Aldosterone

Aldosterone
Abbreviation	ALD, ALDO
Molecular formula	C₂₁H₂₈O₅
Type	Mineralocorticoid steroid hormone
Administration	N/A
Bioavailability	N/A
Synonyms	Aldocorten, Electrocortin, 18-Oxocorticosterone, 18-Aldocorticosterone
Source	Not supplemented - endogenous toxin, produced in the zona glomerulosa (outer layer) of the adrenal cortex.
Ray's verdict	Negative - an "endogenous toxin." Aldosterone and parathyroid hormone interfere with mitochondrial energy production the same way polyunsaturated fats do, intensifying hypothyroidism or glucose deficiency. People are now starting to speak of it as an endogenous toxin that activates so many stress reactions. Serotonin is a major factor in turning it on. Salt intake suppresses aldosterone (increased salt → lower aldosterone). Progesterone protects against aldosterone's harmful effects. New anti-aldosterone drugs for hypertension/heart failure are recognized for their similarity to progesterone.

Introduction

Aldosterone is a steroid hormone classified as a mineralocorticoid, produced primarily in the zona glomerulosa of the adrenal cortex. It is the principal hormone responsible for sodium retention and represents one of the body's key stress-adaptive hormones. In excess, aldosterone is increasingly recognized as an "endogenous toxin" that activates numerous inflammatory and degenerative stress reactions throughout the body.

Aldosterone functions within the broader renin-angiotensin-aldosterone system (RAAS), working alongside angiotensin II as a central mediator of blood pressure, fluid balance, and - unfortunately - chronic inflammation when chronically elevated.

"Aldosterone is part of the renin-angiotensin-aldosterone system, increasing your blood pressure and all of the stress-related, virus-related conditions."

History/Etymology

The name aldosterone derives from its chemical structure: "aldo-" refers to the aldehyde group at the C18 position of the molecule, while "-sterone" indicates its steroid nature. The hormone was identified and characterized in the mid-20th century, after progesterone's role in regulating salts, water, and energy metabolism was already well established.

"Even before aldosterone was identified, progesterone's role in regulating the salts, water, and energy metabolism was known, and after the functions of aldosterone were identified, progesterone was found to protect against its harmful effects."

Structure/Chemical properties

Aldosterone is a C21 steroid hormone (21 carbon atoms) belonging to the mineralocorticoid class. Structurally, it contains:

• A characteristic aldehyde group at the C18 position (distinguishing it from other corticosteroids)
• A hydroxyl group at C11
• A ketone group at C3
• An unsaturated A-ring

Aldosterone is relatively hydrophilic compared to steroids like pregnenolone, progesterone, and DHEA. This affects its cellular uptake - hydrophilic steroids like aldosterone and cortisol are less preferentially accumulated inside cells compared to more lipophilic steroids.

Aldosterone shares structural similarity with progesterone, which explains why progesterone acts as a natural aldosterone antagonist at the mineralocorticoid receptor. Synthetic aldosterone antagonists like spironolactone are essentially modified versions of the progesterone molecule. Spironolactone is "basically a diuretic, it's a mineralocorticoid receptor antagonist... progesterone is the same - actually progesterone has a higher affinity for the MR receptor than spironolactone."

Function/Mechanism of Action

Primary functions

Aldosterone's central regulatory function is sodium retention. When the body perceives sodium deficiency, low blood volume, or hypoglycemia, aldosterone is secreted to retain sodium in the kidneys, colon, sweat glands, and salivary glands.

"Aldosterone has the central function of making you not lose sodium so fast. Keeping the sodium inside your bloodstream helps the blood to absorb water so that it doesn't form edema."

However, this comes with significant trade-offs. The side effects of aldosterone include:

• Loss of potassium and magnesium - "Instead of losing sodium, you lose potassium and magnesium, and the loss of potassium and magnesium are very important in causing heart rhythm problems."
• Increased vascular permeability through VEGF (vascular endothelial growth factor)
• Inflammation and fibrosis in multiple organ systems

Triggers for aldosterone release

Several conditions stimulate aldosterone production:

1. Low sodium intake - "A restriction of salt in the diet causes more aldosterone to be produced"
2. Hypoglycemia - "Low blood sugar is enough to start the process signaling your kidneys to send out renin and starting the process to produce aldosterone"
3. Reduced blood volume - From dehydration, hyperventilation, or protein deficiency
4. Polyunsaturated fatty acids - "Arachidonic acid, even without being converted to prostaglandins, is an important activator of aldosterone synthesis"
5. Serotonin - Acts as a major stimulator of aldosterone release

Effects on mitochondrial energy production

One of aldosterone's most concerning effects is its direct interference with cellular energy production.

"Aldosterone and parathyroid hormones interfere with mitochondrial energy production the same way polyunsaturated fats do, intensifying the problem of hypothyroidism or glucose deficiency." - Ray Peat

This mitochondrial-blocking effect explains aldosterone's connection to numerous degenerative conditions. "The aldosterone directly blocks your mitochondrial energy production and increases the parathyroid hormone activity, which itself functions by blocking your mitochondrial oxidation and making up for it with glycolytic energy production, which shifts you over into the reductive stress, the failure of oxidation."

