Unlocking Wellness with Thrive by K
By Kristin Gustin
Welcome toThrive by K!
I am thrilled to introduce myself as your dedicated wellness healthcare provider, here to share insights, tips, and stories that promote a healthier and happier life. My name is Kristin Gustin, and I have spent the past 15 years diving deep into the world of health and wellness.
At Thrive by K, we address the root causes of health issues and optimize overall wellness. By focusing on personalized care, these services integrate advanced diagnostic testing and natural, evidence-based treatments to support everyone’s unique health journey. Thrive by K empowers clients to take control of their health and thrive at every stage of life.
What Is Thrive By K?
Thrive by K is your local functional healthcare provider. We have built a warm and caring environment where we truly value our patients. We are here to support you on your journey toward achieving optimal health and wellness, every step of the way. Through our preventive care and wellness expertise, we aim to inspire and guide our patients toward sustainable lifestyle changes and holistic well-being. We blend compassionate care with cutting-edge medical treatments to help everyone we serve meet and exceed their health and wellness goals. We are committed to continuous learning, innovation, and exceptional, personalized care that respects and honors every client’s unique needs and choices.
A Bit About Me
As an Advanced Registered Nurse Practitioner, I am passionate about adult preventative care and wellness. As your medical healthcare provider, I will care for you like family, respect you and your decisions, and exceed your expectations with excellent, compassionate care. I received my master’s degree in science of nursing at the University of South Florida and have over 10 years of experience in various specialties, including cardiology, pulmonology, and urology. On the personal side, when I’m not working, I enjoy motherhood, volunteering, boating, sports, and fitness.
A Bit About Sammy
Samantha “ Sammy” Holt’s lifelong fascination with science and the human body led her to join Kristin on a dedicated health and wellness journey. She holds a Bachelor of Science in Biology from UMass Boston. Samantha’s professional journey is marked by nearly two years of collaboration with Kristin, whose expertise she trusts implicitly. Her personal health journey includes overcoming struggles with weight. With the help of Tirzepatide and Kristin’s guidance, she achieved and maintained remarkable weight loss. She has maintained her weight for more than a year and feels and looks better than ever. Samantha is enthusiastic about sharing her journey and helping others achieve happier, healthier lives.
Services We Offer
Thrive by K focuses on functional health through a comprehensive approach that includes weight management, cutting-edge peptide therapies, hormone replacement, sexual enhancement, anti-aging treatments, intravenous (IV) infusions, and aesthetic services. Our goal is preventative care, treating health concerns, and fostering overall well-being.
We understand that convenience is essential, so we provide flexible options for our clients, including in-office appointments, telehealth consultations, and personalized home visits. Our commitment to patient care extends beyond regular hours; we are known for our willingness to support our patients in need, even during late hours and on weekends, ensuring everyone has access to the care they deserve.
Join Me On This Journey
I believe that wellness is a journey, not a destination, and I am excited to explore topics related to health and well-being with you. You will find valuable insights, practical tips, inspiring stories, and resources to support your wellness goals here.
As I share my knowledge and experiences, I hope to educate and inspire you to take charge of your health. Together, we will build a community where everyone feels supported and empowered to thrive.
Thank you for taking the time to get to know me and learn about Thrive by K, where being healthy is being happy. I can’t wait to see how far we can go together on this incredible journey toward holistic wellness.
Stay tuned for our upcoming posts and remember: your health is a lifelong adventure – let’s thrive together!

Lee County Commissioner Kevin Ruane, Kristen Gustin, and Doreen Ruane at Thrive by K’s recent grand opening.

It has been such a pleasure working with Kristin. She listens to everything and answers all your questions. She does not make you feel rushed, and she takes her time. She’s very easy to get a hold of and gets back to you in a very timely manner. I’m excited to see what will be down the road as I continue to work with her through this journey.
As a fellow nurse practitioner, I hold Kristen in the highest regard for her exemplary care and expertise. She has played a pivotal role in my daughter and I’s weight loss journey with her personalized, knowledgeable approach. Kristen listens attentively, understands our unique needs, and provides comprehensive, evidence-based guidance. Her impeccable communication skills ensure we are well-informed and comfortable with our health decisions. Kristen’s dedication and genuine concern for her patients make her an outstanding healthcare provider. I highly recommend her to anyone seeking a compassionate and skilled nurse practitioner.
