Registered Dietitian Nutritionists | Torrance Memorial | South Bay

Meet Our Nutrition Team

Andrea GuastamacchioAndrea Guastamacchio, RDN, CDE

Andrea became interested in the field of nutrition after learning how food can be used to prevent and manage many diseases. She was excited by the prospect of helping the community become more proactive and knowledgeable about using food as medicine. Andrea is a proud graduate of California State University, Long Beach where she completed her Bachelor of Science in Nutrition and Dietetics. She went on to complete her Dietetic Internship at New York Institute of Technology. Andrea is a Registered Dietitian Nutritionist and Certified Diabetes Educator; she has worked in the Outpatient Diabetes Education Program and the Medical Nutrition Therapy Office at Torrance Memorial for over 16 years and currently teaches the nutrition classes for Torrance Memorial’s Diabetes Self-Management Training Program. Andrea specializes in Diabetes education as well as sees clients for weight management, hypertension, chronic kidney disease, heart healthy lifestyle modifications and more. She enjoys helping clients make lifestyle changes and learning their stories to help them succeed. She is a mom who loves eating and cooking delicious and healthy food with friends and family. She also enjoys what the California lifestyle offers: lots of fresh produce, sunshine, and the beach!

Christian TorresChristian Torres, RDN

Christian is a Registered Dietitian Nutritionist with an “All Foods Fit” philosophy. His interests are in disease prevention, diabetes management, general wellness, weight loss and sports & performance nutrition. Christian has an equal passion for health management through fitness, holding a Personal Training Certification from the National Academy of Sports Medicine (NASM). Over the years, Christian has developed a passion for counseling using strategies such as motivational interviewing, which essentially places the client in the driver’s seat of their nutrition journey. Christian earned his Bachelor of Science degree in Nutrition and Dietetics from Long Beach State University. Aside from growing up and living in Southern California, he lived in Columbus, Ohio where he completed his Dietetic Internship at the Ohio State University. He is bilingual (English/Spanish) extending his expertise to the large Spanish-speaking population in the South Bay and beyond. During his free time, he enjoys exploring new cultural foods, spending time hiking & backpacking, and attending live music shows with friends.

Noel LeNoel Le, RDN

Noel is a Registered Dietitian Nutritionist who aims to heal and nourish by guiding clients to make healthy diet and lifestyle changes. She is a graduate from the University of Minnesota, Twin Cities and completed her dietetic internship through the University of Minnesota Medical Center. Working at Torrance Memorial, she enjoys navigating the unique challenges presented by both inpatient and outpatient care, combined with serving a diverse client population. In her experience, she has worked with an array of conditions/illnesses including cancer, kidney disease, gastrointestinal disorders, malnutrition, and pre-diabetes. Noel is also passionate about continuing to build on her expertise involving metabolic and bariatric surgeries and adult weight management. She has spoken at various community events and currently leads community classes including pre-operative and post-operative nutrition classes for bariatric patients and CORE4 adult weight management classes. In her free time, she enjoys exploring new places, being a plant-mom, and daydreaming about the day she can finally adopt a furry four-legged pup.

Kristen HungKristen Hung, MPH, RDN

Kristen is a Registered Dietitian Nutritionist who has a passion for disease prevention through nutrition and for helping clients develop a healthier relationship with food. She graduated from the University of California, Berkeley with a Bachelor of Science degree in Nutritional Science/Dietetics and completed her Master of Public Health degree at the University of California, Los Angeles. Kristen completed her dietetic internship at the VA Greater Los Angeles Healthcare System where she subsequently served as an inpatient clinical dietitian. Kristen now serves at Torrance Memorial in both inpatient and outpatient capacities. As part of the Medical Nutrition Therapy team she specializes in adult weight management and bariatrics, and also provides consultation for chronic diseases including lipid disorders, hypertension, pre-diabetes, gastrointestinal disorders, and more. She frequently leads classes for pre-diabetes, adult weight management (CORE4), and pediatric weight management (Healthy Ever After), and often speaks at community events. Kristen enjoys creating fun and healthy meals for her family and being a mom to her two young daughters. In her free time, she might be found dancing, reading, or enjoying the outdoors.

