Stefani Sassos, M.S., R.D.N., NASM-CPT
Nutrition & Fitness Lab Director
Stefani (she/her) is a registered dietitian, a NASM-certified personal trainer and the director of the Good Housekeeping Institute Nutrition and Fitness Lab, where she oversees all nutrition and fitness-related content, testing and evaluation. She holds a master’s degree in clinical nutrition from New York University, as well as advanced certifications as a Women's Fitness Specialist and a Behavior Change Specialist. Stefani is dedicated to providing readers with evidence-based content to encourage informed food choices and healthy living. She is an avid CrossFitter and a passionate home cook who loves spending time with her big fit Greek family.
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Latest from Stefani Sassos, M.S., R.D.N., NASM-CPT

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Do Collagen Supplements Work? Experts Explain the Potential Benefits
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I’m a Nutrition Expert—These 10 High-Protein Foods Help You Stay Full
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What Is the Daniel Fast Diet Plan? Pros, Cons and Meal Ideas
Here's a list of everything you can (and can't) eat on this 21-day diet plan.

8 Best Folding Treadmills for Small Spaces, Tested by Fitness Experts
These space-saving picks are a game changer.

Experts Now Recommend More Plant Protein Over Meat for Heart Health—Try These Recipes
Pack in protein without meat or dairy.

What OB/GYNs and Dietitians Want You to Know About Perimenopause Supplements
Experts separate fact from fiction on perimenopause supplements.

Are Sardines Actually Healthy? The Answer Might Surprise You
Nutritionists weigh in on the popular tinned fish.

The Best Protein Powders for Women—for Muscle Gain, Weight Loss, and More
These RD-approved picks make getting enough protein way easier.

Feeling Overwhelmed? Try These 3 Daily Burnout-Prevention Habits
A clinical psychologist shares the everyday practices that help you stay resilient.