Try these tricks while waiting for your growth spurt to kick in.
GAIN A FEW INCHES: DIY straighteners (like Keratin Perfect, or Bumble and Bumble Concen-Straight Smoothing Treatment, $45) stretch out wavy strands, so they look longer.
MAKE THIN HAIR SEEM DENSER: Root-concealing sprays, such as Rita Hazan’s , hide a sparse, too-visible part.
CREATE TONS OF BODY AND VOLUME: Prep hair with a primer pre—blow dry—it boosts the effects of strandplumping stylers (volumizer, thickening spray) applied after it.
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