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

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


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 is a food science and nutrition specialist and works as an in-house nutritionist at Lifesum. She helps the Lifesum community understand food and the effect it has on our physical and mental health. She is currently pursuing her Master's degree in food science and nutrition and enjoys helping people make healthier eating choices.

Lisa Booth, MSHN, RDN

Registered Dietitian

Lisa Booth’s LinkedIn profile

Lisa is a registered dietitian nutritionist (RDN) with over 15 years of experience in nutrition, fitness, and mental health coaching and education. She studied Foods and Nutrition at San Diego State University and earned a Master of Science in Holistic Nutrition at Hawthorn University. She is dedicated to helping people implement healthy habits.