SAS Retional Facial Serum Intensive Cream Suero Facial 40gSAS retinol uses the advanced spherulite technology that makes retinol more stable. This technology stimulates deep cell penetration and speeds up the skins regeneration process by 30 40%. This further helps eliminate the purging period, or minimises its side effects such as redness, dryness or skin irritation, something which is very common in traditional retinols. BENFITS: Helps fade dark spots & pigmentation Stimulates collagen production Reduces