Meghan Trainor, the powerhouse vocalist behind the body-positive anthem “All About That Bass,” has been candid with her fans about her evolving health journey. Over the past few years, the singer has visibly transformed, sparking conversations and curiosity about the methods and motivations behind her weight loss. Trainor has consistently emphasized that her focus is on becoming the “healthiest, strongest version” of herself, particularly for her two young sons, Riley and Barry, and for her own well-being.
Trainor’s journey hasn’t been a quick fix but rather a series of conscious lifestyle adjustments. After welcoming her first son in 2021, she revealed she was at her heaviest and not feeling her best. This became a significant catalyst for change. Initially, she embarked on a path of consistent exercise and healthier eating habits. In a 2022 interview with Entertainment Tonight Canada, Trainor shared that she had lost 60 pounds through dedication to daily workouts and learning about portion control and enjoying nutritious foods. “I learned that I do like healthy food, and I learned what portions mean,” she explained, highlighting a fundamental shift in her relationship with food.
Strength training has become a cornerstone of Trainor’s fitness routine. She revealed on “Today” in December 2024 that lifting weights three times a week has been transformative, not only aiding in weight loss but also boosting her energy levels. “I didn’t know lifting weights would change my life so much,” she said, contrasting it with her previous experiences with cardio that made her feel “swollen.” This focus on building muscle has become integral to her overall fitness goals, with Trainor even mentioning her aim to “grow my butt back” after significant weight loss in an interview with Women’s Health in January 2025.
Nutrition also plays a vital role in Trainor’s health journey. She told Women’s Health that she strives to consume around 100 grams of protein daily, typically starting her day with eggs and turkey bacon. For lunch and dinner, she often relies on meal delivery services that prioritize protein and balanced nutrition, acknowledging her own limitations in the kitchen. Her husband, actor Daryl Sabara, has been a supportive partner throughout this process, actively participating in workouts and helping to find suitable healthy meal options.
More recently, Trainor has openly discussed incorporating the weight-loss drug Mounjaro into her regimen after the birth of her second son in 2023. On her podcast, “Workin’ On It,” which she co-hosts with Sabara, the couple shared their experience with the medication. Trainor clarified in an Instagram post in May 2025 that alongside “huge lifestyle changes” and working with a dietitian and trainer, she used “science and support (shoutout to Mounjaro!)” to aid her post-pregnancy journey. She emphasized that this decision was made to become the “healthiest, strongest version” of herself for her children and for her own well-being, stating she has “no shame” in utilizing this support.
Trainor’s transparency about her methods, including the use of Mounjaro, has sparked varied reactions. While some fans have expressed support for her prioritizing her health, others have voiced concerns, particularly in light of her earlier body-positive messaging in “All About That Bass.” This was further amplified when she altered a lyric of the song during a recent performance, referencing her physical transformation and breast augmentation.
Despite some criticism, Trainor has maintained that her journey is deeply personal and driven by a desire for improved health and self-esteem. She has spoken about working with a therapist to cultivate greater self-love and body acceptance, emphasizing that it is an ongoing process. In March 2025, she told People, “I have never been more comfortable in my body.”
Meghan Trainor’s weight loss journey is a multifaceted narrative encompassing diet, exercise, and, more recently, medical intervention. Her openness about these aspects provides a glimpse into the complexities of navigating health and body image in the public eye, highlighting her commitment to long-term well-being for herself and her family.