Meet Our Providers

Dr. Pero was born and raised in Baton Rouge, Louisiana, and comes from a long lineage of accomplished, well-respected physicians. Surrounded by strong, supportive women throughout her life, she naturally gravitated toward medicine and developed a deep passion for women’s healthcare, ultimately specializing in Obstetrics and Gynecology.

Dr. Roxanne Pero earned her M.D. from Louisiana State University Health Sciences Center in New Orleans and completed her residency at the University of Texas Southwestern/Parkland Memorial Hospital in Dallas. She is board-certified by the American College of Obstetrics and Gynecology. With years of experience in private practice, Dr. Pero specializes in Obstetrics, Gynecology, and Infertility, providing care to thousands of women and supporting families through high-risk pregnancies. She is a Diplomate and Fellow of the American College of Lifestyle Medicine. Additionally, she is board-certified in Functional Medicine through the Institute of Functional Medicine.

During her own infertility journey with her husband, Dr. Pero was diagnosed with Endometriosis, Uterine Fibroids, Hormone Imbalance, and Idiopathic Thrombocytopenic Purpura — none of which “ran in her family.” This pivotal moment led her to recognize the limitations of relying solely on Western Medicine, while discovering the powerful advantages of Integrative, Lifestyle, and Functional Medicine.

After incorporating targeted nutrition, supplements, acupuncture, and whole-body support alongside modern fertility treatments, she was able to conceive. She and her husband went on to have three biological children and adopted their fourth. By embracing a Functional Medicine lifestyle through personalized nutrition and supplementation, regular movement, sleep, and stress optimization, and other foundational pillars of health, she has remained symptom-free from Endometriosis and Uterine Fibroids without surgical intervention or hormone therapy.

Dr. Katie Keller is a board-certified physician, health innovator, and leader who blends the precision of modern medicine with the wisdom of holistic healing. With a background in longevity, functional medicine, and integrative wellness, she empowers patients to achieve their optimal health and vitality. Rooted in both science and intuition, her approach is guided by a deep belief in transformation, purpose, and the art of attentive, individualized care.

Practicing in Austin, Texas for over a decade, Dr. Keller grew up in the Midwest and earned her Bachelor’s degree in Biomedical Sciences from Western Michigan University. She went on to attend the Virginia College of Osteopathic Medicine in Blacksburg, Virginia, before completing her residency training in Corpus Christi, Texas. She has continued her education with the Institute for Functional Medicine and has extensive experience in natural thyroid management, bioidentical hormone therapy, fertility, regenerative medicine including peptides, as well as cutting-edge diagnostics and therapeutic approaches.

Dr. Keller believes that nutrition, movement, stress management, and mindfulness form the foundation of healing, and integrates these pillars into her personalized approach to care. She collaborates closely with her patients to help them achieve their health and wellness goals. Drawing on evidence-based practices and a commitment to whole-person care, she is dedicated to guiding individuals through transformative, personalized strategies for lasting well-being.

Outside of her clinical work, Dr. Keller enjoys life in Austin with her daughter, their mini goldendoodle, and (often) an additional rescue animal. She enjoys cooking, trail running, dancing, yoga, and Austin’s vibrant live music scene. Dr. Keller looks forward to being part of your journey toward vibrant health and a thriving life!

Lauren Colletti, FNP, is a board-certified Family Nurse Practitioner and Functional Medicine clinician with nearly 20 years of experience in healthcare. She first earned her undergraduate degree in Environmental Sciences from Washington University before completing her Nursing Degree, Master’s in Public Health Nursing, and Family Nurse Practitioner training at the University of Texas.

Lauren is board certified in functional medicine through the institute of Functional medicine along with advance training in anti-aging and longevity medicine, bio-identical hormone replacement therapy (BHRT), and peptide therapy. While she has deep expertise in women’s health and midlife transitions, her practice supports adults across all stages of life with a focus on hormonal health, metabolic and thyroid function, autoimmunity, longevity and emotional intelligence. Her approach combines comprehensive diagnostics with personalized, root-cause care—helping patients move from reactive symptom management to proactive health optimization.

