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Elevated levels of the stress hormone cortisol can cause hair to fall out.

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Get tested for a thyroid disorder or anemia.

Either could be to blame.

Fast fix:Chill, sister!

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Even if you have a thyroid issue, baldness isn’t a certainty.

An Rx will regulate your gland and keep hair from coming out in clumps.

Same goes for anemia: Your M.D.

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Oscar Blandi Jasmine Smoothing Shampoo, $22

Buy it now!

Ditch Dandruff

Root cause:We all have yeast on our scalp (gross, we know!

After you’re free of flakes, substitute the formula for your regular shampoo once a week.

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Still snowing after a month?

Talk to your doc about prescription-strength creams to help lessen irritation.

Now go put on a black top.

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In fact, half of all women deal with some genetic thinning.

Another culprit: the Pill, which may up your level of hormones that cue strands to thin.

Women’s Rogaine, $30

End Breakage

Root cause:Crappy highlights!

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Opt for a gentler, no-foil technique called balayage.

Living Proof Restore Revitalizing Spray, $26

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