I know my hair needs protein if my curls are falling limp. I don't think I've ever over-protein'ed my hair. If your hair feels dry after using protein, then you don't need it. However, using protein over buildup leaves me feeling dry-ish.
2c-3a - coarse - normal-high porosity - high density - growing out to donate

NP/LP: , CJ Daily Fix, KMF Whenever Cond./ Giovanni TTTT
RO/LI: CJ Argan & Olive Oil, JC Too Shea
DT: Coconut Oil + scalp massage
OIL/STYLER: SM Elixir / JC Rockin' Ringlets, Aussie Instant Freeze, SS Curl Enhancing Jelly, KCCC
COLOR: henna, amla & indigo