Team

Every Rein product begins with the jockey.

That principle was born in front of a refrigerator case at the racetrack. Reading the labels on the electrolyte drinks available to jockeys, Dr. Brenda McBride saw the problem plainly: every product had been developed for a different kind of athlete.

Most traditional sports drinks assume an athlete can consume a large volume of fluid without concern for the weight of that fluid. They are often highly concentrated and designed for athletes free to drink and refuel throughout competition. Jockeys have no such freedom. They compete under extraordinarily strict weight requirements, may compete in multiple races in a day, and often have only limited opportunities to drink between weigh-ins and races.

Jockeys deserve hydration developed around that reality.

Rather than adapting a conventional sports drink for racing, Brenda set out to create a formula based on the physiological needs and practical constraints of a jockey's day. She worked backward from the rider: the amount they could realistically drink, the concentration of the formula, the ingredients they needed, and how the product would feel before or between races.

Her path to Rein began in medicine. After graduating from the Royal College of Surgeons in Ireland, she returned to Philadelphia to complete her residency in pediatrics. Early in her career as a pediatric oncology hospitalist, she cared for children undergoing some of the most difficult treatments imaginable and saw repeatedly how strongly nutrition appeared to influence their strength, recovery, and ability to tolerate treatment. Yet medical education included surprisingly little training in nutrition, despite its fundamental role in health and healing.

That realization redirected her career. She pursued advanced training through the Andrew Weil Center for Integrative Medicine and earned board certification through the National Board of Physician Nutrition Specialists, bringing a deeper understanding of nutrition into her medical work.

Her focus eventually expanded to athletes. Through Onrise, a company providing mental health and nutrition support specifically for athletes, she began working with jockeys and learned about the physical and nutritional challenges they face. She became part of a team tasked with helping jockeys and racetrack culinary teams develop healthier, more sustainable approaches to nutrition — an experience that showed her, up close, the extraordinary demands jockeys place on their bodies and the absence of products designed for them.

Creating Rein brought together her background in chemistry, her work in nutrition medicine, her experience supporting jockey health, and her genuine love of horse racing. She co-founded the company with Tiffany Roibu, MBA, who serves as Chief Financial Officer.

Rein is not a traditional sports-nutrition company that happens to market to jockeys. It is a jockey-first performance company created to develop products around the unique needs of riders and the realities of their sport.

Tiffany Roibu co-founded Rein on a simple conviction: jockeys are elite athletes competing under physical demands unlike those in almost any other sport, and their health, hydration, and nutritional needs deserve products built for them — not systems designed for everyone else and handed down.

That conviction took shape when her co-founder, Brenda McBride, MD, described what she had observed at the racetrack: athletes maintaining exceptionally low riding weights, competing multiple times in a single day, and attempting to hydrate with formulas never designed for the realities of their sport. Tiffany recognized immediately that the opportunity extended well beyond a better hydration product. It was a chance to serve an overlooked athletic community and build a company accountable to its long-term health, performance, and well-being.

From the outset, she insisted Rein could not be another sports nutrition brand with a different label. If the company was going to serve jockeys, every part of it had to begin with them — the science behind the formula, the quality of manufacturing, the integrity of sourcing, the trust earned within the racing community, and every decision made as the company grows.

That mission draws on experiences that long predate Rein. Tiffany has consistently viewed nutrition as one of the most powerful and underused tools for helping people feel better, perform better, and reach their potential. During the COVID-19 pandemic, she worked with her local school district to deliver nutritionist-prepared meals to students who depended on them. She has volunteered in soup kitchens, where she saw how directly access to food and hydration shapes well-being. As a team manager and board member for a local youth athletic organization, she watched young athletes commit fully to their sport without the nutritional support they needed to compete at their best. Each experience reinforced the same lesson: meaningful solutions begin with understanding the people you intend to serve. Listen first, then build around their needs.

Her professional career in finance, operations, and business strategy taught her that even the strongest ideas succeed only when supported by discipline, integrity, and long-term vision. She earned her MBA from Villanova University and pursued executive education at the Wharton School of the University of Pennsylvania with the goal of understanding not simply how to launch a product, but how to build an organization capable of creating lasting value.

That is the role she plays at Rein. While Dr. McBride, a physician and board-certified nutrition specialist, ensures every product begins with the physiological needs of the jockey, Tiffany builds the company around that vision — protecting its integrity, establishing the operational and financial foundation for responsible growth, earning the confidence of the athletes and communities Rein serves, and ensuring the company can deliver on its promise for years to come.

Because Rein is not simply about hydration. It is about helping jockeys perform, recover, and protect their health in a sport that asks so much of them.

At Rein, the jockey comes first. Everything else follows.