Can hypothyroidism cause weight gain? In this episode of The Dr. Brighten Show, Dr. Jolene Brighten and Dr. Emily Kiberd explore why weight changes with Hashimoto’s may involve more than “eat less, move more” and how thyroid testing, nutrition, sleep, and strength training fit into the conversation.
Dr. Kiberd, a chiropractor and founder of Thyroid Strong, shares her experience with Hashimoto’s and her work with women focused on rebuilding energy and strength. Dr. Brighten also draws on her own experience with Hashimoto’s as they discuss the questions women can bring to their providers and the habits they say are worth examining.
Can hypothyroidism cause weight gain? What you’ll learn about thyroid and weight gain
- Why unexplained weight gain may deserve a closer look: Dr. Brighten calls gaining more than 10 pounds in a year without explanation a red flag.
- What can be missed when someone reports gaining 20 pounds in six weeks and is told to exercise more or restrict calories.
- Which thyroid tests Dr. Kiberd says she wants to see beyond TSH—and why the conversation includes free T3, free T4, reverse T3, and antibodies.
- How Dr. Kiberd explains reverse T3 with a “brakes” metaphor, and what overtraining, undereating, or infections may have to do with it.
- Why the guests question whether calorie restriction is always the right next move when hypothyroidism has not been addressed.
- What Dr. Kiberd means by the “four corners” of a foundation: food, movement, sleep, and the nervous system.
- Why the discussion of fatigue and weight includes sleep quality—and a guest’s estimate of 90 minutes to two hours of deep sleep.
- How the guests distinguish abdominal weight from bloating that appears after eating, early fullness, or other digestive symptoms.
- Why the suggested approach to movement is low and slow, including a gradual step increase instead of jumping straight to a high daily goal.
- What the “essential seven” strength movements are, and why the conversation emphasizes function and recovery.
- Why the guests say women may be undereating protein and carbohydrates, and how that can affect their ability to fuel training.
- What Dr. Kiberd describes as her workout-fueling targets: 15 grams of protein and 15 grams of carbohydrate before exercise, followed by a meal with at least 30 grams of protein.
- What the conversation covers about protein smoothies, whey isolate, hydrolyzed beef protein, and drinking a shake too quickly.
- Why the guests discuss Ozempic and tirzepatide alongside appetite, protein intake, and preserving muscle.
- Why Dr. Brighten says body composition and waist-to-hip measurements may tell a different story than the number on the scale.
- How berries, chickpeas, vegetables, chia, flax, and psyllium come up in a conversation about fiber—and why the guests recommend increasing it gradually.
- Why recurring digestive symptoms may prompt a closer look at SIBO, motility, and thyroid function; Dr. Brighten cites a 55% SIBO recurrence rate during the discussion.
- What Dr. Kiberd names as three starting points: consider going gluten-free, aim for 30 grams of protein at breakfast, and get a full thyroid panel if you have not had one.
Does hypothyroidism cause weight gain? The factors this episode explores
The episode begins with a question many women have asked after a sudden change in their body: can hypothyroidism cause weight gain even when eating and exercise habits have not changed? Dr. Kiberd describes clients who report rapid weight gain and her own experience of gaining weight after postpartum thyroiditis. Dr. Brighten shares a similar experience and pushes back on advice that treats every weight change as a simple matter of eating less and moving more.
The conversation does not reduce weight to one cause. The guests discuss thyroid function alongside stress, sleep disruption, nutrition, movement, and digestive symptoms. Dr. Kiberd describes “inflammatory weight” as one idea she considers when someone feels they are doing everything they can and the scale is not changing. The episode also explores how abdominal weight and bloating can overlap, and why symptoms such as getting full quickly or feeling bloated after eating are part of the broader conversation.
Thyroid labs and the weight-gain question
Dr. Kiberd shares that she likes to see TSH between 1 and 2, and recalls being diagnosed when her TSH was 3.2. She says other markers were not checked at the time. She and Dr. Brighten then walk through the panel they discuss in the episode: TSH, free T3, free T4, reverse T3, TPO antibodies, and thyroglobulin antibodies.
They describe free T3 as the “gas” and reverse T3 as the “brakes.” Dr. Kiberd says she has seen reverse T3 rise in people who are overtraining and undereating, and mentions infections as another possible factor in the cases she sees. She also estimates that about 20% of people whose Hashimoto’s is caught early may go into remission; she presents this as her estimate in the conversation and shares that she experienced remission herself.
Why “eat less, move more” is debated
A major thread in the episode is whether cutting calories and adding more exercise is helpful for everyone with hypothyroidism. Dr. Kiberd says that, in her experience, many women with Hashimoto’s are already undereating, particularly protein. She describes under-fueling as a potential obstacle to energy and to the movement or strength training someone hopes to do.
The guests also talk about stressors that can accompany postpartum life, including sleep disruption, and discuss cortisol, gut infections such as H. pylori and SIBO, and mold exposure as topics they consider in their clinical experience. These are presented as parts of the conversation, not as a single explanation for every person’s weight changes.
Movement, strength, and recovery
For someone who is deconditioned or struggling with soreness and fatigue, Dr. Kiberd recommends building gradually. She gives the example of increasing a baseline of 2,000 steps by 1,000 steps per day the following week, rather than immediately aiming for 8,000 to 10,000. She also suggests walking after meals and describes strength training twice a week as a possible starting structure.
The “essential seven” movement patterns she names include a hinge, squat, lunge, push, pull, carry, and anti-rotation exercise. She emphasizes form, programming, and recovery, and says that people who are not sleeping well may have a harder time recovering from workouts.
The guests also discuss how the goal of exercise can extend beyond weight loss. They talk about building muscle, functional strength, balance, and choosing mobility work that fits the person—especially when hypermobility or Ehlers-Danlos syndrome is part of the picture.
Protein, carbohydrates, fiber, and practical steps
Nutrition is another major focus. Dr. Kiberd identifies under-eating protein and carbohydrates as common issues she sees. She discusses protein digestion in connection with H. pylori, and explains why she wants women to consider both protein and carbohydrates when thinking about muscle recovery and training.
The episode includes examples of fueling before and after exercise, as well as a discussion of protein smoothies and powders. The guests acknowledge that protein targets vary with activity and goals. Dr. Kiberd shares that she has been aiming for about 165 grams of protein while working toward her own muscle-building goals; the conversation makes clear that this is her personal approach, not a universal target.
Fiber comes up in the context of berries, chickpeas, vegetables, chia, flax, and psyllium. The guests caution against suddenly increasing fiber if it causes uncomfortable bloating, and discuss the importance of looking into possible gut issues. They also describe tracking food as a way to understand intake, while noting that measuring every meal is not something everyone wants to do long term.
Frequently asked questions
The episode explores how hypothyroidism and Hashimoto’s may be part of the picture when someone experiences weight changes. The guests also discuss other factors they consider, including food intake, movement, sleep, stress, and digestive symptoms.
The panel named in the episode includes TSH, free T3, free T4, reverse T3, TPO antibodies, and thyroglobulin antibodies.
Dr. Kiberd cautions that calorie restriction may be counterproductive for some women with unmanaged hypothyroidism, particularly when they are already under-eating. The guests frame nutrition and weight as more complex than a single rule.
She recommends a gradual approach, such as increasing steps in small increments and adding strength work at a manageable pace. She also emphasizes form, programming, and recovery.
She suggests considering a gluten-free diet, aiming for 30 grams of protein at breakfast, and getting a full thyroid panel if one has not been done. These are points from the episode’s conversation, not individualized medical advice.
The guests discuss protein targets in relation to a person’s goals and activity, and share food examples for adding protein and fiber. They also recommend increasing fiber gradually and investigating persistent bloating rather than pushing through discomfort.
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