Keratin is a structural protein that makes up hair, skin, nails, and the outer layer of epithelial cells. It is a fibrous, protective protein rich in sulfur, giving it strength and resilience.
Functions & Importance of Keratin
✅ Provides Strength & Structure – Acts as the building block of hair, nails, and skin.
✅ Protects Against Damage – Shields cells from heat, UV rays, environmental stressors, and water loss.
✅ Supports Wound Healing – Helps in the regeneration of skin cells.
✅ Enhances Hair & Nail Growth – Maintains thick, strong, and healthy hair and nails.
✅ Forms a Protective Barrier – Keratinized cells prevent pathogens from entering the body.
Types of Keratin
🔹 Alpha-Keratin (Soft Keratin) – Found in skin, hair, and nails (flexible but strong).
🔹 Beta-Keratin (Hard Keratin) – Found in bird feathers, claws, and reptile scales (rigid and tougher).
In humans, alpha-keratin is the dominant type, giving elasticity and durability to hair and skin.
Foods That Boost Keratin Production
While keratin itself is not found in food, your body makes it using protein, biotin, and sulfur-rich nutrients.
🥩 Protein Sources: Chicken, fish, eggs, dairy, legumes
🥦 Sulfur-Rich Foods: Garlic, onions, broccoli, kale
🥑 Healthy Fats: Avocados, nuts, and seeds (support keratin structure)
🥚 Biotin Sources: Eggs, almonds, sweet potatoes (biotin is essential for keratin synthesis)
Keratin Deficiency Symptoms
⚠️ Brittle Hair & Nails – Weak, thin, or easily breakable nails and hair
⚠️ Dry, Rough Skin – Skin becomes flaky and loses elasticity
⚠️ Slow Hair Growth – Hair appears thin or prone to shedding
⚠️ Increased Wrinkles & Fine Lines – Loss of skin elasticity over time
Keratin Treatments & Supplements
🔹 Keratin Hair Treatments – Used to smooth and strengthen hair (common in salons).
🔹 Keratin Supplements – May improve hair and nail health, but a balanced diet is more effective.
🔹 Biotin & Collagen Supplements – Help stimulate natural keratin production.
Final Thoughts
Keratin is essential for strong, healthy hair, skin, and nails. Supporting its production through a nutrient-rich diet, proper hydration, and protective hair care ensures optimal strength and resilience.