Stellar Restoration Retinol Serum. This Product Is:. an overnight treatment serum . . Good For:. . oily, blemish-prone, easily inflamed, congested, and reactive hormonal skin types. Why We Love It: . Klur Stellar Restoration Retinol Serum is an elegant configuration of beneficial vitamins, nutrients, and bioactive botanicals purposefully designed for an easily congested, lackluster complexion in need of clarity and correction. Fortified with multi-corrective and potent vitamins A, C, and B, this fast-acting serum works diligently to help calm inflammation, correct imperfections, improve surface clarity and smooth the appearance of uneven skin texture. .