You've tried bond builders. Protein treatments. Deep conditioners. They helped temporarily — then the panic came back.
Here's why results felt inconsistent: Bleach, heat, hard water, brushing, chlorine — all deplete L-Cysteine from hair daily.
And here's what the treatments you tried actually do:
❎ Bond builders → Reconnect existing bonds (but if L-Cysteine is depleted, there's less to reconnect.
❎ Protein treatments → Add random fragments (not the specific amino acid that forms elastic bonds
❎ Deep conditioners → Coat the surface (can't penetrate where elastic bonds form inside the cortex)
None of them replace the L-Cysteine your hair lost.
That's why the panic kept coming back. You were treating symptoms (broken bonds, surface dryness) — not the source (L-Cysteine depletion).