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Fibrosis and Scleroderma

fibrosis, scleroderma, tissue scarring, organ fibrosis

12 passages
2 authors
1996–2021
Most-cited: Ray Peat

Fibrosis is an abnormal progression of normal tissue repair in which an energy-deficient, excitotoxic state drives the overproduction and rigidification of extracellular matrix, particularly collagen. Peat framed fibrosis not as a localized collagen disorder but as a general defensive reaction to excessive stimulation, oxygen deprivation, or chronic irritation, fundamentally linked to the processes of stress and aging. This maladaptive response occurs when cells, starved of oxidative energy, shift from invisible restoration to crude provisional repair, progressively replacing functional tissue with inert, contracted scar. The phenomenon is universal, manifesting as arteriosclerosis, liver cirrhosis, pulmonary fibrosis, and the tough, rubbery texture of aged meat.

The primary biochemical driver of fibrosis is the interaction between estrogen and polyunsaturated fatty acids (PUFA). Estrogen activates phospholipase to liberate arachidonic acid, causing capillaries to leak fibrin into the extracellular matrix, where it serves as a scaffold for fibrotic deposition. Peat cited Alejandro Lipschutz's demonstration that chronic low-dose estrogen produces fibromas throughout the body, and noted that retroperitoneal fibrosis is now recognized as estrogen-driven and treatable with antiestrogenic drugs. Simultaneously, PUFA and their peroxidation products act as immunosuppressive inflammatory signals, increasing vascular permeability and inhibiting the proteolytic enzymes needed for collagen remodeling. Ionizing radiation, heavy metals, and industrial particulates synergize with these factors by inflicting oxidative damage that converges on the same reductive stress and inflammatory cascade.

Scleroderma, or systemic sclerosis, is the prototypical fibrotic disease and exemplifies this energetic-steroidal pathogenesis. It disproportionately affects women during reproductive years, often begins with edema and Raynaud's phenomenon, and involves excessive collagen and mucopolysaccharide deposition that mirrors hypothyroid myxedema. Peat observed that mere lack of oxygen stimulates collagen formation, and that estrogen and adrenalin synergize to produce the vascular spasm seen in most patients. Hans Selye created an animal model by injecting iron to damage the liver—inducing estrogen excess—and then irritating the skin; vitamin E prevented the resulting sclerosis, implicating oxidative damage. Dinkov has extended this framework by highlighting that NAD+ depletion directly causes fibrotic tissue formation identical to human scleroderma, and that restoring energy reserves via nicotinamide can fully prevent the structural lesions, corroborating Peat's view that the disease is an energetic deficiency in disguise.

The resolution of fibrosis depends on restoring oxidative energy production and opposing the excitotoxic, estrogenic milieu. Peat emphasized that carbon dioxide, produced by efficient mitochondrial respiration, inhibits inflammatory cytokines, reduces vascular leakiness, and creates the high CO₂/O₂ ratio characteristic of tissues that regenerate without scarring. Progesterone opposes estrogen at multiple points, inhibiting the phospholipase that releases arachidonic acid and blocking the pro-fibrotic effects on connective tissue. Thyroid hormone (T3) accelerates the phagocytic removal of cellular debris essential for regenerative healing, while magnesium stabilizes ATP and prevents the intracellular calcium overload that drives calcification. Additional protective factors include vitamin E to reduce free radical peroxidation, glycine-rich proteins to provide inhibitory amino acids, and avoidance of tryptophan and arginine excess to minimize serotonin and nitric oxide. Dinkov notes that 5-HT2B antagonists like lisuride and ketotifen have been used successfully against fibrosis, further implicating serotonin in the fibrotic process.

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