Ask a little more 1. need to use auxiliary substances
นำพา to optimize? For example
Dimethyl Isosorbide (DMI) สารกันเสีย ? If so, which one do you recommend? For example
PaeoniaPreserve™ (สารกันเสียจาก Paeonia Extract) then all of the above substances asked from the first Which one smells? If there is no smell, which one can you recommend instead? Thank you.