PUFA (polyunsaturated fatty acids)

PUFA (polyunsaturated fatty acids) are fatty acids whose molecular structure contains multiple double carbon bonds, a configuration that makes them chemically unstable and highly susceptible to oxidative damage. 1 Peat argued that these fats are not essential nutrients but are instead fundamentally toxic, acting as a primary driver of degenerative disease. 2 He traced the widespread acceptance of their essentiality to a deliberate campaign by the seed oil industry, which revived a defunct scientific claim to market industrial byproducts as food. 7 The double bonds, while stronger than single bonds, are more reactive to oxygen, causing the fats to spontaneously generate free radicals that initiate a chain reaction of cellular damage. 1

The toxicity of PUFA is inseparable from its systemic hormonal and metabolic effects. Peat described a vicious cycle in which PUFA stored in fat tissue are liberated during stress, and unlike saturated fats which inhibit the stress response, free PUFA directly stimulate the release of ACTH, cortisol, adrenaline, and prolactin. 1 This creates a self-amplifying loop where stress releases more PUFA, which in turn amplifies the stress reaction, impairing mitochondrial energy production. 2 Dinkov has extended this by noting that PUFA's effects are almost indistinguishable from estrogen, capable of reproducing the effects of estradiol in experimental animals even without directly binding to the estrogen receptor, partly by activating the body's own estrogen synthesis. 8 Peat observed that PUFA lower metabolic rate and body temperature, a principle demonstrated by their role in inducing hibernation in animals and lowering body temperature in non-hibernating species like lizards. 6

PUFA accumulate selectively in tissues over the lifespan because the body preferentially oxidizes saturated fats for fuel, storing the more toxic unsaturated fats. 2 Peat noted that a newborn's brain is almost free of PUFA, but the concentration increases steadily with age, with old animals and humans exhibiting highly polyunsaturated brain tissue. 2 This progressive accumulation is linked to the lipofuscin/age pigment theory of aging, in which a toxic, indigestible material composed of cross-linked PUFA, proteins, and metals builds up in cells. 5 The peroxidation of these stored fats produces the protein damage often misattributed to sugar, with lipid peroxidation of PUFA causing this damage roughly 23 times faster than simple sugars. 6 This accumulation is accelerated by estrogen and, in turn, increases estrogenic activity, contributing to a declining metabolic rate and increased inflammation with age. 6

The pathological consequences of PUFA accumulation span virtually every major degenerative condition. Peat directly implicated them in arthritis, cancer, dementia, wrinkly skin, susceptibility to sunburn, and retinal degeneration, noting that they act as an antenna for ultraviolet light, exciting electrons that spread inflammatory damage. 2 In the brain, PUFA promote an excitatory, glutamatergic nervous state while impairing the quiescence essential for learning, contributing to seizures and excitotoxicity. 5 Peat highlighted that alcoholic cirrhosis occurs specifically in the presence of PUFA, and that saturated fats can reverse the condition even with continued alcohol consumption. 4 Dinkov summarized that the chronic low-grade inflammation driven by PUFA is the common denominator in cancer, cardiovascular disease, and neurological diseases like Alzheimer's and Parkinson's. 8

The body possesses a natural anti-inflammatory system that operates optimally in the absence of dietary PUFA. When carbohydrate is consumed, the body synthesizes its own saturated fats and produces the omega-9 series of fats, including mead acid, which have genuine anti-inflammatory effects. 11 Peat recommended minimizing PUFA intake by using coconut oil and butter, which contain only 1-3% PUFA and can exert an antioxidant effect that helps clear previously stored unsaturated fats from tissues. 2 He noted that the toxicity of ingested PUFA depends heavily on total calorie intake, as fats burned immediately for fuel cause relatively less harm than those placed into long-term storage, where they decompose and exert lasting damage on fat and brain tissue. 11