Seasonal allergies occur when airborne plant particles such as pollen interact with the immune system and mucosal surfaces of the nose, eyes, throat, sinuses, and airways. The biological pattern involves IgE-associated mast cell activation, histamine release, leukotriene signaling, prostaglandin signaling, cytokine activity, epithelial barrier irritation, oxidative stress, and mucus-producing airway responses. When the immune system identifies a seasonal airborne trigger, mast cells and other immune cells can release histamine and inflammatory mediators that contribute to sneezing, watery eyes, nasal congestion, throat irritation, itching, mucus formation, and airway sensitivity. The nasal and airway lining is not just a physical surface; it is an active immune barrier that responds to oxidative stress, environmental particles, hydration status, microbiome signals, and inflammatory cytokines. Seasonal allergy patterns are connected to NF-kB signaling, immune response signaling, eicosanoid synthesis, prostaglandin pathways, leukotriene pathways, T-cell signaling, epithelial barrier integrity, oxidative stress balance, Nrf2 antioxidant response, glutathione defense, gut microbiome signaling, and SCFA signaling. A 100% whole-food plant-based P53 Nutrition pattern supports this biology by emphasizing antioxidant-rich fruits, vitamin C-rich produce, polyphenol-rich berries, carotenoid-rich vegetables, magnesium- and potassium-rich greens, cruciferous vegetables, allium vegetables, herbs, spices, green tea, legumes, seeds, mushrooms, and fiber-rich whole grains. Vitamin C is involved in antioxidant defense and immune cell function. Quercetin, kaempferol, luteolin, apigenin, catechins, anthocyanins, hesperidin, naringenin, sulforaphane, glucoraphanin, curcumin, gingerols, allicin, carotenoids, and other plant compounds are studied for roles in oxidative stress, inflammatory signaling, mast cell biology, cytokine activity, and epithelial protection. Fiber-rich foods support gut microbiome metabolism and SCFA signaling, which are linked with immune regulation. Hydrating fruits and vegetables support mucosal moisture, while potassium- and magnesium-rich plants support normal cellular and smooth muscle function. P53 Nutrition avoids oils, meat, dairy, additives, refined sugar, fried foods, and toxin-heavy processed foods because these patterns can increase inflammatory burden or displace protective whole-plant nutrients. The goal is to support immune balance, barrier strength, antioxidant defense, mucus regulation, nasal comfort, airway resilience, and seasonal respiratory comfort through whole plant foods only.