Meditherapy's Retinal Skin Booster Serum is great for my dry and aging skin that is sensitive to irritation. The serum contains Retinal , Calming centella , Retinal Liposome, Cica Biome, Centella-derived Probiotics . The packaging is easy to use and and pumps out a small amount so as not to use too much product. I used the serum at nighttime after I clenased and toned my face and it felt silky smooth going on quicky absorbing into my dry skin. It is a funky yellow color with a more viscous gel feel. It is advised to avoid sun or wear SPF while using this product. And it says to refrigerate after opening for best results.