Meghan Trainor recently turned heads with her remarkable weight loss transformation at the 2025 Billboard Women in Music event. While speculation swirled around the use of weight-loss drugs, the singer set the record straight, crediting her transformation to scientific advancements and a method known as biohacking.
The Science Behind Her Glow-Up
Trainer, who has long been an advocate for body positivity, found herself at the center of intense scrutiny when images of her slimmed-down figure began circulating online. Many assumed she had resorted to popular weight-loss drugs like Ozempic. However, in an interview with Entertainment Tonight, Trainor revealed that her transformation was fueled by scientific knowledge and innovative health techniques.
“Science is the secret,” she said. “I’ve learnt so many things that I never knew before.”
The singer admitted that for years she had been exercising incorrectly, focusing heavily on cardio, which left her body inflamed and exhausted. Realizing that her approach was counterproductive, she shifted her focus to more effective methods, including weightlifting and biohacking.
“I used to think that just running and doing endless cardio would help, but it actually made me feel worse,” she explained. “Now, I’m into biohacking—anything that can help me feel younger, stronger, and healthier.”
What is biohacking?
Biohacking is a growing trend that involves using science and technology to optimise physical and mental performance. Trainer has embraced this approach by incorporating advanced techniques to enhance her overall well-being. One of the key components of her routine includes nicotinamide adenine dinucleotide (NAD) therapy.
NAD is a coenzyme essential for energy metabolism, and its levels naturally decline with age. By replenishing NAD, individuals may experience increased energy, improved cognitive function, and even a slowing of the ageing process.
“I just learnt about NADs, and I’m all in. Make me Hailey Bieber—I’ll try it all,” Trainor joked. “I love having experts explain the science behind it to me.”

Meghan Trainer’s Biohacking Journey: The Science Behind
Debunking the Olympic Rumours
Despite her openness about her journey, social media remained sceptical. Some users were convinced that Trainor had used weight-loss injections like Ozempic or Mounjaro, both of which have gained popularity in recent years.
According to UC Davis Health, Ozempic is primarily prescribed for Type 2 diabetes but has become widely used for its weight-loss benefits due to its active ingredient, semaglutide. Similarly, Mounjaro, another diabetes medication, has shown significant weight-loss effects.
Trainor addressed the speculation head-on, emphasising that her weight loss was not solely due to medication but a combination of diet, exercise, and medical support.
“Yes, I used science and support (shoutout to Mounjaro!) after my second pregnancy, but I also worked with a dietitian, made major lifestyle changes, and started training with a professional,” she shared. “I did what was best for me, and I feel incredible.”
The Pressure of Fame and Body Image Expectations
Although Trainor has worked hard to achieve a healthier lifestyle, she expressed disappointment that much of the conversation about her transformation focused on her appearance rather than her career achievements.
“It’s frustrating that so many questions were about my body instead of my music or the decade of hard work I’ve put in,” she wrote on social media. “This is what it’s like to be a woman in the industry.”
She also acknowledged that her body has changed over time and that she has embraced the process. “No, I don’t look like I did 10 years ago, but I’m on a journey to be the healthiest, strongest version of myself—for my kids and for me.”
A Bold Look for a Bold Statement
At the Billboard Women in Music event, Trainor exuded confidence in a stunning black ensemble. Her dress featured an illusion neckline and a sheer lace skirt attached to a monokini-style bodice. She completed her look with sleek high-heeled boots, statement jewellery, and a polished ponytail.
The singer’s transformation is not just about aesthetics but a testament to her commitment to a healthier lifestyle. By embracing biohacking and scientific advancements, she has redefined what it means to take control of one’s health in the modern age.
A Message of Empowerment
Trainer’s journey serves as an inspiration for those looking to achieve their own health goals. Rather than focusing on unrealistic beauty standards, she encourages people to prioritize their well-being and make informed choices.
“I’m so glad I made these changes,” she said. “I feel stronger, healthier, and happier than ever.”
As she continues to thrive in her career and personal life, Meghan Trainor’s transformation stands as a reminder that health and happiness should always be the priority, no matter what the headlines say.