Hair protein is primarily keratin, a fibrous structural protein that makes up over 90% of your hair. It's also found in your skin, nails, and internal organs. Keratin provides strength, structure, and protection to your hair.
Understanding Keratin and its Role in Hair
Keratin is a protein composed of amino acids, linked together to form strong, resilient fibers. These fibers intertwine to create the structure of your hair shaft. Think of it as the building block of healthy, strong hair.
- Strength and Structure: Keratin's fibrous nature gives hair its strength and elasticity, preventing breakage and damage.
- Protection: Keratin acts as a barrier, protecting hair from environmental stressors like UV radiation, pollution, and heat styling.
- Moisture Retention: While keratin itself isn't a moisturizer, its intact structure helps retain moisture within the hair shaft, preventing dryness and brittleness.
Many hair care products contain hydrolyzed proteins or amino acids—smaller molecules derived from proteins like keratin—that can help repair and strengthen damaged hair. These are often derived from sources such as:
- Rice
- Soy
- Wheat
- Oats
It's important to note that while protein is crucial for healthy hair, too much protein can lead to dryness, brittleness, and a condition known as protein overload. A balanced approach, considering both protein and moisture, is essential for optimal hair health.
Recognizing Protein in Hair Care Products
Identifying protein in hair care products can be done by looking for ingredients that sound like foods or plants (e.g., rice protein, soy protein, wheat protein) or ingredients containing the term "hydrolyzed." Hydrolyzed ingredients are proteins that have been broken down into smaller molecules, making them easier for the hair to absorb.
Determining if Your Hair Needs Protein
Signs your hair needs protein include:
- Stringy, flat, or limp hair
- Highlighted, dry-looking hair
- Brittle or easily broken hair
