Our Practitioners


Theresa Groskopp, CN
Theresa Groskopp

Theresa Groskopp opened a nutritional counseling and consulting practice in her Appleton-area home after obtaining her Certified Nutritionist designation in 2004. She acted on her concern over seeing so much chronic illness in the Fox Cities and beyond, and her strongly held belief that "Your health is the best investment you'll ever make."

Previously, Theresa worked in the medical and social service fields after receiving a BA in Business from UW-Oshkosh — a valuable foundation for what happened next. With her ever-increasing interest in health, she juggled work and studied nutrition. She completed the Certified Nutritionist Program with the American Health Science University, National Institute of Nutritional Education.

After her home-based practice was started, client interest set in motion the retailing of nutritional supplements in her office along with the creation of a website and online store for Natural Healthy Concepts. She also gave nutritional lectures locally with area groups and offered employee wellness information to local businesses.

Natural Healthy Concepts grew steadily, largely due to Theresa's steadfast passion — she firmly believes that the foundation of health and wellness lies in proper nutrition. Today, the business offers close to 20,000 products on its website, many of which are available at the two retail stores/nutrition practice locations in Appleton and Fond du Lac.

Every product at Natural Healthy Concepts is still rigorously curated and selected by Theresa. She continues to seek out reputable brands whose supplements are scientifically researched and clinically studied, and contain the purest ingredients. It is also important to Theresa that these companies follow Good Manufacturing Practices (GMP) and utilize socially responsible practices in the manufacture of their offerings (e.g., non-GMO, sustainably produced, cruelty free, etc.). She also goes to great lengths to avoid products with artificial sweeteners, colors and flavors, as well as those with chemical preservatives.

Having fulfilled her small dream with the success of Natural Healthy Concepts, Theresa continues to stay involved with the business, while also taking time to enjoy the great outdoors, her family and her good health.

Angela Halderson, RD
Angela Halderson

Angela Halderson was born in Neenah, Wisconsin and was raised as a part of a traditional American family eating a Standard American Diet (SAD). After developing a growing interest in nutrition and learning how proper food choices can help people achieve optimal wellness, she graduated from the University of Wisconsin at Green Bay with a Bachelor’s of Science degree in Human Biology with a Human Nutrition Emphasis. She completed her dietetic internship through Priority Nutrition Care Distance Dietetic Internship and is a member of the Academy of Nutrition and Dietetics, the Wisconsin Academy of Nutrition and Dietetics, Dietitians for Integrative and Functional Medicine and is a graduate of the Integrative and Functional Nutrition Academy. Angela is a certified health coach with experience providing nutritional counseling to patients in an intimate wellness clinic setting on topics including Diabetes, Cardiovascular Disease, Digestive Disorders, Hypertension and stress reduction. She has led clients on grocery store tours, lectured large groups on health education and performed cooking demonstrations.

Angela focuses on integrative and functional nutrition using a holistic and client centered approach to wellness. She believes restoring optimal wellness is possible by treating the whole person, not a disease. She has helped clients improve their health through better food and supplement intake, developing a better response to stress, and helped them remove toxins from their environment.

Angela devotes her free time to traveling with her family and can often be found walking her dog.