Meet the inStriv Team

Our weight loss journey began in June, 2013 when a weight loss division was started within the medical practice of Twin Hills Health Center in Muncy, PA. We were passionate about helping our community lead healthier and happier lives. In 2018, we expanded our offices throughout NorthCentral Pennsylvania and separated weight loss into its own entity. In 2020, we found we could expand beyond our geographic boundaries and serve our clients both in person and virtually. With that vision – our new program inStriv was born!

Our mission continues to help our clients lose weight quickly, naturally, and in a healthy sustainable way.


JoAnise Leighow

With a passion to help others lead a healthy lifestyle, JoAnise earned her Therapeutic Weight Loss certification and worked alongside her husband Dr. Jamie Leighow, to start a weight loss division within his medical practice. Since 2014 they have helped thousands of people lose weight and keep it off with a natural, sustainable weight loss program. JoAnise strives to live out these same ideals in her personal life with her husband, daughter (Jayden) and son (Justus).

Diane Freynik

Diane is a graduate of The Pennsylvania College of Technology with a degree in Food and Hospitality Management, and a specialization in Culinary Arts. She became focused on weight loss and nutrition after the birth of her third son – a pregnancy that left her 60 pounds heavier. Knowing how hard weight loss can be, Diane is passionate about nutrition, health, and wellness, and empathic with our clientele, as she has walked in their shoes.

Jessica Ryan

Jessica Ryan earned her Bachelor’s Degree in Business Administration specializing in Human Resources from Ashford University. With four children of her own, she knows a foundation of good nutrition, health, and wellness are a priority; and as a former gymnastics coach, she was also able to share with her students the importance of maintaining overall good health. Jessica is certified in weight loss counseling as a Therapeutic Weight Loss Expert and enjoys seeing our clients make healthy changes in their lives.

Elizabeth Greco

Elizabeth is a graduate from Marywood University with a Bachelor’s Degree in Nutrition and Dietetics. She has had a passion for healthy living and weight loss from a young age. Elizabeth believes in improving people’s health through the power of nutrition, The mission of inStriv aligns with her values of instilling a lifelong approach to improving lifestyle. In her free time, Elizabeth enjoys horseback riding and cooking at home.

Laura Lowmiller

With her focus having been emergency medicine as a registered nurse, Laura Lowmiller is dedicated to helping clients navigate the incredibly crowded and confusing wellness space through her knowledge of nutrition with medication management. Laura is passionate about delivering science-based research with practical and safe methods that are easy to apply to every day living. Laura and her husband have two small boys.

Abby Wiles

Abby earned her bachelor’s degree in Nutrition & Dietetics from West Chester University in 2020 and passed her RD exam shortly after. Abby has always had a passion for nutrition and wellness and has always made this a priority in her own life. This led to her love and passion of guiding other’s in reaching their health goals. In her free time she enjoys cooking, hiking, and spending time with her family and friends.

Mary Beth Tranovich

Mary Beth began her career path as a Registered Dietitian by earning her bachelor’s degree in Nutrition and Dietetics from Immaculata University, followed by a Master’s degree in Nutrition from Marywood University. After six years of schooling and passing her RD Examination in 2020, Mary Beth earned her status as a Registered and Licensed Dietitian and began her passion for Nutrition counseling and coaching. She is dedicated to positively impacting others through her knowledge of food and nutrition. Mary Beth enjoys running, baking, and spending time with her husband on their family’s farm and homestead.