Our Most Requested Services

77 Nutrition Diet Fitness


Whether you want to age gracefully, or have dietary restrictions, we want to help design a plan that helps you achieve your goals!

Stay forever young with…


Weight Loss & NutritionAL Counseling

We help you get to your goal weight, and most important teach you how to maintain it for years to come!

Transformations happen with…



Our founder is a bodybuilding bikini champion who started her practice in the industry. We help competitive athletes wanting an extra edge over their competition.


Meet The Team

77 Nutrition Diet Fitness Polina

Our Founder, Polina Petrusevich

Certified Nutritionist. Precision Nutrition Level 1 and 2, NASM CPT and Sports Nutrition, NESTA PT, TRX, Les Mills CX-Works Instructor.

Polina is the owner and founder of 7.7 Nutrition and is one of the Certified Nutritionists on the team. She has over 10 years of experience working in the Nutrition field as a Certified Nutritionist and a Weight Management Consultant. She is a former Bikini and Fitness Competitor and Champion. A former personal trainer, a gym owner, Polina knows what it takes to help you reach your goals.

Polina’s nutrition team works with professional athletes, holistic nutrition & pediatric clients just to name a few. With extreme attention to detail, Polina is very selective with the type of professionals she adds to the team, and together they are one big family that works very hard to make a difference!

Polina loves cats and one day aims to open a hospital for homeless animals.

Tampa, FL

Gabby + Jessica changed my life!! I seriously cannot recommend 7.7 Nutrition more highly – they are the absolute best and really go above and beyond to get to know you, help you, listen to you, and make you feel like you are making great progress no matter how much or how little it really is. I was so afraid to start the journey with them because I felt ashamed that I needed to get help for my weight, but they always made me feel welcomed, important, and encouraged me to keep going and making progress. Gabby and Jessica helped me lose almost 40 pounds in about 4 months with very little exercise and I cannot thank them enough for helping me get my confidence and life back!!!

Ellie Severson

77 Nutrition Diet Fitness

Jessica Grafft

Director of Operations, Certified Nutritionist, B.S. Human Performance

Jessica is a graduate of the University of Tampa with a Bachelor of Science Degree in Human Performance, Exercise Science & Sports Studies. Her scope of clients as a Nutrition Technician are; professional athletes, youth athletes, and general weight loss.

As a Certified Life Coach, she specializes in working with behavior modification and accountability. Her passions include Lightning hockey and a strong cup of coffee.

77 Nutrition Diet Fitness

Gabby Singer

Certified Nutritionist & Sports Performance Specialist, M.S., B.S. Health & Physical Education 

Gabby graduated from Monmouth University, where she was a Division I basketball player, with a Bachelor’s Degree in Health and Physical Education as well as a Master’s Degree in Business Administration.

As a multi-sport athlete, Gabby learned the value of training and proper nutrition growing up in her family’s sports performance facility in Pennsylvania. This experience shaped her passion to help others perform at their best. Gabby also holds a Precision Nutrition Coaching Certification, and a love for almond butter and Penn State Football. She LOVES donuts and can’t live without coffee!

77 Nutrition Diet Fitness Brittney Boyd

Brittney Boyd

Certified Nutritionist

Brittney is a Nutrition Technician for 7.7 Nutrition Office. She has 5+ years of experience in the medical field and has transitioned her skills and love for health into nutrition.

Her passion is in helping others and making positive changes in their life. Brittney is caring and nurturing and loves encouraging her clients to improve their lifestyles. Growing up, she was a youth athlete in competitive cheerleading as well as archery hunting.

W Bloomfield, MI

This team is amazing. Laura helped me figure out a plan that worked with my lifestyle. I originally only wanted to lose weight by dieting however I was able to walk away with a whole new outlook on nutrition. Taking the food sensitivity test identified which items to stay away from and my body has thanked me by literally shedding the weight almost immediately (could notice the difference within 2 weeks)! 10/10 would recommend

Brittney Rawlings

77 Nutrition Diet Fitness

Joanna Dabish

Nutrition Assistant

Administrative Coordinator and everyone’s favorite go-to girl. She is the “behind the scenes hero”, helping our team to stay organized and ready to provide exceptional care to our Michigan clients.

