111Skin Black Diamond Retinol Oil in Beauty: NA. 111Skin Black Diamond Retinol Oil in Beauty: NA. The 111SKIN Celestial Black Diamond Retinol Oil is the ultimate age-defying treatment for all skin types. Made with cold press technology, this highly concentrated night treatment contains maximum strength 1% pure retinol, formulated to rapidly resurface uneven skin texture, diminishing the appearance of age spots, fine lines, and wrinkles.. Regenerative oils rich in vitamins, minerals, and Omega fatty acids help to heal and renew the skin. Rich in Vitamin E and fatty acids, rice bran oil deeply penetrates into skin's layers to nourish from within. Copper stimulates cell production and is an excellent source of B-complex vitamins. 1.01 fl oz. Use only at night, applying a pea sized amount after cleansing. Limit initial use to 3 times per week; gradually increase frequency to alternate nights, then finally every night as tolerated. Do not use at the same time as an AHA or BHA exfoliant. 111R-WU11. INRORSS01. Working in collaboration with space scientists responsible for the well-being of astronauts, renowned cosmetic surgeon Dr. Yannis Alexandrides developed the patented NAC Y2 formula that runs through the core of his highly effective skincare line. Named after his Harley Street, London clinic, 111SKIN's cutting-edge products feature potent healing ingredients designed to promote a youthful and radiant appearance while offering unprecedented protection against environmental damage.