Brianna ChangBrianna Chang, RDN

Brianna is a registered dietitian nutritionist who is passionate about educating and equipping patients with the tools to promote health and nutrition. She graduated from Pepperdine University with her Bachelor of Science degree in Nutrition and continued her education at Pepperdine where she completed her dietetic internship, serving at community sites throughout Los Angeles. She has worked in dietetics for 7 years in inpatient, outpatient, and private practice settings. She is excited to be a part of the inpatient clinical team at Torrance Memorial and also teach outpatient Cancer & Nutrition classes. She also works as an inpatient dietitian at St. John’s Health Center in Santa Monica where she is a member of the oncology committee. Through her work in private practice, she developed a deeper appreciation for the unique relationship healthcare practitioners have with their patients and she strives to achieve this with all of her patients. When she isn’t working with patients, you can find her spending time with her husband and son, exploring all the beaches, parks, and hiking trails Southern California has to offer.

Michele Manarino, RDN

Michele Manarino, MS, RDN

Michele is a Registered Dietitian Nutritionist with a passion for teaching people how to intuitively listen to their bodies. She has worked in the field of nutrition since 2000.  She has extensive experience working with patients diagnosed with eating disorders in residential, hospital, and office settings. Michele earned her Bachelor of Science degree in Food and Nutrition at San Diego State University. She completed her Master of Science in Nutrition and Dietetic Internship at California State University, Long Beach. She has been a part of the Torrance Memorial team for 15 years as the primary dietitian for the Eating Disorder Medical Unit.  Additionally, she sees private practice patients focusing on disordered eating, wellness, family nutritional counseling, adolescent nutrition and sports nutrition.  She especially enjoys working with adolescents and young adults. She is also a nutrition professor at Mount San Antonio College. During her free time, Michele enjoys hiking, cooking and reading.

Sonia VillaseniorSonia Villasenor, RDN

Sonia is a Registered Dietitian Nutritionist who has been working at Torrance Memorial for 25 years. She specializes in oncology patients and her goal and passion is helping cancer patients meet their nutritional needs using evidence-based recommendations. Sonia’s counseling incorporates topics including prevention of weight loss, maintenance of optimal nutrition status during cancer treatment, and managing treatment side effects (taste changes, mouth sores, nausea, vomiting, diarrhea) to improve clinical outcomes and quality of life. If needed, she can provide recommendations for nutrition support including tube feeding and parenteral nutrition support. Sonia also has experience with conditions including hypertension, diabetes, and gastrointestinal disorders and is building on her knowledge of metabolic and bariatric surgeries as well. Sonia earned her Bachelor of Science degree in Nutrition and Dietetics from California State University, Long Beach. She completed her Dietetic Internship at Utah State University. Sonia is bilingual (English/Spanish) and can provide nutrition education to Spanish speaking patients. She loves spending quality time with her two children and her adorable granddaughter. She also enjoys cooking, exercising, and going on long walks by the beach.

Maggie O'MearaMaggie O'Meara, MS, RDN

Maggie is a Registered Dietitian Nutritionist with a mission to re-shape clients’ nutritional mindset and behaviors to optimize long-term health and reduce the likelihood of obesity or chronic diseases. She has a passion for empowering people to feel as good as possible through food with a viable and sustainable approach. Maggie earned her Bachelor of Science degree in Nutrition, Dietetics, and Food Science at Utah State University, where she competed on the Division 1 women’s tennis team for all 4 years. She subsequently completed her Master of Science in Nutritional Science and Dietetic Internship at California State University, Long Beach. She is excited to be serving as part of the Torrance Memorial Medical Nutrition Therapy team to provide expert care in both inpatient and outpatient roles. She is also currently an instructor for Torrance Memorial’s CORE4 Adult Weight Management and pediatric weight management (Healthy Ever After for Kids) programs. Maggie is a committed professional dedicated to improving dietary and wellness habits for people of all ages and conditions. Outside of work, she enjoys practicing yoga on the beach, playing tennis, frequenting farmer’s markets, and exploring coffee shops.

Contact the Nutrition Team

Our dedicated team is available Monday through Friday from 8:30am – 5pm.


Related Events

  • Aug
    6:00 PM - 7:00 PM
    Meet with a registered nutritionist and learn new topics every month to provide inspiration, encouragement, and helpful tips to keep you on track.
  • Aug
    4:00 PM - 5:00 PM
  • Aug
    5:00 PM - 6:00 PM
    This virtual series will provide general information and recommendations on cancer and nutrition.