Shiseido Pure White Whitening Supplement 240 Tablets (30 Days) | L-Cysteine + Vitamin C Inner CareShiseido Pure White Whitening Supplement Inner Care for Even, Bright Skin Shiseido Pure White Supplement is a 30 day inner beauty course developed by one of Japan's most trusted skincare houses. Each daily dose pairs L cysteine and high dose vitamin C the two actives Japanese dermatology has used for decades to support an even, clear complexion with a curated blend of Asian botanicals (lychee, goji, chrysanthemum) and L glutathione precursors.