Hair That Packs a Punch

If you are a flatiron fanatic

A sizzling-hot straightener fries the hair shaft, depleting it of moisture. The result: split ends and breakage.

Your plan: Bulk up

To fortify weak strands, apply a weekly hair masque that contains protein. Try L'Oréal Paris Advanced Haircare Total Repair 5 Damage-Erasing Balm ($7, drugstores). "Forget 450 degrees; 350 is a less damaging heat," Fugate says. Or try Coolway Iron Styler ($150, coolwayhair.com), which straightens at temperatures below 300 degrees.