Hey there! I use and like the SM Coconut/Hibiscus line, BUT it doesn't have hydrolized protein in it. (It basically means that the silk protein in the SM line is not as effective).

From what you describe, yes your hair probably needs more protein and you should probably add in at least an RO w/ hydrolized protein in order to maintain your protein levels in between PTs. Hope this helps!

EDIT: you can also get Colorful Neutral Protein Filler from Sally's and add a few drops to the SM conditioners you already have.
2bc/ f / ii. low porosity roots + normal porosity shaft. normal elasticity.

Currently using:
Low-poo: Seaweed Bath Co. Unscented shampoo
Cowash: Cure Care
RO: Cure Care, V05 KL, G SAS
Styler: UFD CM (old formula), FSG + CNPF, DE Shine & Refine, AB Strong Hold gel, SM C&S milk
PT: IAgirl's gelatine, CJ Repair Me

hydrolized protein, jelly stylers
guar hydroxypropyltrimonium chloride, sulfates, jojoba oil
Neutral on cones.

iherb discount code: CFN646