Brittle hair falling out in clumps sounds pretty damaged to me, in 10 years of daily straightening my hair never fell out. Straightening once a week could do a lot less damage, when you consider that she would need to brush less and not pull it so tightly as well as cut down on product and take her hair down at night to relax.
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2C, Medium thickness, Low posity
Recovering from a year of keratin and bleach with CG
Low Poo, Condition, Leave in, Curl cream, Supersoak, Gel, Diffuse on high heat, with minimal lift to encourage waves and reduce frizz, Dry on cool with nozzle down to smooth hair and finish drying,Shine Serum
Weekly gelatin protien treatments.