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Meghan Trainor’s Weight-Loss Journey: Everything She’s Said About Diet, Exercise and Mounjaro

Meghan Trainor has described a post-pregnancy health journey involving gestational diabetes, a dietitian, trainer, strength training and Mounjaro. Here is what she has confirmed—and what remains unverified.
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Meghan Trainor has described her weight-loss journey as a combination of pregnancy-related health changes, nutrition and lifestyle work, professional guidance, strength training, increased activity and Mounjaro—not a one-product transformation. Her clearest numerical account is a change from 190 pounds to 155 pounds after her second child, or 35 pounds in that phase. The frequently repeated 60-pound figure comes from entertainment coverage and is not independently reconciled with her statement.

The short answer

Meghan Trainor has described her weight change as the result of several factors, not a one-product transformation. In her public accounts, she has mentioned pregnancy-related health problems, major nutrition and lifestyle changes, work with a dietitian and trainer, regular strength training, walking and step tracking, touring, and the use of Mounjaro after the birth of her second child.

Her clearest numerical statement came in an April 15, 2026 Us Weekly interview. Trainor said that after her second baby she went from 190 pounds to 155 pounds while working with a dietitian and trainer—a 35-pound reduction during that phase—and then became stuck at 155. Some entertainment outlets have repeated a figure of 60 pounds, but that number is not reconciled with her more specific account and should not be treated as a verified lifetime total.

Question What Trainor has publicly said
What prompted the changes? Pregnancy, gestational diabetes, motherhood and a desire to feel healthier, stronger and more energetic.
What support did she use? A dietitian, a trainer, strength training and what she called “science and support,” including Mounjaro.
How much weight did she specifically report losing? 35 pounds in the phase she described as going from 190 to 155 pounds after her second baby.
Did she say Mounjaro was the only reason? No. She described it as one part of a broader health and fitness effort.

Pregnancy and gestational diabetes were the starting point

Trainor first publicly disclosed gestational diabetes during her first pregnancy in December 2020. She described the condition as manageable but said it required close attention to what she ate. She also framed the experience as an opportunity to learn more about nutrition and her health.

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In her later account, Trainor said she had gestational diabetes throughout that pregnancy and had to send blood-sugar results to her doctor every day. She also said that one of her early attempts to control the condition—trying to eliminate carbohydrates too aggressively—actually made her blood sugar worse.

That detail matters because it undercuts the idea that her story is a simple low-carbohydrate diet success story. Trainor’s experience was personal and medically supervised; it is not evidence that people with gestational diabetes should remove carbohydrates or copy a celebrity’s eating pattern. Gestational diabetes also should not be casually conflated with type 2 diabetes, and Trainor’s public comments do not establish her current diagnosis.

Motherhood and the postpartum timeline

Trainor’s first son, Riley, was born in February 2021. Her second son, Barry, was born in July 2023. The most visible recent phase of her weight change followed Barry’s birth, but her own descriptions suggest that the process developed over years rather than through a single short-term program.

In the April 2026 interview, she said pregnancy and motherhood prompted her to take her health more seriously. She acknowledged that she had previously neglected exercise and nutrition and said it took time to learn how to care for herself. Her stated goals were feeling healthy, strong and confident for herself and her children—not simply reaching a number on a scale.

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That context is important when interpreting celebrity before-and-after coverage. A postpartum body does not follow a fixed timetable, and Trainor’s experience included professional support, prescription medication, a particular medical history and the resources required to maintain a demanding fitness routine while working.

Strength training became a central part of her routine

In a December 2024 interview with Women’s Health, Trainor said she and her husband, Daryl Sabara, trained together about three times a week. She described lifting weights as a major part of becoming stronger, improving her energy and making touring more manageable physically.

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When a formal workout was not possible, she said she walked and used Apple Watch step tracking. She also credited touring itself with contributing to additional weight loss because of the physical demands of performing and traveling. At the same time, she said she wanted to rebuild some of the glute muscle she felt she had lost.

Her explanation presents exercise as a tool for performance, strength and mental well-being as much as appearance. It does not establish a specific workout plan, number of sets, lifting weights or calorie target. The publicly reported “three times per week” figure describes her routine at that time, not a prescription for everyone.

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What she said about Mounjaro

After attention focused on her appearance at the March 29, 2025 Billboard Women in Music event, Trainor addressed the subject in an Instagram statement reported by entertainment outlets on March 31 and April 1. She said she had worked with a dietitian, made major lifestyle changes, begun exercising with a trainer and used “science and support.” She specifically named Mounjaro and said it had helped after her second pregnancy.

Her wording is significant: she did not present Mounjaro as the sole explanation. Her public account combines the medication with nutrition changes, exercise and professional guidance. A photo or red-carpet appearance cannot establish which factor contributed how much, and it cannot establish whether the medication is responsible for a particular amount of weight loss.

What Mounjaro is—and what is not known about Trainor’s use

Mounjaro is the brand name for tirzepatide. FDA labeling available in 2026 identifies Mounjaro as a medicine for improving blood-sugar control in adults with type 2 diabetes, used alongside diet and exercise. Tirzepatide is also marketed as Zepbound under separate labeling for chronic weight management.

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Trainor’s comments do not establish why it was prescribed to her, whether she had type 2 diabetes, what dose she used, how long she took it, who prescribed it or whether she was still taking it as of August 12, 2026. Those details should not be inferred from her appearance or from the fact that she previously had gestational diabetes.

