Asking permission to ask for serum formula 1. ไฮยาลูรอน 2. Sym-White 3. Alpha Arbutin 4. Repair Activator™ 5. DMAE (SkinTight MD™) Liquid are some questions: 1.Can they be mixed together or not? 2.Mixed together, does the concentration change or not? 3.Base serum 100 grams, how much can each ingredi...