In this episode of Demystifying Cosmetics, Jennifer speaks with Kailey Brandt — chemical engineer and CEO of Sonsie — about what sustainability actually looks like when you move beyond marketing claims and into the real constraints of formulation, sourcing, packaging, cost, and consumer education. Together, they unpack why “natural” is not always more sustainable, how biotech is changing what’s possible in beauty, and why transparency has to go deeper than front-of-pack language.
The conversation also explores Sonsie’s “minimalist but efficacious” philosophy, why consumers do not need 40 ingredients in a face cream, how over-layering familiar actives like niacinamide can create irritation, and why product education may be one of the most overlooked costs in sustainable beauty. It’s a grounded discussion on performance, skin health, planetary health, and the tradeoffs brands still have to navigate behind the scenes.

Learn more at https://sonsieskin.com/

Takeaways:
Sustainability Has to Survive Real Product Development: Kailey breaks down the gap between sustainability marketing and the actual realities of sourcing, manufacturing, formulation performance, and cost.
“Minimalist but Efficacious” Is a Supply Chain Decision Too: Sonsie’s philosophy is not just about fewer steps for the consumer. It is also about reducing unnecessary complexity in formulas, sourcing fundamental ingredients better, and minimizing both skin irritation and environmental impact.
More Ingredients Do Not Automatically Mean Better Skincare: One of the clearest points in the episode is that brands do not need 40 ingredients in a face cream just to make a formula feel advanced or harder to copy.
Transparency Matters Most When It Changes Usage: Kailey explains why Sonsie shares active percentages and why ingredients like niacinamide, while effective, can become irritating when they appear across too many products in a routine.
The Industry Still Undervalues Product Education: Better packaging and better ingredients only go so far if consumers are not taught why they matter, how to dispose of them correctly, or what makes them worth paying for.
“Natural” Is Not a Shortcut to Sustainability: The episode pushes back on one of beauty’s biggest myths by showing how land use, water use, waste, seasonality, and life cycle analysis can make a synthetic analog the better environmental choice.

Timestamps
00:00 Intro
00:57 Start
01:56 Meet Kaylee Brat
02:31 Chemical Engineering and Sustainability
03:11 Questioning Supply Chains and Certificates of Origin
04:39 Trade-Offs in Sustainable Sourcing
05:12 Biotech, Biomimicry, and Better Ingredients
08:30 Why Cost Is Still the Biggest Barrier
09:43 Why the Industry Has to Invest Together
11:37 What “Minimalist but Efficacious” Really Means
12:22 Do You Really Need 40 Ingredients in a Face Cream?
13:20 Minimal Impact on Skin and Environment
14:50 Why Sansi Shares Active Percentages
15:13 Niacinamide, Irritation, and Product Transparency
15:50 Fragrance Transparency and Sensitive Skin
18:47 Lucent Laboratories and Transparent Fragrance
20:26 The Economics of Sustainable Product Development
22:03 Packaging and Formula Should Be Developed Together
24:18 The Hidden Cost Consumers Don’t See
24:38 Why Product Education Matters
28:08 Why Sustainability Marketing Starts With What Consumers Understand
29:22 The Biggest Sustainability Myths in Beauty
29:45 Why Natural Isn’t Automatically More Sustainable
31:24 Life Cycle Analysis and Better Decision-Making
32:01 Why Packaging Was the First Sustainability Focus
33:08 Supply Chain Risk and Ingredient Shortages
35:06 Clean Does Not Equal Green
37:00 Clean Lists vs Sustainability Preferences
38:12 Using SDS and Better Standards in Development
39:47 Hidden Complexity Behind Ingredient Sourcing
40:38 What Brands Should Change First
42:42 Conclusion