Relationship with other hormones

Aldosterone works synergistically with other stress hormones:

• Parathyroid hormone (PTH) - Both block mitochondrial respiration and promote lactic acid production
• Cortisol - Shares similar effects through glucocorticoid and mineralocorticoid receptor crosstalk
• Estrogen - Increases aldosterone production; "Estrogen is also increased in pattern baldness, also appears to increase aldosterone" (Danny Roddy, "Male Pattern Baldness Myth")
• Prolactin - "All three hormones - estrogen, prolactin, and aldosterone - appear to work together to waste salt in the urine but retain it in the tissues" (Danny Roddy, "Male Pattern Baldness Myth")

Medical uses/Effects

Conditions where aldosterone is elevated

Elevated aldosterone (hyperaldosteronism) is associated with:

• Hypertension
• Heart failure
• Pattern hair loss - Elevated levels of aldosterone are seen in men and women with pattern baldness
• Depression - "The use of bright light (which suppresses melatonin) to treat depression probably helps to inhibit the production of aldosterone, which is strongly associated with depression"
• Kidney disease
• Increased cancer risk - Chronic hyperaldosteronism has been associated with an increased cancer risk

Aldosterone antagonists as treatment

Aldosterone antagonists have become recognized therapies for multiple conditions. "Aldosterone antagonists are now being recognized as effective treatments for hypertension, water retention, congestive heart failure, arrhythmia, diabetes, kidney disease, and a great variety of inflammatory problems."

Pharmaceutical options include:

• Spironolactone - A synthetic progesterone derivative
• Eplerenone - A more selective mineralocorticoid antagonist

Natural antagonists include:

• Progesterone - "Synthetic drugs to antagonize aldosterone are most effective when they are most like natural progesterone... progesterone, the 'antifibromatogenic steroid,' should be helpful for those problems that have been considered irreversible."
• Pregnenolone - "Pregnenolone (just like progesterone) is a potent aldosterone antagonist in low nanomolar concentrations"

Anti-fibrotic effects of aldosterone reduction

Since aldosterone promotes fibrosis, its antagonism helps prevent and potentially reverse fibrotic changes: "Besides inflammation, aldosterone leads to fibrosis and prolonged heart failure and vascular and kidney disease and so on that lead to fibrosis, lung disease. Everywhere that water retention and inflammation start, they tend to end up with fibrosis."

Dosing

Substances that lower aldosterone

Rather than dosing aldosterone itself (which would be harmful), the therapeutic goal is typically to lower aldosterone through:

1. Adequate sodium intake - Increased salt in the diet causes aldosterone to decrease

Ray noted one population consuming "at least 30 grams of salt per day (about 5 teaspoons)" with "no hypertension at all even among the oldest people."

1. Vitamin D - Maintaining levels of 50-60 ng/mL helps suppress the RAAS system
2. Calcium - Calcium works with vitamin D to hold down your aldosterone
3. Progesterone - Acts as a natural mineralocorticoid antagonist. In Hans Selye's experiments, "progesterone supplement totally replaced all of the adrenal hormones, aldosterone and cortisol in particular" in animals without adrenal glands.
4. Aspirin - "Aspirin, which is antilipolytic, decreasing the release of free fatty acids... lowers the production of stress-induced aldosterone, and helps to lower blood pressure, if it's taken in the evening"
5. Cyproheptadine - Through its anti-serotonin effects, it "can reliably lower aldosterone"

Side/Adverse effects

Effects of aldosterone excess

Chronic elevation of aldosterone produces numerous harmful effects:

Cardiovascular:

• Hypertension
• Heart failure - "Aldosterone is widely recognized as one of the primary contributors to heart failure" (Georgi Dinkov, Generative Energy podcast #22)
• Vascular calcification
• Increased blood vessel permeability

Metabolic:

• Insulin resistance - "Aldosterone secretion increases during the night... it inhibits energy metabolism, increases insulin resistance"
• Contribution to diabetes - "Aldosterone appears to contribute to the hyperglycemia of diabetes itself, and not just to its complications, by interfering with the interactions of insulin and cortisol"

Mineral Imbalances:

• Potassium depletion
• Magnesium depletion - Contributing to vasoconstriction, inflammation, and bone loss
• Paradoxical intracellular sodium accumulation despite sodium retention

Tissue Degeneration:

• Fibrosis of heart, kidneys, lungs, liver
• Tissue "brittleizing" - Ray called it the major brittleizing hormone

Other Effects:

• Stimulation of cell division through polyamine production
• Nocturnal stress - Aldosterone rises during the night, contributing to catabolic processes and poor sleep
• Bone loss - Works synergistically with parathyroid hormone to promote osteoporosis

The mocturnal rise

Aldosterone naturally rises during the night, which is problematic: During aging, salt restriction can produce an exaggerated nocturnal rise in aldosterone. This nocturnal elevation contributes to the fact that night and winter are where most aging degeneration takes place.

Protective measures before bed include salty soup or milk to suppress the nocturnal rise of aldosterone and other stress hormones.