As Clinical Director and Co-founder of the clinic at Alive + Well, Lauren is known for delivering precise, science-backed care while simplifying complex health concerns. She believes optimal health is built through personalized medicine, deep listening, and a long-term strategy for resilience and vitality. A wife and mother of three, Lauren brings both clinical expertise and lived experience to her work, guiding patients to feel strong, confident, and well at every stage of life.

Continuing a family tradition of medicine, Svetlana knew she wanted to be a physician by age 13. She is deeply passionate about patient healing, with a primary focus on uncovering root causes. While she first addresses symptoms to provide relief, Svetlana then works methodically to identify underlying imbalances, helping patients heal from within and achieve lasting results.

Svetlana earned her MD from the 2nd Moscow State School of Medicine in 1986, then practiced as a general pediatrician before specializing in pediatric hematology. After immigrating to California, she earned her Master’s degree as a Physician Assistant from Samuel Merritt College in 2006, going on to work in endocrinology and internal medicine while also serving as a co-investigator on clinical trials. In 2017, Svetlana discovered functional medicine, which transformed her approach, then earned Functional Medicine Provider status in 2018 through the University of Functional Medicine.

This combination of knowledge in both Western and functional medicine allows Svetlana to better understand the root cause of patients' problems. Her areas of focus include gut health, genetics, hormone replacement therapy for men and women, thyroid disorders, autoimmune conditions, mold illness, and Lyme disease. She is additionally an ILADS (International Lyme and Associated Disorders Society) trained provider.

Daniel Chege is a Board-Certified Family Nurse Practitioner and a leader in integrative medicine, dedicated to uncovering the root causes of complex health challenges. With a unique academic foundation in computer and mechanical engineering, Daniel approaches the human body with a systems-thinking mindset analyzing how every biological process interconnect to achieve optimal performance.

Originally from Kenya, Daniel’s journey into healthcare was driven by a passion for finding lasting solutions where traditional models often fall short. After relocating to the U.S. in 2008, he earned his BSN from Mountain State University and refined his clinical expertise in surgical ICU critical care. He later earned his Master of Science in Nursing from the Franciscan University of Steubenville and holds national certification through the ANCC as a Family Nurse Practitioner. Furthermore, he is a Functional Medicine Certified Practitioner (FMCP-M), reflecting his specialized training in identifying and treating the underlying drivers of disease.

In a field often bound by rigid protocols, Daniel understands that medicine is rarely black and white. He thrives in the gray area of healthcare, meeting patients exactly where they are, whether they are navigating the complexities of chronic illness or are currently healthy and looking to optimize their performance and longevity. He approaches every case with a clinical philosophy rooted in integrity and humility, placing the patient’s lived experience at the center of the diagnostic process.

Known for his gentle bedside manner and high success rates with hormone optimization, thyroid dysfunction, PCOS, and adrenal fatigue, Daniel creates highly personalized treatment plans. By blending cutting-edge science including peptides, nutraceuticals, and IV therapies with a deep respect for the body’s intuitive healing, he helps his patients harmonize their physical and mental health for a richer, longer quality of life.

After years of struggling with her own healing journey, Melanie found powerful tools to successfully keep her autoimmune in remission and maintain the lifestyle changes that saved her life. Now, she loves sharing and offering guidance with others who are seeking optimized health, and is certified through the Nutritional Therapy Association. Melanie takes a mental health approach to what she does and makes sure to meet you where you’re at, to create sustainable changes that will help support regulation no matter your lifestyle. There’s no one-size-fits all and every client’s plan is different.

