Weight Loss Team Bios

Meet Our Weight Loss Team

From our world-renowned weight loss researchers, MDs and registered dietitians to our front desk staff, we have the best in the business.

  • Holly Wyatt, MD

    Holly Wyatt, MD

    Holly Wyatt, MD - Medical Director & Associate Professor

    A physician and clinical researcher, Holly has extensive experience in weight loss using medications and behavioral, dietary, physical activity and surgical treatments.

    Holly is co-author of State of Slim, revealing how Coloradans get and stay slender. As medical director of Extreme Weight Loss, she uses these principles to guide cast-member journeys.

    Her research interests include resting and total energy expenditure, fat oxidation and activity levels in weight-reduced populations. She studies the effect of diet on long-term success, as well as weight loss with Atkins’ vs. low fat-high carb diets and diet composition, exercise patterns and breakfast consumption in the National Weight Control Registry.

  • Marc-Andre Cornier, MD

    Marc-Andre Cornier, MD

    Marc-Andre Cornier, MD - Associate Director & Professor

    Education & Certifications

    • BS, Vanderbilt University
    • MD, Medical College of Georgia
    • Residency/Internship, Georgetown University
    • Endocrinology Fellowship, University of Colorado

    Areas of Specialization

    • Obesity
    • Food intake regulation
    • Neuroimaging
    • Insulin action



    Personal Notables

    • Associate director, CU Adult Diabetes Program
    • Director, University of Colorado Health LDL Apheresis Program
    • Medical director, My New Weigh meal-replacement weight-loss program
    • Staff physician, Denver Health
    • Active volunteer for the American Diabetes Association, American Heart Association, the Endocrine Society and the Obesity Society

  • Victoria Catenacci, MD

    Victoria Catenacci, MD

    Victoria Catenacci, MD - Assistant Professor

    Education & Certifications

    • BA/BS, University of Notre Dame
    • MD, Yale University
    • Internal Medicine Residency, Yale-New Haven Hospital
    • Chief Resident, Yale-New Haven Hospital
    • Board Certification in Endocrinology

    Areas of Specialization

    • Physician-directed weight management


    • Individualized behavioral strategies for weight management along with weight-loss medications for appropriately selected patients.

    Personal Notables

    • Varsity Monogram Winner, Women’s Diving, University of Notre Dame
    • NIH F32 National Research Service Award
    • NIH K23 Career Development Award
    • Principle investigator of five-year NIH-funded R01 to evaluate the optimal time to begin exercise within a behavioral weight-loss program

  • Jacinda Nicklas, MD, MPH, MA

    Jacinda Nicklas, MD, MPH, MA

    Jacinda Nicklas, MD, MPH, MA - Assistant Professor

    Education & Certifications

    • BA/MA, Stanford University
    • MD/MPH, Harvard University
    • Internal Medicine Residency, Brigham and Women’s Hospital
    • General and Integrative Medicine Fellowship, Harvard University

    Areas of specialization

    • Internal medicine
    • Researches women’s health, obesity, weight loss and disease prevention
    • Weight control throughout the reproductive cycle
    • Helps postpartum women lose weight and decrease diabetes and cardiovascular disease risks


    • Most people cannot lose weight on their own. When you’re ready, I can help you achieve your goals.

    Personal Notables

    • Completed a half Iron Man with mom to celebrate her 70.3-year birthday
    • Loves to run, bike and ski
    • Likes to cook vegetables

  • Marsha Miller, MS, RD

    Marsha Miller, MS, RD

    Marsha Miller, MS, RD - Senior Registered Dietitian & Senior Professional Research Assistant

    Education & Certifications

    • MS/RD, St. Louis University
    • BS, University of Nebraska ‑ Lincoln

    Areas of Specialization

    • Weight loss and wellness transformations
    • State of Slim coach
    • Diabetes research and interventions
    • Individual and small-group interventions


    • Wellness changes everything! YOU can accomplish anything you put your mind to. Food is fuel.

