Volumizing (also called thickening or body-building)
What It Does:
Temporarily thickens fine strands with positively charged proteins and polymers that attach to the hair. "It used to be enough to puff up the hair by coating it," says Joanne Crudelle, senior development manager for Unilever. "Now we want to make it fuller without making it feel coated or tacky." The newest formulas also use lightweight moisturizers like panthenol and vitamin E to condition hair without weighing it down.
What It Doesn't Do:
What to Look For:
Formulas containing sugars, wheat starch and amino acids to add fullness without stiffness. And polyquaternarium-10 to add texture, make styling easier, and give hair a less slippery feel. If styling residue is making your hair limp, try an alpha hydroxy acid like citric acid, which removes buildup.
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