Dry scalp is a condition involving reduced moisture retention, impaired skin barrier integrity, increased transepidermal water loss, and surface flaking of the scalp without the excessive oil production commonly associated with seborrheic dermatitis. The condition may develop gradually and is frequently associated with low hydration intake, environmental dryness, nutritional insufficiency, chronic oxidative stress, inflammatory dietary patterns, harsh cleansing products, low humidity exposure, excessive hot water exposure, and inadequate intake of micronutrients involved in epithelial maintenance and skin barrier repair. The scalp contains specialized epithelial cells and sebaceous structures that rely on adequate hydration, lipid balance, collagen integrity, antioxidant defense systems, and nutrient-dependent cellular turnover to maintain resilience and moisture stability. The outer epidermal layer of the scalp depends on structural proteins, phospholipid membranes, antioxidant enzymes, electrolyte balance, and normal keratinocyte turnover. When hydration balance becomes impaired, scalp tissues may become rough, flaky, tight, irritated, or more sensitive to environmental stressors. Oxidative stress may further weaken skin barrier stability by increasing lipid peroxidation and inflammatory signaling within epithelial tissues. Reduced antioxidant intake, low mineral intake, and insufficient plant polyphenol exposure may contribute to impaired epithelial resilience and slower barrier recovery. A whole food plant-based dietary pattern emphasizing hydrating fruits, mineral-rich vegetables, seeds, legumes, and antioxidant-rich whole foods may help support epithelial hydration pathways, collagen support systems, antioxidant recycling, and scalp barrier integrity. Water-rich produce such as cucumber, watermelon, orange, celery, tomato, and zucchini provide hydration-supportive nutrients alongside potassium, vitamin C compounds, carotenoids, flavonoids, and polyphenols involved in epithelial support biology. Seeds including flax-seeds-whole-raw, chia-seeds-whole-dried, and hemp-seeds-hulled-dried provide minerals, amino acids, and plant compounds associated with skin membrane support and hydration stability. Leafy greens including kale, spinach, and romaine-lettuce contain carotenoids, magnesium, folate compounds, vitamin K1, and antioxidant phytochemicals associated with cellular protection and epithelial maintenance. Blueberry, strawberry, pomegranate, and green-tea-brewed contain anthocyanins, catechins, ellagic-acid, and polyphenols associated with oxidative stress reduction and inflammatory balance. Adequate hydration combined with consistent intake of whole plant foods rich in fiber, minerals, antioxidants, amino acids, and phytonutrients may help support scalp comfort, epithelial turnover, cellular hydration balance, and normal skin barrier resilience.