Exactly How to Cultivate Longer, Stronger Hair

Dry hair can be challenging, so Bodt recommends rotating weekly masks: "For hair to grow you need three treatments: one for protein, one for moisture, and something to help rebuild hair bonds." Get your hair on a schedule — protein one week, moisturizing the next, and then consider a bond builder like the original (and a favorite of Bodt's), the Olaplex No. 3. Hair Perfector, $28. Bodt advises leaving it on for an hour or — even better — sleeping in it and washing it out in the morning.

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