Keratosis pilaris is a skin condition characterized by rough follicular bumps that commonly appear on the upper arms, thighs, buttocks, and cheeks. The condition is associated with excessive keratin accumulation around hair follicles, producing a sandpaper-like texture and visible plugging of follicular openings. The biological pattern often involves altered epithelial turnover, impaired barrier hydration, low-grade inflammatory signaling, oxidative stress, and disrupted skin lipid balance. Dry environmental conditions, inadequate hydration, excessive intake of ultra-processed foods, and low intake of antioxidant-rich whole plant foods may contribute to worsening skin texture and irritation. The skin barrier depends on adequate intake of carotenoid-rich vegetables, vitamin C–containing fruits, amino acids involved in collagen structure, trace minerals that regulate epithelial repair, and phytonutrients that influence inflammatory signaling pathways. Keratosis pilaris may become more noticeable during colder seasons when humidity decreases and transepidermal water loss increases. Reduced intake of colorful plant foods may decrease antioxidant protection within skin tissue while also limiting support for collagen biosynthesis and epithelial turnover. Inflammatory signaling pathways including NF-κB, oxidative stress responses, and epithelial barrier pathways may influence the appearance of follicular roughness. Impaired hydration balance and poor dietary diversity may also contribute to altered keratinocyte differentiation. Whole plant foods rich in carotenoids, flavonoids, polyphenols, sulfur compounds, and vitamin C are associated with healthier epithelial tissue function and collagen integrity. Foods including carrot, sweet-potato-orange, kale, spinach, broccoli, red-onion, tomato, kiwi, papaya, and pumpkin provide compounds linked to antioxidant defense and skin-supportive nutrient density. Fiber-rich legumes, vegetables, fruits, and whole grains may also support gut microbiome signaling and epithelial barrier integrity, both of which influence inflammatory tone throughout the body. Polyphenol-rich foods such as blueberry, strawberry, green-tea-brewed, turmeric-ground, and garlic contain compounds studied for modulation of oxidative stress and inflammatory mediators involved in skin irritation. Amino acids including glycine, proline, lysine, and serine contribute to collagen and epithelial structural support. A whole food plant-based diet emphasizing hydration, colorful vegetables, fruits, legumes, mushrooms, herbs, spices, and mineral-rich whole foods may support healthier skin texture, epidermal turnover, and antioxidant balance associated with keratosis pilaris support.