Evidence based ingredients for damaged or porous hair include coconut oil, ceramides, hydrolysed protein and panthenol. Most commercial brands contain little of any use most of them are loaded with silicones which give faux shine and slip: there are some good products in the British Curlies store.
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Boots Essentials gel
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect