Anxiety is a state of heightened threat perception, nervous system arousal, worry, vigilance, and physical tension that involves coordinated activity between the brain, autonomic nervous system, endocrine system, immune system, and gut-brain axis. Biologically, anxiety is associated with limbic system activation, altered prefrontal regulation, sympathetic nervous system signaling, catecholamine turnover, cortisol rhythm changes, inflammatory signaling, oxidative stress, sleep disruption, and changes in gut microbial communication. Physical patterns may include rapid heartbeat, shallow breathing, digestive discomfort, muscle tension, restlessness, difficulty concentrating, sleep disturbance, and fatigue. Anxiety does not arise from one pathway alone; it reflects a network involving neurotransmitter synthesis and turnover, glutamate-GABA balance, serotonin and melatonin rhythm, dopamine and norepinephrine signaling, HPA-axis stress response, mitochondrial energy demand, endothelial function, and inflammatory regulation. Nutrition can influence the biological environment in which these pathways operate. Whole-food plant-based dietary patterns provide fiber, complex carbohydrates, magnesium, potassium, folate, vitamin C, vitamin E, carotenoids, polyphenols, amino acid precursors, and prebiotic substrates that support normal nerve function, gut microbiome metabolism, antioxidant defenses, glucose stability, and vascular function. A low-fiber, high-sodium, high-added-sugar, ultra-processed dietary pattern may contribute to less stable glucose regulation, lower microbiome diversity, oxidative stress burden, and inflammatory activation. The P53 approach for anxiety support is 100% whole-food plant-based and excludes oils, meat, dairy, and toxin-associated dietary exposures. It emphasizes intact vegetables, fruits, legumes, whole grains, mushrooms, nuts, seeds, herbs, and spices. Anxiety-supportive foods include leafy greens, legumes, oats, brown rice, quinoa, berries, citrus, cruciferous vegetables, pumpkin seeds, flax seeds, chia seeds, mushrooms, turmeric, ginger, and green tea. These foods are relevant because they provide magnesium, potassium, folate, vitamin C, B vitamins, zinc, selenium, fiber, polyphenols, carotenoids, and sulfur-containing phytochemicals that support oxidative balance, inflammatory regulation, gut-brain signaling, hydration and electrolyte balance, and circadian rhythm. This database entry classifies anxiety as an ailment pattern connected to nervous system arousal, stress-response signaling, neurotransmitter pathways, gut microbiome communication, sleep rhythm, oxidative defense, and mineral balance, while keeping the nutrition framework plant-based, non-pharmaceutical, and aligned with P53 standards.