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…


Body Building

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

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 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.

77 Nutrition Diet Fitness Brooke Shobh

Brooke Castelamare-Sobh

M.S., R.D.

Brooke is a Registered/ Licensed Dietitian and a Certified Lactation Specialist.

She holds a Bachelor’s Degree in Dietetics from Florida State University and a Masters of Science in Dietetics from the University of North Florida.

She is passionate about running, volleyball, and helping her clients achieve their health and wellness goals.

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

Laura Boring

Certified Nutritionist

A Texan at heart, Laura has been involved in the health and fitness industry for over 10 years. Laura is a licensed practitioner nurse (LPN) who decided to make health and nutrition her main focus. She has obtained multiple certifications through NASM in sports medicine and nutrition. Also, she has recently acquired a certification in health and nutrition coaching with HCI. She is an NPC and UFE bikini fitness competitor, as well as a former competitive kickboxer.

Her passion for overall health and helping others fulfill their goals has motivated her to start a boxing group for seniors who have been diagnosed with Parkinson’s disease. She believes that all nutritional, fitness and health goals are achievable with proper education and professional guidance. Laura strives to be there for her clients every step of the way making sure the experience is unique and successful to their specific nutritional needs. She is a mother of three girls, two cats, one dog and a very charismatic hedgehog Hugo Boss. She hopes to one day own a rehab center for animals. And she loves tacos!

77 Nutrition Diet Fitness

Carly Schram

Certified Nutritionist, B.S., NFS

Carly earned her bachelor’s degree from Wayne State University in Nutrition and Food Science. She has spent the last several years practicing holistic nutrition; specializing in all stages of cancer, hormone imbalance, and autoimmune diseases.

She has extensive experience in integrative medicine working to heal gut imbalances including increased intestinal permeability (leaky gut) and candida.

Her passion lies in helping people reach their health and wellness goals through customized nutrition plans. Carly loves competing on her Peloton, playing beach volleyball, and decompressing with yoga.

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

77 Nutrition Diet Fitness

Shalynne Barr

M.B.A., C.N.C., C.P.T., C.G.F.I.

Shalynne is driven by helping others live life with energy and vitality. She is a Certified Nutritional Consultant, a Certified Personal Trainer, and a Certified Group Fitness Instructor. Shalynne obtained her BS in Telecommunications with a Minor in Public Relations and Advertising and she also carries an MBA in Entrepreneurship.

Coupled with her education and her personal journey to achieving good health, Shalynne has a vested interest in seeing clients reach their goals and seeing an accomplished smile on their faces. Currently, Shalynne is studying to obtain her Behavior Change Specialist Certification and mastering the Spanish language. Shalynne is an avid reader, loves to cook healthy meals, is wilding excited about exercising, and has over 6 tubs of yarn to support her knitting hobby.

Stacey Books

Registered Dietitian Nutritionist 

Stacey graduated from Michigan State University in 2005 with a BS in Dietetics and completed an internship at Henry Ford Hospital in 2006 in order to obtain her RDN license.

She has practiced as a Registered Dietitian since 2007 in the areas of clinical nutrition, wellness, and foodservice management.

Stacey completed a Certificate of Training in Adult Weight Management Level 1 and Level 2, through the Commission on Dietetic Registration.  She has loved fitness from a young age and has worked as a fitness instructor and is a competitive runner.

She also owns a baking business on the side, called Creative Confections by Stacey, which combines her love of cooking and artistic talent.

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

Read Our Disclaimer 

Hours of Operation

M-F: 9am - 9pm

Sat-Sun: 9am - 3pm

©2021 7.7 Nutrition. All rights reserved.