Meet the Staff

Dr. Tony Zbigniew Chmielewski – Chief Medical Officer

As the Chief Medical Officer of MyVita Wellness Institute, I was frustrated only seeing sick patients and treating disease, as opposed to focusing on the prevention of these diseases and helping people feel great.

I remember looking at myself and others around me, thinking, does getting older have to be this way? As we age, we tend to retain weight that we cannot get rid of, which seems to get worse every year.

We lose muscle tone, and our skin begins to sag. We ask ourselves, is losing your sex drive a requirement of “getting older”? We wonder if we are ever going to feel the way we did when we were younger; or have we lost it forever? The answer is, absolutely not!

Medical Background
I have over 30 years of experience in medicine specializing in fields such as obstetrics, internal medicine, and gynecology. I have practiced in both Europe and the United States giving me a unique perspective on traditional, as well as, preventative medicine.

I am a member of the American Academy of Anti-Aging Medicine along with being board certified by the American Board of Internal Medicine.

“Reach Beyond Possible”


Dr. Marcel D. Thompson, D.O., F.A.C.O.G

Dr. Marcel Thompson is a native Texan, born in Del Rio, Texas and raised in San Antonio and Houston, Texas. Dr. Thompson had a passion for medicine at an early age and graduated from the High School for Health Professions in Houston, Texas before attending Prairie View A&M University, where he received a Bachelor of Science degree.

He then went on to receive his medical degree from Michigan State University College of Osteopathic Medicine. He also met his wife Dr. Dewana Thompson, while she was working on her doctorate in Family Studies and Child Development. Soon after they were married Dr. Thompson completed his obstetrical/gynecology residency from Tulane Medical University, in New Orleans, La, before serving six years in the U.S. Army.

Dr. Thompson was in private practice in Round Rock, Texas and Texarkana, Texas before serving the underinsured communities as the Women’s director at Hope Asian Community Health Clinic and recently with Legacy Community Health Clinic.

His community involvement includes serving as State Vice-Chair for Programs with the March of Dimes Texas Chapter; a previous board member of the Austin Area Urban League. Dr. Thompson also has served on the Texas Medical Association select committee on Medicaid, CHIP and the uninsured; as well as being appointed to the Health and Human Services Commission (HHSC) Medicaid and CHIP Regional Advisory Committee by the HHSC director. Currently, the President Select for the Harris County Medical Society Southwest Branch.

Drs. Thompsons’ have two sons Marcus (Age 18) and Matthew (Age 13) and a daughter Maya (Age 7). They have been married for over 22 years. Both share a passion for promoting health and wellness in women and children and have worked together in bringing together on various early childhood agencies to improve access and continuity of care for women and children in the community.

Dr. Thompson is committed to providing an integrated approach to women’s health that treats the whole patient not just a list of symptoms.


Fotini “Tina” Manolopoulos

When becoming a patient of our Elite Program at MyVita you will meet with our nutritionist, personal trainer, as well as, our physician Dr. Tony and myself. You and I will become well acquainted. My name is Fotini “Tina” Manolopoulos, I have been with MyVita for close to four years. Aside from being patient care coordinator I am also the on staff phlebotomist and medical assistant. It is my job as patient coordinator to walk you through the process and to assist you with scheduling appointments and knowing what comes next. Together we will find a harmony which will allow you to optimize your health, feel younger, and be more energetic; all while having a treatment in place which is ideal for YOUR life!


Lenny Ventimiglia

As the clinic director and co-founder of MyVita Wellness Institute, I have the pleasure of seeing firsthand how our program can change the quality of people’s lives. For 5 years now I have not only helped people take the first step to feeling great from the inside out, I too have enjoyed the benefits of the program. Personally, I lost 26 lbs. within the first 90 days of being on the program and have drastically increased my energy levels and finally can sleep at night. “It’s amazing to see the transformation that our program has made in my life!”*


Vanessa Dueñas

Vanessa Dueñas is a health, fitness and wellness enthusiast her whole life. She has worked as an exercise physiologist and nutritionist since 2011. She graduated from Louisiana State University with a Bachelor of Science (2009) and a Master of Science with a concentration in exercise physiology. Aside from her educational experience, Vanessa was a competitive swimmer all her life.

Vanessa was born and raised in Miami, FL. She qualified and attended the 2000 U.S. Olympic Trials, at the young age of 14 years old, where she swam the 200 meter butterfly. From 2001-2006 she swam for Colombia, the country, where she was able to travel worldwide and compete in the Pan American Games, World Games, and South American Championships. She received a full athletic scholarship to Syracuse University where she attended her freshman and sophomore year of college. While at Syracuse she held 4 of the fastest times in the 100 and 200 butterfly, 200 and 400 Individual medley (IM) and tied the school record in the 400 IM.

In January 2007 she transferred to Louisiana State University on a full athletic swimming scholarship, where she continued her swimming journey and broke the 200 butterfly record that was more than 20 years old in 2008. Till this day she still holds some of the fastest times in school history in 8 of the 16 events.

Vanessa moved to Houston in May of 2012 and has been in the clinical side of the medical field since. She has a great passion and love for helping people better their quality of life through nutrition, health and wellness. Vanessa is a certified Health coach through ACE and has experience in personal training, nutrition, wellness, lifestyle changes, bariatrics, hormones, dermatology, orthopedics, sports medicine, exercise physiology, exercise science, detoxification, and analyzing micronutrient testing to optimize athletic performance.