Weightless: A Doctor’s Guide to Weight-Loss Medications, Sustainable Results and the Health You Deserve

by Dr Salas-Whalen

'This book is a game-changer. It says what too many people need to hear but rarely Struggling with your weight is not a personal failure... If you’ve ever felt isolated in this fight, you need to read this book. You are not alone any more.' – MEL ROBBINS, bestselling author of THE LET THEM THEORY

Your playbook for optimising results on GLP-1s, to reverse obesity and take charge of your health – including guidance on how to sustain weight loss once you come off the medication.

*With a foreword from New York Times bestselling author of THE NEW MENOPAUSE, Dr Mary Claire Haver*

GLP-1 medications have revolutionised how doctors treat obesity and changed the lives of the people who take them. With demand for these transformative drugs skyrocketing, people interested in trying GLP-1 therapy for weight loss are navigating uncharted landscape, and many patients walk out their doctor’s clinic with a prescription but not the essential guidance they need to get the best results – or sustain them.

In Weightless, Dr. Rocio Salas-Whalen, an obesity medicine specialist, covers this crucial information and the tried-and-true strategies that have helped her patients achieve their health goals. She helps you understand that taking your medication is only one step of the journey. In fact, these drugs work best when you pair them with proper monitoring and lifestyle changes. Drawing from her clinical experience and stories from her patients, she explains how


Ask the right questions at your first appointment and select the best GLP-1 medication for youUnderstand how it will change your experience with food and hungerAdopt the two other key 'prescriptions' – eating more protein and strength-training – to get the most from your treatment and prevent muscle lossNavigate the impacts of GLP-1 therapy on your relationships with others, and yourselfHow to sustain your weight loss when you come off GLP-1sComprehensive and research-backed, Weightless will give you the science, clarity, and confidence to take the first step toward a healthier, more empowered you.

268 pages, Kindle Edition

Published January 1, 2026

Reviews

[Lisa M Jarvis · Rating 5 out of 5]

If you've ever struggled with weight, considered a GLP-1 or are taking a GLP-1, this book is for you. It explains how we gain weight and all the factors involved and how the old weight loss mantra of calories in calories out is no longer valid. She explains the history of GLP-1s, the different types, and everything you want to know about them from symptoms to expect to how to prevent those symptoms. She has one of the most sincere and genuine hearts of any doctor I've encountered. This book is a road map from how to start the Weight-loss journey to what to do when you reach your goal. It's a must read.

[Kristen Cantrill · Rating 4 out of 5]

Thorough introduction to glp1s. I’ve read a few other books about this subject so I felt I didn’t learn anything new but excellent hook and fabulous doctor.