The field of synthetic biology has been profoundly transformed over the past two decades due to major advances in biotechnology. Notable instances of this seismic shift can be seen in DNA sequencing, where the cost for human whole genome sequencing (WGS) has dropped by ten million-fold in the past 20 years from nearly 3 billion USD in 2003 to less than 300 USD currently. For perspective, in the field of computer technology the effects of “Moore’s Law” has drove computation cost down by a thousand-fold in the past 20 years. Significant advances in technologies underpinning synthetic biology in recent years are transforming many major industries, and one remarkable example of synthetic biology driven transformation is the cosmetics and skincare industry. Historically, changes in skincare have been driven by changes in raw materials: from ancient plant-based concoctions to industrial-era chemicals in the twentieth century, and later to the concept of “cosmeceuticals” emerged in the U.S., integrating pharmaceutical benefits into cosmetics to meet the growing demand for anti-aging skincare products. Today, there’s an increasing demand for more potent cosmetics, alongside a growing voice for environmentally sustainable production. Traditional skincare product development often involves reformulating existing ingredients, which faces limitations in efficacy. Additionally, the reliance on chemical synthesis or natural extraction methods for production poses additional environmental cost due to the use of chemical reagents and significant energy consumption. Rapid advances in biotechnology enables us to overcome such efficacy and environmental limitations through direct synthesis of biomaterials that are safer and more cost-effective than their industrial chemical counterparts. Synthetic biology tools such as AI-assisted protein design and strain engineering are enabling the production of much more potent biomaterials at industrial scales, thus providing more effective and sustainable bioactive ingredients for skincare. For example, previously expensive and hard-to-obtain compounds such as hyaluronic acid, ceramides, and collagen are now produced at a fraction of the cost compared to the previous decade. In recent years, synthesized collagen has shown that it can be designed to be humanized to minimize adverse human immune reactions, thus greatly reducing allergy and other health risks of the end product. The incorporation of biomaterials that were once exclusive to expensive therapeutics into consumer skincare product is rapidly transforming the cosmetics industry by narrowing the gap between medical-grade treatment and consumer-grade anti-aging. This trend marks a significant leap toward more effective, safer, and environmentally sustainable cosmetics products. Ultimately, the advent of synthetic biology-based cosmetics is ushering in the transitioning from traditional industrial chemical-based cosmetics to a new era of “bio-cosmetics”.