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The medication also has meaningful safety considerations. FDA labeling includes a boxed warning about thyroid C-cell tumors observed in rats and contraindications involving a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2. Anyone considering tirzepatide needs individualized advice from a licensed clinician; Trainor’s experience is not dosing or treatment guidance.

The 60-pound figure versus her 190-to-155 account

In November 2025 interviews, Trainor discussed hostile online reactions to her appearance and connected the scrutiny with her song Still Don’t Care. Us Weekly and other outlets described the criticism in connection with a reported 60-pound loss.

That number should be handled cautiously. In the more detailed April 2026 interview, Trainor herself described going from 190 pounds to 155 pounds after her second baby. The difference between those figures could reflect different starting points, time periods, rounding or media reporting, but the available public accounts do not resolve the discrepancy.

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The most accurate wording is therefore: some outlets reported that Trainor had lost 60 pounds, while Trainor later described a 35-pound reduction—from 190 to 155 pounds—in the post-second-pregnancy phase she discussed. It would be inaccurate to present 60 pounds as an independently verified total or to claim a precise lifetime loss that she has not clearly confirmed.

Her breast surgery was separate from the weight-loss process

Trainor disclosed a breast augmentation and lift in March 2025. She said that after having children, adopting a healthier lifestyle and losing weight, she felt happy with the cosmetic decision because she had long been insecure about her breasts.

The surgery belongs in the appearance timeline, but it was not a weight-loss intervention. Her own description places it after the weight loss and presents it as a cosmetic and body-image decision. Breast augmentation and lift should not be described as part of a method for losing weight.

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Secondary coverage of a later PEOPLE interview also reported that Trainor had not always felt comfortable in her body and had worked with a therapist to change her relationship with her body and self-image. That adds another dimension to the story: the outcome she describes involves confidence and mental health, not only a scale reading.

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How she responded to criticism

Trainor has said that the public reaction to her changed appearance was painful and disheartening. Her response has consistently been that she feels healthier, stronger and more confident, while objecting to the intense focus on her body.

Her comments also show why a celebrity weight-loss story can be misleading when reduced to a number. The visible change became news, but Trainor has described the underlying process as learning about nutrition after gestational diabetes, getting professional help, lifting weights, staying active during touring, using a prescription medicine and working on her self-image.

What can—and cannot—be concluded from her story

  • She has confirmed a multi-factor approach. Her public statements name a dietitian, trainer, lifestyle and dietary changes, strength training, walking, touring and Mounjaro.
  • She has not confirmed a single “secret diet.” In fact, she said that aggressively cutting carbohydrates during gestational diabetes worsened her blood sugar.
  • She has not established a precise total loss. The 190-to-155 account is the clearest specific figure found, while 60 pounds remains a reported media figure that is not reconciled with it.
  • She has not provided a medication protocol. Her dose, duration, prescribing rationale and current use are not established in the public accounts summarized here.
  • Her routine is not a universal postpartum template. Postpartum recovery, diabetes history, medications and exercise capacity vary widely.
  • The cosmetic surgery did not cause the weight loss. Trainor described the breast augmentation and lift as a separate decision made after childbirth and weight loss.

Bottom line

Meghan Trainor’s own explanation is a long-term, cumulative health story rather than a Mounjaro-only transformation. Pregnancy-related health concerns pushed her to learn more about nutrition; later, she added professional guidance, strength training and more daily activity, and she acknowledged Mounjaro as additional support after her second child. The clearest number she has supplied is 190 to 155 pounds, or 35 pounds in that described phase—not a definitively verified 60-pound lifetime loss.

Her account can explain what she has said, but it cannot tell another person what to eat, how to exercise or whether tirzepatide is appropriate. Those decisions require medical and, where appropriate, postpartum-specific professional care.

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Source note: This account is based on Trainor’s reported interviews and public statements, including coverage by Us Weekly, Women’s Health, PEOPLE and reports of her March 2025 Instagram statement. Where media reports conflict with her more specific statement, the distinction is identified rather than smoothed over.

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Frequently Asked Questions

How much weight did Meghan Trainor say she lost?

The clearest figure Trainor herself provided is a change from 190 pounds to 155 pounds after her second baby, which equals 35 pounds during that phase. Some entertainment outlets reported a 60-pound loss, but that figure has not been reconciled with her more specific account and should not be presented as a confirmed lifetime total.

Did Meghan Trainor say she used Mounjaro for weight loss?

Yes. In a March-April 2025 public statement, Trainor said she used Mounjaro after her second pregnancy. She described it as part of a broader approach that also included a dietitian, trainer, lifestyle changes and exercise, rather than as the sole cause of her weight change.

What is Meghan Trainor’s Mounjaro dose and medical reason for taking it?

Trainor has not publicly established her dose, treatment duration, prescribing rationale, current medication status or whether she had type 2 diabetes. Those details should not be inferred from her previous gestational diabetes diagnosis or from her appearance.

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Was Meghan Trainor’s breast surgery part of her weight-loss treatment?

No. Trainor described the breast augmentation and lift as a cosmetic decision made after childbirth and weight loss. It was not a weight-loss treatment.

The Bottom Line

Trainor has described her weight change as the result of nutrition and lifestyle changes, professional support, strength training, increased activity and Mounjaro—not Mounjaro alone. Her clearest specific figure is a change from 190 to 155 pounds after her second child; the often-repeated 60-pound figure remains unverified and unreconciled.

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