Lovely is the most common description we get from our customers. The combination of DMAE and MSM give this serum synergetic property that makes this a fabulous product for mature, sensitive, irritated, dry, oily and acneic skin. Skin Types: Mature - Dry - Normal - Sensitive - Combination Organic Content: Yes pH: 4.5 – 5.5 DMAE is an amazing nutrient that extends the life of cells and inhibits the cross-linking of proteins, which gives the skin a nice tone and a firm appearance. This serum is very light and can be put on over or under the makeup. The firm appearance that DMAE can bring to the skin occurs within about 20 minutes and wears off by the end of the day.