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, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics