy problems and so on. Thyroid and progesterone are the most powerful hormones in preserving the proper retention of water in cells..not too much, not too little.

### Source 5 — Townsend Letter — January 2000

Ray Peat · Newsletter · Jan 1, 2000

> In physiology lab classes, professors sometimes have one group of students drink a quart of ordinary water at the beginning of the class, while another group drinks a quart of isotonic saline (containing roughly a rounded teaspoonful of salt). Everyone measures their urine output over the next few hours, and by the end of the class, it turns out that those who drank the plain water produced about a quart more urine than those who drank the slightly salty water. The conclusion is obvious: For every 9 grams of salt, we retain a quart of water. That’s an unfortunate experiment, though, because it creates such a clear impression of salt’s immediate effect, but provides no information at all about its longer-range effects.
>
> Recently, a British physician, from Mongolia or northern China, studied the incidence of hypertension in her native region, where people consume at least 30 grams of salt per day. She found no hypertension at all, even among the oldest people. In my experiments, it has taken the body only two or three days to adjust completely to a massive change in salt consumption. Many hormones adjust quickly to retain or release sodium, according to the amount consumed, if the person is otherwise well nourished. Hypothyroid people, however, are unable to maintain a normal sodium concentration in their body fluids even when they increase their salt consumption.
>
> Thyroid, protein, sodium, and magnesium will correct most edemas. Progesterone, acting on mitochondria to increase respiratory efficiency, and on structural proteins to change their ionic affinities, synergizes with the other natural factors to correct permeability and water regulation. One of the first people I saw use progesterone was a woman who (after being studied at the Mayo Clinic and many other places) believed she had Bright’s disease, and habitually produced an extremely small quantity of urine. A few hours after taking just a few milligrams of progesterone, she telephoned to report that she “had to stop at every gas station on the way home,” because she was forming urine at such a great rate.
>
> Increased perfusion of the kidneys is one of progesterone’s normal functions, that accounts for its ability to prevent or cure “toxemia” of pregnancy.

### Source 6 — From PMS to Menopause: Female Hormones in Context

Ray Peat · Book · 1997

> **Ray Peat:** Then, I repeatedly saw physical changes in other people that were visible within an hour, and that involved a sudden movement of water out of edematous tissues. In many people with damaged joint cartilage (confirmed by various types of examination, including arthroscopy), the joints became mobile in an hour, and by the next day, the defect no longer existed. A man who was purple from emphysema changed color within a few hours, and within a few days was going to work. The bulging eyes of exophthalmic Graves' disease receded into their sockets noticeably within an hour, and were normal the next day. Simply improving the circulation couldn't have done those things. Opposing estrogen's edema-promoting action was involved, but I couldn't imagine any mechanism that could explain such rapid movement of water from the swollen tissue into the blood stream. One of estrogen's effects is to lower the amount of albumin in the blood. Estrogen causes the liver to synthesize less albumin, partly by causing the messenger RNA to be destabilized and degraded. (Iron can have some similar effects on liver RNA.) When there isn't enough albumin in the blood, water moves from the blood into the tissues. Albumin binds oily substances, and its conformation seems to be opened when it binds them. Progesterone is known to adsorb strongly to proteins- -it has been called a "cardinal adsorbant," meaning that it can bind in ways that cause the protein's adsorptive capacity to change. I believe that progesterone and pregnenolone oppose estrogen in many ways, but the amazing speed with which they can cause major structural changes in the soft tissues convinces me that one of their first sites of action is the albumin molecule, causing its conformation to open in such a way that it is able to more strongly bind water molecules. This physical change in albumin would change the blood's osmotic/oncotic pressure, causing water to flow into capillaries.

### Source 7 — One Radio Network: The Goods

Ray Peat · Interview · May 21, 2019

> ## Hydration, Salt, and Edema
>
> **Patrick Timpone:** What is your take on water? We hear about drinking half an ounce of water for every pound of body weight. What does your research show regarding dehydration?
>
> **Ray Peat:** Salt is one of the important factors in keeping us hydrated. In the 50s, drug companies came out with diuretic pills to make you lose water, and they sold them to pregnant women to prevent water retention. It turns out that is a very bad idea. During pregnancy, you have to retain water in your bloodstream and expand your blood volume tremendously to take care of the growing fetus and new systems of blood vessels. What retains water in the bloodstream is largely the protein albumin. But albumin doesn't retain water unless there is an associated cloud of sodium atoms attached to the negative charges on the albumin protein. The combination of sodium and albumin retains water within the system. If you take a diuretic that makes you lose sodium, the water that goes with the sodium reduces the blood volume and reduces the ability of the albumin to keep water from going out into your tissues. Without enough sodium, the albumin itself goes out of the blood vessels into your tissues, creating a kind of edema and swelling. It isn't the typical pitting edema; it is very firm, resembling the myxedema of hypothyroidism. It is caused by the lack of sodium needed to keep water in the proper compartments. You dehydrate your circulatory system but waterlog the functioning tissues. In experiments, researchers gave women with toxemia of pregnancy—who had great water retention and high blood pressure—extra salt instead of diuretics. With this supplement (in one case six grams a day, in another 20 grams), their blood pressure quickly came down to normal and their toxemia was cured.

### Source 8 — Ask the Herb Doctor: Brain "Barriers"

Ray Peat · Interview · Oct 18, 2019

> **Andrew Murray:** (22:46) And this would be through edema, water retention.
>
> **Ray Peat:** (22:49) Yeah. The swelling of the muscle and the amount of exertion that it takes to injure the muscle. Like if you lift a barbell too many times, your muscle will get hot and swell up, but if your thyroid is low, it gets hot and swells up with very little effort or no effort.
>
> **Andrew Murray:** (23:14) That makes me think again, a little bit off the beaten track here. For the purpose of the show's questions, I wanted to get through to you, but chronic wasting disease, that is an interesting, an interesting definition of a process that they want to say is prevalent in the animal population here in, in the States. I know in England, the Creutzfeldt Jakob disease in cows, bovine spongiform encephalopathy and that whole prion supposedly based disorder that again, in terms of chronic wasting, that whole physiology there seems very much like a very energy wasting process.
>
> **Ray Peat:** (23:56) Yeah. The thyroid hormone is our basic anabolic hormone.
>
> **Andrew Murray:** (24:01) Yeah. Okay. Okay. So do you think, I mean, I wasn't even going to ask this question too, but in terms of chronic wasting disease, what do you think? What do you think is probably the main deficit there? You think that's a deficit in energy production based on thyroid or.

### Source 9 — When Energy Fails

Ray Peat · Newsletter · Jul 1, 2013

> This oncotic pressure causes any excess extracellular water to be attracted into the blood vessels, preventing edema while maintaining the blood volume. When there is too little sodium, the albumin molecule itself easily leaves the blood stream along with the water.
>
> Instead of considering the significance of sodium's effects on albumin, aldosterone, and VEGF, textbooks have often talked about the factors that “pump” sodium, and factors that specifically regulate the movement of water. Experiments in which an excess of aldosterone is combined with a high salt intake produce increased blood pressure, and—by invoking various genes—salt is said to cause hypertension in certain people. This reasoning is hardly different from the reasoning of the drug companies in the 1950s who said that since women with toxemia have hypertension and edema, they should be treated with a diuretic and a low salt diet, to eliminate water and to reduce blood pressure.
>
> The physiological loss of sodium occurs when energy metabolism fails, as in diabetes, hypothyroidism, hyperestrogenism, and starvation. What these conditions have in common is an increased level of free fatty acids in the blood. Increased free fatty acids impair the use of glucose. The consumption of carbohydrate, like an increase of thyroid hormone, insulin, or progesterone, increases the retention of sodium; fructose is the most effective carbohydrate.[[51](#ref051)]
>
> The loss of sodium is often accompanied by the retention of water, reducing the osmotic pressure of the body fluids. The leakiness of blood vessels allows the extracellular fluid volume to increase, as understood in the standard definition of edema. However, when this fluid is hypo-osmotic, it will enter cells, causing them to swell. Cell swelling excites cells,[[2](#ref002), [3](#ref003)] and can kill them if they are unable to produce enough energy to restore their original volume, by measures including the excretion of amino acids and potassium. Both low sodium (hyponatremia) and low osmotic pressure stimulate the adrenergic nervous system.
>
> The increase of adrenalin, caused by a deficiency of sodium, is one of the factors that can increase blood pressure; if the tissues' glycogen stores are depleted, the adrenalin will mobilize free fatty acids from the tissues, which tends to inhibit energy production from glucose, and to increase leakiness.

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