She is completing her B.S. in Health Science with a concentration in Nutrition, and her passion for health has led her to the 7.7 team. Joanna truly believes that the foundation of our health and happiness comes from a proper diet.

Joanna loves coffee, yoga, and meal prepping. She is a proud owner of 3 pet chickens and her goal is to become a Registered Dietitian and to be able to save the world, one patient, at a time.

Novi, MI

7.7 nutrition has the most knowledgeable and genuine team of nutritionists. They are very thorough and take the time to get to know you personally and adjust to your needs. They don’t provide “cookie-cutter” diets, they are customized for you personally. I love the accountability their programs provide. Not only that I’ve had FANTASTIC results. I’m sleeping better at night and my energy has substantially increased which is where I was lacking the most. Highly recommended!!

Kristina Cardona


Stacey Books

Registered Dietitian Nutritionist 

Stacey graduated from Michigan State University in 2005 with a BS in Dietetics and graduated from the Henry Ford Hospital Dietetic Internship Program in 2006 in order to obtain her RDN license. She has completed a Certificate of Training in Adult Weight Management Level 1 and Level 2, through the Commission on Dietetic Registration. 

Stacey has practiced as a Registered Dietitian since 2007 in the areas of clinical nutrition, wellness, and management.  She has had several years of experience treating patients with multiple medical problems through medical nutrition therapy.  Her passion is to educate and provide clients with preventative medicine approaches to improve overall health.

From a young age, along with nutrition she has held a strong interest in fitness and in the past has taught group fitness and ran competitively.  Stacey is a mom of three active boys, she enjoys time with family and friends.  She also likes to bake, craft and travel during her free time.


Paige Helming

Nutrition Assistant

Paige is currently pursuing her undergraduate degree at Michigan State University for a Bachelor of Science Degree in Nutritional Sciences with a concentration in Global Nutrition and Health. She also has a minor in Environmental Studies and Sustainability. Upon finishing her degree, Paige is hoping to become a Registered Dietitian.

This is Paige’s first position in Nutrition and Dietetics, but she is learning fast along the way.

Paige is extremely passionate about working with people and helping others in any way, especially on their journey to a healthier life. She believes that we are all individuals in our own way and therefore reaching our health goals needs to be designed for your specific needs! 

Paige loves staying active especially outdoors and is passionate about physical health as much as I am mental health. Paige loves running, yoga and cooking, She is a big vegan foodie and a coffee-aholic.

She also loves traveling and hopes one day to incorporate that into her career and eventually address nutrition and health on a global scale. 


Diana Granados

Nutrition Coach

Coming Soon


Birmingham, MI

The personalized service Polina offers is unlike any other. Her customized nutrition programs are made to fit even the toughest schedules. She is extremely knowledgeable, patient and caring of all her clients. Great experience.”

Lynn Pham

77 Nutrition Diet Fitness

Julia Damman

Nutrition Coach

Julia has a Bachelor’s Degree in Dietetics from The University of Wisconsin—Madison and is preparing to become a Registered Dietician.

She has multiple years of experience in healthcare and nutrition. Her goal is to help empower individuals to make healthy lifestyle choices by providing them the right tools and guidance. She is excited to be back in Michigan to help the community she grew up in.

77 Nutrition Diet Fitness

Celine Rockafellow

Nutrition Assistant

Celine is currently finishing up her Bachelor’s degree in Health Sciences with a concentration in Integrative Holistic Medicine at Oakland University. 

She has personal experiences with weight loss and lifestyle changes and loves to pass her experience on to others.

She believes that the goal to a happy life is through a healthy lifestyle and diet. 

Her passions include family time with her husband and future baby, outdoor activities like swimming, disc golf, and tennis. 

Nutrition Done Right 

Call us today to schedule an appointment! Our educated, trained, & diverse staff is here to answer your questions!

77 Nutrition Diet Fitness

3251a W Hillsborough Ave

Tampa, FL 33614

Call or Text Us

(813) 895-6600

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Hours of Operation

M-F: 9am - 9pm

Sat-Sun: 9am - 3pm

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