Flaxseeds are food items they are not toxic nor likely are most of your additives, and you will presumably be washing everything. Might get more responses on DIY if you post on the recipes board not high porosity.
As per your other thread, IMO don't use any additives the first tine, see how your hair responds to straight up flaxseed gel, then decide on additives based on that.
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