Diana is a nationally recognized Registered Dietitian, Certified Diabetes Care and Education Specialist (CDCES), and holds a Master’s degree in Nutrition Science and Policy from the Tufts Friedman School of Nutrition.
She began her career in a very different field—after earning a Bachelor's degree in Communications from Villanova University, Diana worked in sports marketing at Major League Baseball for over three years. But her passion for health and nutrition inspired a career change. In 2015, she completed her Master’s at Tufts University and later her dietetic training at Simmons College and UC San Diego Health, where she worked in clinical settings focused on diabetes, cardiology, and oncology.
From the start, Diana’s connection to type 2 diabetes was very personal. She grew up watching family members struggle with the illness, especially her grandfather who had type 2 diabetes and relied heavily on insulin without knowing how much diet could help. During her training, Diana realized just how powerful nutrition and lifestyle changes can be in reversing and preventing diabetes. That moment sparked her mission.
She went on to work in various healthcare settings, including hospitals, outpatient clinics, and a dialysis center. Witnessing patients undergo dialysis—often caused by diabetes—had a lasting impact on her. It was heartbreaking, and it fueled her commitment to preventing such complications through education and lifestyle change.
Meet Diana Licalzi, MS, RD, CDCES
Eventually, Diana became a Certified Diabetes Care and Education Specialist and worked alongside doctors and specialists at Boston Medical Center, Labcorp, and InsideTracker. While she gained valuable experience in traditional healthcare, she felt limited in how much she could help. She began educating others online and sharing her knowledge on social media, which is how she eventually connected with Jose.
Today, Diana lives in Boulder, CO, with her husband and son, where she enjoys hiking and spending time in nature. She is also passionate about plant-based cooking and healthy eating.
Jose Tejero is an exercise physiologist and two-time Ironman Triathlete.
Jose originally planned to become a physician. While taking pre-med courses at the University of Maryland, he worked with doctors who used plant-based nutrition to treat chronic diseases. He saw patients dramatically improve their health, including one whose A1c dropped from 16% to 9% in under two months—all through diet and lifestyle changes. This experience opened his eyes to the power of nutrition, especially plant-based nutrition. However, after speaking with physicians who shared the challenges and limitations of the medical field, Jose shifted his focus and changed his major to Exercise Science.
After graduating as an exercise physiologist, Jose continued to deepen his knowledge in plant-based health worked with scientists who used plant-based nutrition to treat diabetes.
In 2021, Jose’s passion for exercise deepened as he decided to train for one of the most challenging and hardest competitions in the world, an Ironman Triathlon. This race which consists of a 2.4 mile (3.8 km) swim followed by a 112 mile (180.2 km) bike ride, and ending with a full marathon (26.2 miles or 42.2 km rule). After crossing the finish line, he signed up for another one, which he successfully completed the following year.
Jose is currently working towards becoming a Clinical Exercise Physiologist and a Certified Diabetes Care and Education Specialist, combining his two passions, exercise and diabetes.
Meet Jose Tejero, exercise physiologist
Today, Jose lives in Maryland with his fiancée, his dog Bruno, and cat Jiji. In his spare time, he enjoys cooking plant-based meals, staying active outdoors, biking, lifting, and optimizing his recovery.
Diana and Jose met in 2019 through Instagram and quickly discovered they shared the same mission: helping people reverse and manage type 2 diabetes through nutrition and lifestyle change.
That same year, they launched Type 2 Diabetes Revolution, a digital health platform that offers programs and resources focused on nutrition, exercise, and mindset. Since then, they’ve helped thousands of people take control of their blood sugar by addressing the root cause—not just the symptoms—of type 2 diabetes.
In 2023, they published their first book, The Type 2 Diabetes Revolution: A Cookbook and Complete Guide to Type 2 Diabetes, available in both English and Spanish. This science-based book includes over 100 high-fiber, plant-based recipes and four weeks of meal plans and grocery lists.
Wanting to support their clients even further, Diana and Jose launched JADE Supplements. After working with many people struggling to improve their health, they realized that lifestyle changes alone weren’t always enough. Many people needed extra support—especially with improving insulin sensitivity. Unfortunately, they found that most supplements on the market are underdosed or filled with unnecessary ingredients.
So they created JADE Supplements: clean, effective, and high-quality products made to support blood sugar balance and improve metabolic health. Every formula is carefully crafted using evidence-based ingredients and doses that deliver results.
Our Story: Type 2 Diabetes Revolution & JADE Supplements
At Type 2 Diabetes Revolution and JADE Supplements, Diana and Jose are dedicated to helping people reclaim their blood sugar and live healthier, fuller lives—naturally.
