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.
10 Best Organic Baby Food Brands, Tested by Dietitians and Parents
Our nutrition experts and tiny taste testers gave these baby purees the thumbs up.
Restaurant-Quality at Home? My In-Depth Review of CookUnity
Our registered dietitian and testers review the meal delivery service that foodies can't stop ordering.
The 10 Best Joint Supplements to Fight Pain
Achy joints? These registered dietitian-vetted vitamins and supplements may help.
9 Best Meat Delivery Services, According to Extensive Testing
We tested over 40 meat subscription boxes to find the best of the best.
Pumping Made Easier: My Favorite Wearable Breast Pumps as a Mom of 2
I nursed both babies for over a year. Here are my honest thoughts on the best hands-free pumps.
5 Best Neck Massagers for Instant Tension Relief
We tested over a dozen neck massagers and these picks stood out for their effectiveness, comfort and overall value.
Tried and Tested: The Best Prepared Meal Delivery Services for Busy Lives
Food experts and busy professionals tested these meal delivery services—see which prepared meals are worth your time and money.
The Best Vegan Meal Delivery Services, Recommended by Our Dietitian
From high-protein meals to gluten-free options, these vegan delivery services make eating plant-based easy and enjoyable.
What’s Keeping Kids (and Their Parents) Happy Right Now? These 18 Picks Stand Out
These Good Housekeeping 2025 Parenting Award winners were designed for growing kids — and they nailed it.
24 Toddler Products That Make Parenting Smoother
Toddlerhood is messy, memorable and full of milestones — and these Good Housekeeping 2025 Parenting Award winners will be there to support you every step of the way.
12 Trusted Products That Support Moms Through Pregnancy and Postpartum
These Good Housekeeping 2025 Parenting Award winners impressed both experts and real parents with their innovation, usefulness and impact.
I’m a Personal Trainer and These Are the Only Rowing Machines Worth Buying
Looking for a cardio machine that does it all? These top-tested rowers can help you train smarter.
I Tried a $1,850 Full-Body MRI. Here’s What I Learned About My Health.
How much would you pay for peace of mind?
9 Best Food Tracking Apps, According to Dietitians
Most have handy barcode scanners and AI photo tools for easy tracking.
I’m a Dietitian — Here's the One Thing I Drink Every Day (Besides Water)
This fermented beverage has been a part of my diet for years thanks to its rich nutritional benefits.
Hydrow Rower Review: Is It Worth the $2,195 Price Tag? A Personal Trainer Weighs In
As a fitness expert, I’m picky about equipment. The Hydrow impressed me, but it’s not for everyone. Here’s why.
The One Exercise Every Woman Over 50 Should Be Doing to Stay Strong
Learn how pushups support bone health, muscle tone and menopause wellness at any fitness level.
The Best Barefoot Shoes, Tested and Reviewed
As close as it gets to being barefoot without sacrificing protection.
Top-Rated Protein Bars That Actually Taste Good
No more label confusion! These dietitian-vetted protein bars skip the junk and still taste great, testers confirm.
20 High-Protein Air-Fryer Recipes Perfect for Busy Weeknights
Each one has 20 grams of protein (or more!) per serving.
10 Healthiest Energy Drinks, According to Nutritionists
Get the energy you need, without the junk. These low-sugar options are a healthier way to recharge.
Strengthen Your Core (the Fun Way) With These Weighted Hula Hoops
Add some nostalgia to your exercise routine.
How Many Calories Do You Burn Walking? Here's How to Calculate
Read this to easily figure out how many calories you'll burn on your next stroll.
I’m a Dietitian, and Here's What I Really Think About Daily Harvest
After its recall, I was skeptical — but I tested Daily Harvest’s meals again. Here’s my take.
I'm a Dietitian, and This Is the One Food I Eat Every Day
Walnuts are not only delicious, but they're packed with nutrition.
The Best Pilates Reformers for Every Home and Budget
Whether you're a beginner or advanced athlete, our fitness pros reviewed the best Pilates reformers to level up your at-home workouts.
Is It Better to Take L-Theanine in the Morning or Night? Here's What Experts Say
It really depends on what you're looking to get out of the supplement.
Can You Really Boost Your GLP-1 Naturally? Here's What Experts Say
Dietitians reveal how food and exercise may impact the hormone.
I Tested Over 50 Meal Delivery Services — These Are My Favorites
Blue Apron is my top pick, but I liked some more affordable options too.
The Best Cereals, According to Dietitians
We asked dietitians to spill their go-to cereals. These deliver on taste, nutrition and crunch.
30 High-Protein Chicken Recipes With 30+ Grams of Protein per Serving
Did we mention they taste good, too?
The Best Under-Desk Treadmills for a Healthier Workday, Reviewed by Personal Trainers
From quiet walking pads to budget-friendly picks, these under-desk treadmills make it easy to stay active at home without sacrificing space or style.