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

Good Housekeeping's Dietary Supplements Methodology
Here's how our health editors and nutrition experts decide which supplements to recommend.

11 Top Health Benefits of Coconut Water, According to Registered Dietitians
But is it good to drink it every day?

9 Best Supplements to Fight Inflammation
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Hungryroot Review: Our Honest Take On This Hybrid Meal Delivery Service
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10 Best Gluten-Free Pasta Brands, According to Nutritionists and Test Kitchen Pros
These gluten-free noodles taste like the real deal.

NordicTrack Commercial 1750 Review: Pros, Cons, Pricing, Features and More
Our Certified Personal Trainer shares her thoughts after testing this popular treadmill.

7 Best Baby Puffs, According to Dietitians and Parents
These rice-free puffs are approved by our tiny taste testers and nutrition pros.

The 2024 Good Housekeeping Best Fitness Awards
These top-tested workout winners offer perfect ways to empower any fitness journey.

When Is the Best Time to Take Ashwagandha — Morning or Night?
Here's how to maximize the health benefits of this popular supplement.

30 Best High-Protein Snacks to Buy, According to Dietitians
These store-bought snacks are nutritious and filling.

11 Best Kettlebells for Home Workouts, According to Personal Trainers
Elevate your training and home gym with these top-tested kettlebells.

Is the Optavia Diet Healthy? Dietitians Review the Plan and Food List
It might help you lose weight fast, but it can lead to some less-than-pleasant side effects.