Melanie wants people to know that healing is possible and healthy food doesn’t have to be boring! Over the past decade, she has healed from mold illness, SIBO, Epstein-Barr virus, and symptoms like chronic fatigue, bloating, and consistent pain. Since healing, she’s been able to help clients all over the world put their puzzle pieces together to find freedom from unwanted symptoms without sacrificing what they love about their life. She feels as if her experience with chronic illness has led her down this path to help others and that it is her true calling on this earth. Melanie’s specialties include: mold toxicity, autoimmune, leaky gut, nervous system regulation, and brain rewiring. She’s personally passionate about trauma recovery, spiritual healing, and helping you find the right path to be free from illness. rivers of disease.

Jenny’s work is deeply shaped by lived experience. After navigating her own journey with mold toxicity, Lyme, MCAS, and complex chronic symptoms, she understands firsthand how confusing, isolating, and overwhelming healing can feel. That experience didn’t just spark curiosity—it created a calling to help others feel more empowered, informed, and supported in their own health journeys.

Originally trained as an elementary teacher at the University of Texas at Austin, Jenny brings a natural educator’s mindset to her work—breaking down complex concepts, meeting people where they are, and translating information into practical, sustainable action. What began as personal research evolved into a deep, hands-on understanding of how nutrition, metabolism, nervous system regulation, and lifestyle factors intersect to shape how we feel day to day.

Jenny is a certified Health & Nutrition Coach through Precision Nutrition and has guided hundreds of individuals through personalized health coaching, supporting everything from chronic illness and hormonal balance to metabolic health, fertility, and long-term behavior change. She blends evidence-based nutrition with compassion and a holistic lens, helping clients move beyond rigid food rules and build approaches that feel realistic, regulating, and sustainable for real life.

With over 15 years of nursing experience, caring for patients of all ages, Rebecca has a strong foundation in family practice, where she has spent the majority of her career supporting individuals and families in their health journeys. 

After earning her Master of Science in Nursing from the Louise Herrington School of Nursing at Baylor University in Dallas, Rebecca’s passion for functional medicine was sparked by personal health experiences and genuine intellectual intrigue, which led her to pursue certification through the Institute for Functional Medicine.

Dedicated to helping patients thrive in their pursuit of optimal health, she’s committed to building collaborative partnerships with her clients. Through education and shared decision-making, she aims to honor each individual’s unique needs and goals. Her clinical interests include hormone optimization, weight management, and preventive care for lifelong wellness.

Lainey Mounce is a Certified Integrative Nutrition Health Coach based in Dallas, Texas. Her personal journey with food sensitivities and challenges related to gut and hormone health sparked a deep passion for guiding others through similar wellness struggles. In addition to supporting those with chronic illness, Lainey is committed to educating others on how to optimize their health through lifestyle, whole-food nutrition, and balanced living.

Lainey holds a degree in Leadership with a minor in Health Science and Nutrition & Business courses from Texas A&M University. She went on to earn her certification as an Integrative Nutrition Health Coach through the Institute for Integrative Nutrition (IIN). Her career began at Texas A&M, where she served on the Performance Nutrition Staff, working directly with athletes. She later worked at the Cooper Clinic as a Patient Services Specialist, acting as a liaison between doctors and patients. Most recently, Lainey served as the Lead Nutrition Coach for a large health and fitness company, where she supported numerous clients in developing a balanced approach to wellness rooted in whole-food nutrition.

Motivated by a deep desire to help others live healthier lives, Lainey enjoys continuing her education in areas such as skin health, nervous system regulation, self-care practices, and holistic wellness.

In 2020, Lainey faced her own health crisis following a two-year course of low-dose antibiotics. This experience led to significant health challenges, including gut dysbiosis, skin issues such as severe acne, digestive discomfort, and a two-year disruption of her menstrual cycle. Rather than becoming discouraged, Lainey immersed herself in research and implemented gut-healing practices to restore her health—an experience that continues to inform and inspire her work today.

Lainey brings empathy, knowledge, and dedication to every client she serves. She is passionate about the power of nutrition and lifestyle to transform overall well-being. Outside of her professional life, she enjoys teaching fitness, taking dance classes, cooking, and spending time with her friends & family.