Joanna Shu Built the Product Nobody Wanted to Talk About
A two-time Boston University graduate who traded a finance career at Fidelity Investments for the product development floor, she co-founded Cartwheel and launched Nit Happens - a pesticide-free, plant-based head lice treatment now on shelves in approximately 6,000 Walgreens locations nationwide - by turning a problem families find embarrassing into a business built on evidence, transparency and trust.
There is a version of the consumer health founder the industry has come to expect: someone who emerges from a laboratory background, raises a large seed round and talks almost exclusively in clinical language. Joanna Shu arrived from a different direction entirely. She came through the fixed income trading desk at Fidelity Investments, through a decade of building a natural skincare company from scratch, and through the particular clarity that comes from being a mother of three who understood firsthand how disorienting a head lice notification from school can be. The company she co-founded in Marblehead, Massachusetts - Cartwheel - is where all of those threads finally come together.
The foundation beneath that company is not accidental. Shu holds both a Bachelor of Arts in International Relations and a Master of Business Administration in Finance, both from Boston University. She spent years in financial services before recognizing that what she actually wanted was to create things, solve problems and build businesses. That recognition sent her into entrepreneurship, where she founded Refresh Skin Therapy and spent a decade developing and launching 17 skincare products, securing distribution through major retailers including Costco, Sam's Club, Walmart and Rite Aid, and reaching international customers through duty-free offerings aboard Singapore Airlines.
By the time she co-founded Cartwheel, she had already done the hard work of learning how consumer product companies are built - how to develop a formulation, earn a retailer's trust, reach a customer who has never heard of you and keep them coming back. What Cartwheel added was a mission that felt personal: making head lice treatment less confusing, less stressful and less stigmatizing for the families who need it most.
From an idea to 6,000 Walgreens shelves
The milestone Shu says she is most proud of is watching Nit Happens travel from an idea to the shelves of approximately 6,000 Walgreens locations nationwide. The journey to get there required more than a good formulation. It required building consumer trust in a category that carries real social stigma, demonstrating product effectiveness through a human clinical study and establishing the kind of retail relationships that take years to develop.
Cartwheel's flagship Nit Happens line is pesticide-free and plant-based - a deliberate choice that reflects Shu's belief that the future of consumer health belongs to products backed by evidence and free of unnecessary ingredients. Beyond Walgreens, the brand has established sales channels through Amazon, TikTok Shop, Instacart and DoorDash, meeting families wherever they are most likely to search for a solution in a stressful moment.
Cartwheel has also built a school nurse program, creating a recognition initiative that has honored nurses in Texas and Massachusetts. Over the past two years, Shu has worked directly with school nurses and families across the country to understand the real-world challenges they face - conversations that have shaped both the product and how the company communicates with the people it serves.
A philosophy forged in two industries
Shu's approach to leadership did not emerge from a single formative moment. It was built across two very different professional worlds. In finance, she learned to make decisions quickly, to take responsibility for them and to keep moving when conditions changed. In consumer products, she learned that instinct matters as much as analysis - and that waiting for certainty can cost more than acting on an informed hunch.
When asked what mistake taught her the most, she was direct: "Waiting too long to act when my gut already knew the answer. I've learned to trust my instincts and course-correct quickly." That lesson now shapes how she leads Cartwheel. Her view of what separates strong leaders from average ones is similarly unambiguous: "Great leaders see the opportunity quickly and then actually act on it. They make decisions, take responsibility and keep moving."
Her motivation is rooted in the same place. "I like solving hard problems," she has said. "As soon as someone tells me something can't be done, I usually want to figure out how to do it." That disposition - equal parts curiosity and stubbornness - is visible in the category she chose to enter. Head lice treatment is not a glamorous product space. It is precisely the kind of problem that a certain kind of founder finds irresistible.
Seventeen products, one decade, one pivot
Before Cartwheel, there was Refresh Skin Therapy. Shu founded the natural skincare company and spent ten years developing and launching 17 products, learning every dimension of the consumer product business along the way: formulation, branding, packaging, retail negotiation, supply chain and international distribution. The products reached customers through Costco, Sam's Club, Walmart, Rite Aid and Amazon domestically, and through duty-free channels aboard Singapore Airlines internationally.
That decade gave her something that no MBA program alone could provide: a working knowledge of what it actually takes to get a product from development to a customer's hands at scale. When she co-founded Cartwheel, she brought that operational fluency with her and applied it to a new category with a more personal origin story.
The pivot from skincare to family health was not random. It came from lived experience - from understanding, as a mother of three, how disorienting it can be to receive a head lice notification from school and find yourself staring at a shelf of options that are difficult to compare and even harder to trust. Shu recognized that the confusion itself was a product problem, and that solving it was an opportunity worth pursuing.
What she is watching - and what she is building next
Shu is paying close attention to a shift she sees accelerating across the consumer health category: families are asking harder questions about the products they use. "Consumers are asking harder questions about what's in the products they use on their families," she has said. "I think the future of consumer health is effective products backed by evidence, with fewer unnecessary ingredients and much more transparency." She is also tracking the growing influence of AI-powered shopping on how families discover and evaluate products.
Those observations are not abstract. They are built into how Cartwheel operates - from the decision to pursue a human clinical study for Nit Happens, to the emphasis on clear ingredient communication, to the choice of retail and digital channels that meet families at the moment of need. The company's presence on TikTok Shop and Instacart alongside its Walgreens footprint reflects a deliberate strategy to be findable wherever a parent is searching.
For Shu, success has never been defined by scale alone. "Building something that matters, with people I enjoy, without sacrificing my family or myself in the process," is how she describes it. As a mother of three running a consumer health company, she has made that balance a design constraint, not an afterthought. Her advice to entrepreneurs who are still on the other side of their first leap is the same thing she wishes someone had told her earlier: "Trust yourself sooner. You don't need to have every answer before you start."
This profile is reported from publicly available information and materials provided by Joanna Shu. Nothing in this article is presented as a quotation unless it appears in quotation marks with attribution.