OSKIA Retinoid Sleep Serum Level 1 (0.2% plus Vitamin C, Pro-Vitamin D3 & E) OSKIA Retinoid Sleep Serum Level 2 (0.5% plus Vitamin C, Pro-Vitamin D3 & E) Two gentle yet highly effective, evening Retinoid treatments to help maintain a firm, plump, youthful and healthy-looking complexion. Levels 1 & 2 offer different strengths but both contain OSKIA’s advanced Super-Nutrient Retinoid Complex (Retinoid, Vitamins C & E and Pro-Vitamin D3) with high concentrations of cellular nutrients, plus botanical actives and key anti-oxidants. Non-greasy and deeply penetrating, use these super-charged serums as part of your evening skin routine.
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