Make gel cream that contains API: Wakame Extract (Undaria pinnatifida extract)
Pulified water 100
p.undaria extract 5.6
Disodium EDTA 0.1
Butylene Glycol 5.0
Carbopol 940 0.5
PEG400 5.0
Polysorbate80 3.82
Squalane 10
span80 2.18
Paraben concentrate in PG 1.0
TEA qs.
When making the base before adding API, the texture is gel-cream . But when adding API, the texture becomes watery. What is the cause? And which substance is incompatible with API? Should I adjust the proportions or change it to something else? TT