WELCOME TO KEY NUTRITION
Concierge Nutrition, From Philadelphia to The World
Distinguished medical nutrition therapy, executive health, and performance wellness — delivered with the depth, discretion, and unhurried attention you would expect of a trusted advisor.
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SIGNATURE SERVICES
Explore Our Practice
Each service is built around the same standard — quiet, personalized excellence.
PERSONALIZED PLANS
Meal Plans
Custom meal plans designed around your preferences, restrictions, and goals.
PARTNERSHIPS WITH PURPOSE
Collaborative Initiatives
Trusted partnerships with Penn Medicine, corporate teams, and community organizations.
PRECISION HEALTH
Genetic Testing
3X4 Genetics analysis, translated by your dietitian. Information is power.
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MEET YOUR DIETITIAN
Olena Zinshtein, RD, LDN
Founder of Key Nutrition LLC · In Private Practice Since 2010
Olena Zinshtein is a distinguished Registered Dietitian-Nutritionist who has built a career without borders — from the bedside to the boardroom, and from Philadelphia to wherever in the world exceptional nutrition is needed most. Her practice is rooted in personalized and concierge nutrition, executive health, and performance wellness, with the kind of thoughtful, unhurried attention that has become her hallmark.
Olena serves as a Registered Dietitian Nutritionist partner for Penn Passport and the Penn Medicine Executive Health Program, equipping busy executives and their families with high-level care and preventative wellness through comprehensive evaluations and tailored plans. She also dedicates her time to mentoring the next generation of dietetic professionals, teaching the fundamentals of nutritional counseling and functional foods.
When she is not with clients, Olena is living the philosophy she teaches — exploring the world, seeking out the finest local ingredients, cooking meals that are as nourishing as they are beautiful, and staying active in the ways that bring her genuine joy.
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LATEST FROM THE JOURNAL
From The Blog
Recipes, research, and reflections from the Key Nutrition family.
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INSURANCE & TRUSTED PARTNERS
Accepted Plans
Key Nutrition is in network with major insurance plans — including Aetna, Blue Cross Blue Shield, Independence Blue Cross, Cigna, and Medicare — which may cover the full or partial cost of your visits. Genetic testing is HSA and FSA eligible, allowing you to invest in your wellness with pre-tax funds.
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FOR FORWARD-THINKING ORGANIZATIONS
Let’s Work Together
Key Nutrition partners with corporations, schools, and community organizations to deliver dynamic, science-backed wellness programming — keeping teams engaged, healthy, and informed.
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STAY CONNECTED
Subscribe to the Journal
Wellness reflections, seasonal recipes, and quiet insights from the practice — delivered to your inbox.