    Personal Notes

    • Love to spend time outside being active with my son, Cody, and dog, Sammi
    • Endurance cyclist and enjoy all water sports
    • Passionate about helping others with their transformation

  • Staci Barton Lupberger MS, RD

    Staci Barton Lupberger MS, RD

    Staci Barton Lupberger MS, RD - Assistant Director

    Education & Certifications
    MS, Human Nutrition/Food Science, Colorado State University
    BS, Dietetics, Northern Colorado University
    BA, Media Arts/Journalism, University of Arizona
    Registered Dietitian

    Areas of Specialization
    Health & Wellness
    Clinical Trials Project Management
    State of Slim Coach

    “Optimism is the faith that leads to achievement.” – Helen Keller

    Personal Notables
    200 hour Registered Yoga Teacher (RYT)
    4 time Marathon Finisher
    ….and mother of a beautiful, inquisitive and amusing son!

  • Anthony Millard, MD

    Anthony Millard, MD

    Anthony Millard, MD - Assistant Professor of Medicine

    Education and Certifications

    • MD: Northwestern University Feinberg School of Medicine (2015)
    • Residency: Emory University, Internal Medicine (2018)
    • Fellowship: Boston University, Obesity Medicine & Nutrition (2019)

    Areas of Specialization

    • Obesity Medicine


    Our goal is to help patients make sustainable lifestyle changes (nutrition, activity, sleep, stress) that they can carry with them for the rest of their lives.

  • Shelby Sullivan, MD

    Shelby Sullivan, MD

    Shelby Sullivan, MD - Associate Professor of Medicine

    Education and Certifications

    • MD: Washington University School Of Medicine, St. Louis, MO (2001)
    • MS: Clinical Investigation, Washington University School of Medicine (2012)
    • BS: University of Wisconsin, Madison, WI (1997)
    • Residency: Internal Medicine, Washington University School of Medicine (2004)
    • Fellowship: Washington University School of Medicine, Gastroenterology (2007)

    Areas of Specialization

    • Director of the Gastroenterology Metabolic and Bariatric Programs



  • Kristin Stockman, MS, RN, ANP-BC

    Kristin Stockman, MS, RN, ANP-BC

    Kristin Stockman, MS, RN, ANP-BC - MS, RN, ANP-BC - NURSE PRACTITIONER

    Education and Certifications

    • MNS, University of Colorado Anschutz Medical Campus
    • BSN, Regis University
    • BS, University of Colorado Boulder
    • Adult Nurse Practitioner – ANCC Board Certification

    Areas of Specialization

    • Weight Management
    • Health Promotion


    “It is not how much you do but how much love you put in the doing” -Mother Teresa

    Personal Notables

    Outside of work, I am a wife and mother of two amazing children.

    I enjoy cooking, hiking and travelling.

  • Melissa Lanes, MS, RD, CSCS, CHES

    Melissa Lanes, MS, RD, CSCS, CHES

    Melissa Lanes, MS, RD, CSCS, CHES - Registered Dietitian & Professional Research Assistant

    Education and Certifications

    • MS, Health Education and Behavior, University of Florida
    • BS, Food Science and Human Nutrition, University of Florida
    • Dietetic Internship, Meredith College
    • Registered Dietitian/Nutritionist
    • Certified Strength and Conditioning Specialist
    • Certified Health Education Specialist


    Areas of Specialization

    • Individual and Group Nutrition Counseling and Education
    • Interdisciplinary Health and Wellness
      Nutrition, Metabolism, and Physical Activity Research


    Personal Notables

    • Fluent in Spanish and Hebrew
    • Passionate about helping her patients live life to the fullest

  • Aimee Herbert, MS, RN, FNP-C

    Aimee Herbert, MS, RN, FNP-C

    Aimee Herbert, MS, RN, FNP-C - Nurse Practitioner

    Education & Certifications:

    • MSN, Family Nurse Practitioner, Regis University
    • BSN, Regis University
    • BA, International Affairs, University of Colorado, Boulder
    • Family Nurse Practitioner Certified – American Academy of Nurse Practitioners

    Areas of Specialization:

    • Weight Management
    • Health Promotion/Prevention


    Personal Noteables:

    • I am married and a mother to two young children.
    • I am passionate about health and wellness.
    • I love to run, hike, and bike and enjoy being outdoors.

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Fitness Center: 303-724-WELL (9355)
Wellness Clinic: 303-724-9030

12348 E Montview Blvd.
Aurora, CO 80045

Fitness Center Hours

M-TH: 5am-9pm
FRI: 5am-8pm
S-S: 7am-3pm