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.

Christina Meyer-Jax, MS, RDN, LDN, RYT

Scientific Advisor — Nutrition

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.

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.

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.

Jackie Masete

Marketing - Nutritionist

Jackie Masete’s LinkedIn profile

Jackie is nationally known as an evidence-based nutritionist, coach, and educator. Her expertise ranges from biochemistry to sustainable fat loss and improving diets for athletes. She holds a Bachelor's degree in Nutrition Science from Karolinska Institute and later continued her studies in sports nutrition, psychology, and marketing. Jackie started her career as a nutritionist within the supplement industry and later joined Lifesum's marketing team to help educate partners and influencers.

Kajsa Ernestam, RD

Product Manager — Nutrition

Kajsa Ernestam’s LinkedIn profile

Kajsa has been with Lifesum for years, first working as a dietitian (RD), then as a Product Manager of Nutrition, and now takes a leading role as a Product Owner, overseeing ideas and concepts become a reality to make members' lives easier. She has her Bachelor of Science in Dietetics, Registered Dietitian (RD), and works to help others eat healthier.

Frida Westman

Product Manager — Nutrition

Frida Westman’s LinkedIn profile

Frida worked as an in-house nutritionist at Lifesum before becoming a Product Owner for the company, developing and overseeing ideas become tools, features, and releases. She earned her Bachelor’s degree in Foodservice and nutrition at Uppsala University.

Valeria Lazakovich

Nutritionist assistant

Valeria Lazakovich’s LinkedIn profile

Valeria specializes in diet and nutrition with knowledge of nutrition from a molecular level to a public health perspective. She has expertise in how a diet affects the body, energy metabolism, and how nutrition can treat and prevent common public health diseases such as obesity, diabetes, cardiovascular disease, and cancer.