The stronger the retinoid the more effective it becomes. However, effectiveness can exacerbate redness and irritation, even if temporary.  Retinaldehyde is a compromise between effectiveness and mildness. Retinaldehyde is directly converted into tretinoin by the skin.

L-Ascorbic Acid is found in the Obagi’s Professional-C™ serums in concentrations of 10%, 15%, and 20%. You can apply a few drops of the serum to the face, neck, and chest every morning before your sunscreen to start gaining the beneficial properties of Vitamin C.

Instant long-lasting hydration.
Specifically engineered with key biomimetic peptides, this ultra-rich moisturiser provides overnight, extra-strength moisturisation and has a luxurious, balm-like texture and comforting scent.