In the quest to combat the effects of ageing attributed to the sun, RATIONALE Founder and Director of Research, Richard Parker, embarked on a remarkable journey spanning over three decades. Recognising that an estimated 80% of facial ageing is caused by sun exposure, he set out to develop a serum that not only enhanced luminosity but also provided essential environmental protection. Central to this endeavour was the exploration of inorganic sunscreen actives, with a primary focus on titanium dioxide and zinc oxide.

Despite encountering challenges associated with zinc oxide, its innate properties held the promise of contributing to a radiant complexion. Abundant throughout the human body, zinc oxide serves as both an anti-inflammatory and antioxidant, playing a pivotal role in cellular health.

Despite numerous hurdles, Parker's dedication led to a breakthrough—the creation of #3 The Tinted Serum SPF50+—which was realised through collaborative efforts with RATIONALE Researchers and Cosmetic Scientists.

Delving into the intricate relationship between human skin, sunlight, and metallic oxides, our Research Team focused on zinc's remarkable properties. The introduction of #3 The Tinted Serum SPF50+ marks a ground-breaking era in skincare, featuring an innovative Zinc Oxide Complex. This exclusive blend not only imparts a luminous, translucent finish but also provides comprehensive solar protection by filtering UV, Visible Light (VL), and Infrared Radiation (IR).