Stress

Stress is fundamentally a state of interference with energy production, a definition that unifies its diverse manifestations from emotional turmoil to metabolic dysfunction. 5 Hans Selye, the physiologist who pioneered stress research, demonstrated that stress is an inherent feature of life, but becomes pathological when an organism's metabolic energy supply is taxed too heavily, causing an adaptive response that eventually leads to impaired functioning and death. 4 Danny Roddy has emphasized that even the anticipation of a loved one returning home constitutes stress, and that complete freedom from stress is death itself. 2 The critical distinction lies between acute, adaptive stress and the chronic low-grade stress that characterizes modern life, which the body is not evolutionarily equipped to handle for extended periods. 8

The physiological stress response is orchestrated by counter-regulatory hormones, primarily cortisol and adrenaline, which are released to supply cells with emergency fuel during a perceived threat. 8 Cortisol's primary role is to prevent blood glucose from falling too low, and it achieves this by catabolically breaking down tissues—muscle, skin, brain, and liver—into amino acids, while adrenaline liberates free fatty acids from fat stores. 2 This mechanism is perfectly suited for brief, intense threats, such as escaping a predator, where the stress response resolves within minutes. 8 However, in the modern environment, stressors like financial instability, work pressure, and social isolation are persistent, leading to a state where baseline cortisol is constantly elevated. 2 Georgi Dinkov notes that a significant portion of the population are now "non-responders" to the dexamethasone suppression test, a clinical indicator of depression where the body fails to downregulate cortisol production even when a synthetic glucocorticoid is administered, signifying a maladaptive chronic stress state. 3

At the cellular level, metabolic stress is defined by a supply and demand mismatch where cells are deprived of oxygen and sugar, the fundamental anti-stress factors. 2 Suppressed thyroid function is a central driver of this state because it limits a cell's ability to produce carbon dioxide, which via the Bohr effect is essential for dissociating oxygen from hemoglobin. 1 Without adequate thyroid function and CO2 production, a person can be in a state of physiological stress even without an external stimulus, essentially hyperventilating at rest. 1 This interference with oxidative metabolism forces cells to rely on inefficient glycolysis, producing lactic acid and triggering the release of inflammatory cytokines and stress hormones. 9 Roddy has argued that ketogenic diets mimic this stress metabolism by voluntarily increasing the rate of lipolysis, a hallmark of aging and disease, which produces less carbon dioxide than glucose oxidation and slows the entire organism's renewal. 10

Chronic stress is increasingly recognized not merely as a nuisance but as a direct carcinogenic driver. Dinkov cites research showing that chronic stress directly drives liver cancer by shifting the metabolism of the amino acid L-tryptophan toward pathways that produce immunosuppressive and inflammatory metabolites. 6 The systemic effects are amplified by the interplay of stress substances; elevated cortisol is closely related to increases in estrogen and serotonin, which are associated with aggressive behavior and have been linked to population-level violence. 4 Children living in poverty exhibit higher cortisol levels, increasing their susceptibility to heart disease and cancer later in life, a phenomenon described as a short-term adaptive response that comes at a significant cost to long-term health and longevity. 4 Dinkov has stated that the price of chronic stress is infinite and cannot be compensated for by any amount of money or career success, though interventions like aspirin can partially block its effects by inhibiting the production of inflammatory mediators from polyunsaturated fatty acids. 7

Practical assessment of stress involves monitoring both pulse and temperature in tandem, as a high pulse coupled with low extremity temperature indicates a state driven by adrenaline rather than healthy thyroid function. 5 The overarching framework is a metabolic tug-of-war between energy production and stress substances, where maintaining thyroid function and stable blood sugar helps resist the destructive effects of cortisol, adrenaline, and the hormonal cascades they trigger. 11 Even seemingly minor dietary imbalances, such as a high phosphate-to-calcium ratio, can activate the parathyroid glands and constitute a form of stress, illustrating how the stress response is a complex biochemical web chronically activated by features of modern life. 11