Meet the Founders

Mashhoud’s journey into regenerative health began through his own experience with Crohn’s disease. The conventional path centered on long-term medication, which began taking a toll on his overall health and quality of life.

Determined to find a different approach, he immersed himself in research on regenerative medicine, peptides, metabolic health, and emerging therapies focused on improving the body’s ability to function and recover. Through that process and by working with medical professionals already practicing in regenerative medicine, he was able to come off medications and completely rethink his approach to health.

Lean Lab was born from that experience. His vision is to create a place where people can access innovative therapies in a structured, medically supervised environment—helping patients take a proactive role in their health and performance.

Bianca Tomassian brings over a decade of clinical experience to Lean Lab. With more than 10 years in family medicine and general practice, she developed a strong foundation in comprehensive patient care and a deep understanding of the physiological systems that influence whole-body health.

Over the course of her career, Bianca developed a focused interest in metabolic health, preventative medicine, and the role advanced therapies can play in helping patients improve outcomes beyond traditional treatment models.

At Lean Lab, she specializes in regenerative health, hormone optimization for both men and women, and medically supervised weight loss. Her approach centers on personalized care and evidence-informed therapies designed to fine-tune metabolic and hormonal balance.

Lean Lab was founded by Mashhoud Zarabi and Bianca Tomassian, PA-C with a shared goal: to create a medical practice where patients can access advanced therapies designed to improve metabolic health, restore balance, and support long-term wellness.

For many people, the traditional healthcare model focuses primarily on managing symptoms. Lean Lab was created to offer a more proactive approach — one focused on optimizing how the body functions through medically supervised therapies and modern regenerative health strategies.