I am so excited about my new journey with Thrive by K. I have struggled with weight gain and improving my health through menopause. Since I had breast cancer, hormone therapy is not an option for me. I have tried other weight loss programs in the past, but I chose Kristin after discussing my current weight and health concerns with her. Her vast knowledge in the field, as well as her focus on a realistic approach to weight loss and wellness was extremely motivating. Kristin and her team provide support in person through messages, videos, and one-on-one conversations, which is convenient and reassuring. I finally feel like I’m on the right track.
If you’re looking for a health care professional that is honest, intelligent, has great bedside manner, is courteous, truly listens to patient’s concerns, and is an overall great person, then you have found the perfect healthcare professional in Kristin Gustin. I have been a patient of hers for a few years and she has helped me tremendously.
I just want to express my sincere Thank You for your recommendation of the weight loss shot for my husband and myself. We are on this journey together and are so grateful to you for all your support and guidance. I’ve lost 12 lbs after 4 weeks. I know I have a long way to go, but with your support, I know I will not only be at my goal weight, but off my meds too. The fact that my husband listened to you and now realizes that by taking the shot & losing the extra weight will also help him with his overall pain he has been living with for years. Plus not having to take pain meds daily is a big goal for him. I will update you on our progress and can’t wait to have before and after pictures of us both.
I was taking semiglutide and I lost weight but it was very slow. I was at a plateau and I was desperate. I started working with Kristin at Thrive by K and she helped me get on the right dose of skinny shots and the right diet. The weight started coming off immediately! My energy went through the roof! I had chronic hip and knee pain and could barely walk my dog. I thought I might need hip surgery, but the pain is gone and I’ve lost 70 pounds! I lost another 2 pounds last week! I still want to lose 30 more – I never thought it was possible at my age. My starting weight was 234 and now I’m at 165. I’m 5’4 and 61 years old and it’s like a real miracle. I truly believe I can reach my goal of 135 with Kristin at Thrive by K!
I have the pleasure of working with Kristin on my weight loss. After coming off a serious injury I had to take a hiatus from any type of physical activity. Once I healed, I realized I could no longer lose weight (especially my love handles) and build lean muscle the way I used to. It was actually quite maddening. Until I spoke with Kristin. Not only did she give me her recommendations on what would work. She also helped me step by step to answer any questions, give advice, and lend support. After a short time working with her I saw drastic results. I’m not on my fourth month working with Kristin, and I’ve lost nearly 30 pounds, my confidence is up, and I feel once again the sky’s the limit. I’m 45 and feel better than I did in my 30s. I not only recommend Kristin, but I also trust her. I have recommended her to several friends already. Good luck with your goals!
I was so pleased with the service I received from Kristin. She went above and beyond to help me find the perfect item. I was very impressed with the quality of the product I received.
Kristin has been such a godsend! Throughout my weight loss journey, I’ve faced ups and downs, losing and gaining weight as I searched for balance. With Kristen’s unwavering support and guidance, I’ve achieved a total weight loss of 100 lbs, and I feel fantastic. Cheers to Kristen for being my rock and constant encouragement. Thank you for everything!
Kristin Gustin, NP, is by far the best primary care physician I have ever had. She is incredibly thorough and never dismisses her patients while being both up to date on the most recent science and leaving no stone unturned in her investigation. All of my neighbors on Pine Island discuss her and her wonderful care. She has an innate compassion for humans and truly exemplifies a medical professional in the industry for all of the right reasons. I suffer from POTS in addition to other ailments and could not have made it through to stabilization without her by my side fighting for me, listening to me, and caring for me as she does all of her patients without a second thought.
I’m ecstatic to share my incredible weight loss journey using the Skinny Shot and Sermorelin with Kristin at Thrive by K. Since starting in December 2023, I’ve lost an amazing 41 lbs and gone from a size 16 to a size 6. Kristin’s expertise and guidance, combined with the powerful ingredients of the skinny shot, have made all the difference. This formula has not only curbed my appetite but also boosted my energy and metabolism. I’ve noticed a significant reduction in cravings and an increase in motivation, making it easy to stick to my weight loss goals!
I am a mid-50s female and have been using the peptide therapy treatment from Thrive By K for the past two months, and the results have been nothing short of remarkable. As someone who has always been conscious about maintaining optimal health, I was seeking a natural and effective way to boost my overall wellness. These peptides have provided exactly that. One of the most significant benefits I’ve experienced is a dramatic improvement in my sleep quality. I now wake up feeling rested and rejuvenated, which has positively impacted my energy levels and overall vitality throughout the day.