Ren bio retinoid anti ageing concentrate is a synergistic complex of pure potent 100 nature derived vitamin a pro vitamin a and retinoid analogue that combats the appearance of wrinkles imperfections and age spots leaving the complexion visibly younger smoother and brighter without the irritating effects of synthetic retinol with ren bio retinoid anti ageing concentrate skin appears smoother and younger the complexion appears brighter and more even toned ren bio retinoid anti ageing con