Bond repair products have become a staple in hair care routines, but the science behind the term often remains unclear. Molecular biologist Jared Reynolds, founder of ACTIIV and Zenagen, explains the complexity of hair structure and how current products may oversimplify the process. Hair’s strength comes from multiple chemical bonds, not just one type.
Understanding Hair Bonds
Hair is composed of keratin proteins linked by different chemical interactions. Disulfide bonds are the strongest, covalent bonds that provide permanent structure. These bonds can be disrupted by chemical processes like bleaching. However, hydrogen and ionic bonds also play critical roles. Hydrogen bonds are weaker and dynamic, forming and breaking with exposure to water and heat. Ionic bonds depend on the hair’s pH, changing during chemical treatments.
When hair undergoes stress from bleach, heat, or daily styling, multiple bonds can be affected simultaneously. Oxidation, protein loss, and cuticle damage may occur together. Traditional bond repair products often focus on disulfide bonds, overlooking the dynamic nature of hydrogen and ionic bonds. Reynolds emphasizes that real-world damage involves various stressors acting on the hair fiber over time.
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Beyond Disulfide Bonds
Reynolds developed ACTIIV’s INTEGRITYrx system to address the limitations of existing products. The system includes INTEGRIFLEX Technology, which supports hydrogen and ionic bonds, enhancing strength and flexibility. This approach contrasts with traditional methods that target only disulfide bonds.
Scientific Validation
Reynolds insists on rigorous testing for product efficacy. INTEGRITYrx was evaluated by TRI Princeton, a leading independent research organization, using established methodologies. Testing compared the system against untreated hair and leading competitors, measuring endpoints like breakage protection and frizz control. He advocates for objective, independent validation.