Health advisors and nutritionists

Our health advisors and nutritionists are experts in their field and dedicate their work to helping communities learn healthier eating habits, eat balanced diets, and achieve their goals in sustainable ways, whether it's weight loss, a more active lifestyle, or muscle building and weight gain. Get to know our team and discover their impressive credentials.

Advisory board

Our health advisory board members have extensive experience in health and nutrition. They lend their knowledge and skillset to our team to ensure you receive up-to-date and accurate information.

Alona Pulde and Matthew Lederman

MDs, Published Authors, and Co-founders of Kinectin.com

Alona Pulde and Matthew Lederman’s LinkedIn profile

Dr. Alona Pulde is a board-certified practitioner of Acupuncture and Oriental Medicine and Family Medicine Physician. Dr. Matthew Lederman is a board-certified Internal Medicine physician and Certified Nonviolent Communication Candidate. They specialize in reversing disease using nutrition and lifestyle medicine and created the lifestyle-improvement program used in their private medical center and Whole Foods Market Medical & Wellness Centers. 

They were featured in the film Forks Over Knives, lectured for eCornell, and co-authored the New York Times Bestseller Forks Over Knives Plan, Forks Over Knives Family, and Keep It Simple, Keep It Whole. 

Andrew Zimmermann

Founder, Behavior Design Collective

Andrew Zimmermann’s LinkedIn profile

Andrew is a Behavior Change expert. He studied under leading Behavior Scientist Dr. BJ Fogg at Stanford University, advises research in the Behavior Design Lab, lectures on behavior change for wellbeing, and founded Behavior Design Collective to consult companies on how to change behaviors sustainably at scale.

Christina Meyer-Jax

MS, RDN, LDN, RYT

Christina Meyer-Jax’s LinkedIn profile

Christina is a nationally recognized food and nutrition expert, strategist, and educator!  She has extensive experience and recently worked with the Google Food program as the Global Director of Food Choice Architecture and Nutrition. She is excited to partner and expands opportunities with Lifesum to empower and simplify health for their members.

Lifesum nutritionists

The in-house Lifesum nutritionists study and practice all aspects of diet, healthy living, exercise, and overall wellbeing. They put their knowledge and expertise to use in our recipes, social posts, and all other forms of communication. Get to meet our incredible team and learn more about them and their work!

Signe Svanfeldt

Food science & Nutritionist

Signe Svanfeldt’s LinkedIn profile

Signe Svanfeldt is a distinguished nutritionist and food science specialist, serving as Lifesum’s esteemed Lead Nutritionist. With a wealth of expertise, she dedicates herself to empowering the Lifesum community with insights into the intricate relationship between food and its impact on both physical and mental well-being. Signe is passionately committed to assisting individuals in making informed, health-conscious dietary choices, fostering a culture of vitality and longevity. Her unwavering dedication to promoting holistic wellness through nutrition exemplifies her status as a revered authority in the field.

Rebeka Bereczky Veress

RDN, MSc

Rebeka Bereczky Veress’s LinkedIn profile

Rebeka is a registered dietitian nutritionist (RD) with experience in clinical nutrition, specializing in obesity, kidney disease, and oncology. She holds a Master of Science degree in Food Science from Umeå University with coursework including Sports Nutrition, Nutrition During Breastfeeding and Pregnancy, Nutrition After Bariatric Surgery, and Physical Activity for the Prevention and Treatment of Diseases. Her MSc thesis explored the importance of whole grain intake for health and disease prevention. Passionate about spreading nutritional knowledge, she is dedicated to helping individuals develop sustainable and balanced eating habits that support long-term health.

Samantha Peyke

Nutritionist

Samantha Peyke’s LinkedIn profile

Samantha Peyke is a seasoned expert in metabolism and nutrition, with over a decade of experience in the field. Her expertise spans personalized nutrition strategies, metabolic analysis, holistic health approaches, and behavioral optimization to support sustainable lifestyle changes. Through her work, Samantha is dedicated to helping individuals achieve a healthier, more balanced lifestyle by aligning nutrition with their personal health goals.