Virtually everyone can use and benefit from a bond-building hair treatment. “As every single person experiences damage to some degree, strength and repair will always be important,” says stylist Jordan Alexander,

director of global sales and education of K18. “For those with damaged hair, the goal is to repair. For those with healthy hair, it’s all about maintaining the integrity.”

These deep treatments, however, are especially important for anyone with hair on the more damaged side. "Bond-building hair treatments are best for anyone who gets color, balayage, highlights, or uses heat on their hair," says Amika pro educator and stylist Aoife McCarthy. "All of that causes damage that needs to be repaired."