Hormonal Weight Gain: How Hormones and Metabolism Interact

Written by: Angela Myers
Medically reviewed by: Ecler Ercole Jaqua, MD, MBA, DABOM

There’s nothing more frustrating than doing everything right, only to fall short. If you’re dealing with hormonal weight gain, that’s often how it feels—juggling restrictive diets and intense workouts that seem to work wonders for everyone else while the scale won’t budge for you. Here’s how to build a weight management plan that actually works when hormones are the problem.

You recently decided to eat healthier and workout five times a week. Even though you followed your plan to a T, the pounds just won’t drop. Or maybe you’ve eaten well and exercised consistently for years, yet you gained weight over the past few months, despite changing nothing about your lifestyle.

Both of these scenarios are incredibly frustrating and unfortunately common for people who menstruate. While no two weight management journeys are alike, hormones can play a bigger role in scenarios like the two above than you might expect. Continue reading to learn more about different hormonal shifts that can influence metabolism, what a treatment plan for hormonal weight gain may look like, and signs it’s time to see a healthcare provider about your hormonal health. 

Hormonal weight gain: what it is and what it can signal

Hormonal weight gain is when your body stores extra pounds due to imbalances in key hormones. These hormones help the body figure out when to store fat, impact metabolic speed, and influence appetite and food cravings. 

This type of weight gain can be one contributing factor in unexplained weight gain in women. It may signal an underlying hormonal health condition, such as polycystic ovarian syndrome (PCOS) or a thyroid disorder, or could be part of the menopausal transition.

No matter the reason, sudden weight gain is often frustrating, because it can feel completely out of your control, says Allison Christel, MSN, FNP-C, a family nurse practitioner and founder of PlantRx. After all, hormonal weight stems from underlying  physiology, often interacting with diet, lifestyle, and environment. 

How hormones and metabolism interact

To understand why hormonal health conditions may contribute to weight gain, we have to take it back to biology 101: what is a hormone, exactly? And what does the word metabolism mean?

Hormones are chemical messengers for the body. They travel via the bloodstream to deliver messages to your organs and tissues, instigating processes essential to:

• Growth and development (i.e. puberty)
• Sexual function 
• Reproduction
• Mood
• Metabolism

Speaking of, metabolism is the sum of the processes that the body uses to turn food into usable energy. We often associate metabolism with weight management. While an effective metabolism does burn calories that would otherwise be stored as fat, it’s also involved in multiple functions in the body. Metabolism plays a key role in maintaining your energy levels, mood, body temperature, and more. 

To function, metabolism involves many moving pieces too, including hormones. “Hormones serve as the control system for your metabolism,” explains Jaime Knopman, M.D., a board-certified reproductive endocrinologist, physician with Veracity, and the author of the book “Own Your Fertility.” Some hormones’ messages may help the body figure out when to store fat, when to burn food, when you’re hungry, and when you’re full. 

7 key hormones involved in metabolism 

A number of different hormones are involved in metabolism, many of which also play a role in other biological processes.

Here we’ll focus on their impacts on metabolism, including how the body uses, stores, and expends energy..

Estrogen

• Known as: The female sex hormone, though everyone has some estrogen in their bodies
• Produced in: Ovaries, adipose tissue, some bone and muscle cells, and various parts of the brain
• How it impacts metabolism and weight: Most people know estrogen as a female sex hormone, but it’s also essential to regulating how much you eat and how your body turns food into energy. That helps explain the relationship between estrogen and weight gain. The goal is maintaining balanced estrogen levels. If your levels are too low or too high, it may disrupt metabolism and contribute to weight gain. 

Insulin

• Known as: The blood sugar hormone
• Produced in: The pancreas
• How it impacts metabolism and weight: Insulin is involved in fat storage and the regulation of blood glucose, the amount of sugar in the blood. It acts like a doorman, signaling to cells to let blood sugar in. Any blood sugar that isn’t used as energy is stored, often as fat.

Leptin

• Known as: The appetite-regulating hormone
• Produced in: Fat cells (aka white adipose tissue)
• How it impacts metabolism and weight: Leptin helps regulate appetite by signaling to the brain when the body feels too full to eat more. 

Ghrelin

• Known as: The hunger hormone
• Produced in: P/D1 cells in the stomach
• How it impacts metabolism and weight: Ghrelin helps the brain determine when to increase appetite, store fat, and eat more.
  

Cortisol

• Known as: The stress hormone
• Produced in: Adrenal glands
• How it impacts metabolism and weight: While cortisol is nicknamed “the stress hormone,” there’s an association between higher levels of cortisol and more fat storage, particularly around the belly. 
  

Thyroid hormones

• Known as: The metabolic hormones
• Produced in: The thyroid
• How it impacts metabolism and weight: Including Triiodothyronine (T3) and Thyroxine (T4), these help regulate how quickly your cells use energy. The faster your body uses energy, aka the faster your metabolism, the more fuel your body burns, and the less it stores as fat.

Androgens

• Known as: The male sex hormones, though everyone has some androgens in their bodies
• Produced in: Testes or ovaries
• How it impacts metabolism and weight: In people who menstruate, elevated androgen levels are associated with insulin resistance, which can impair how cells respond to insulin and promote fat storage.
  
  

QUICK GUIDE: 7 key hormones involved in metabolism

Estrogen and weight gain during perimenopause and menopause

As a quick refresher, perimenopause is the four- to 14-year transition to menopause, the end of menstruation and the ability to give birth. During this stretch, estrogen levels drop and weight becomes easier to put on, prompting a common question: “does estrogen cause weight gain?” Short answer: It’s complicated. 

Long answer: The direct impact of estrogen dropping is more likely weight redistribution than weight gain. According to Dr. Knopman, the body becomes more likely to store visceral fat, especially in your stomach, when estrogen levels decline. 

When estrogen levels are higher, say, before perimenopause, the body favors storing fat as subcutaneous fat, fat tissue that’s closer to the skin and produces more beneficial molecules. It’s also more likely to store this fat in the lower body, such as the thighs and hips, than around the waist. 

As estrogen dips and more fat is stored viscerally, or closer to internal organs than skin, that secretes inflammatory cytokines and adipokines that contribute to low-grade  inflammation and could contribute to chronic conditions like heart disease. Because this fat is more often stored in the abdomen, it’s sometimes referred to as menopause belly. 

Estrogen’s other impacts as well as other hormonal  shifts during perimenopause can contribute more directly to weight gain. These include:

• Estrogen’s impact on muscle: Among its many functions, estrogen assists with muscle repair and reduces muscle breakdown. Since muscle is more efficient at burning calories when you’re at rest, an increase in muscle often means the body stores fewer calories as fat. When estrogen levels dip, muscle may break down faster, potentially leading to greater weight gain. 

• Sleep disturbances: About 80% of people experience hot flashes during the menopausal transition. When they happen at night, they disrupt sleep. “The sleep disruption that comes with perimenopause also spikes cortisol and hunger hormones, which is a combination that really works against you,” explains Christel. Cortisol itself, for instance, contributes to visceral fat gain. Meanwhile, changes to hunger hormones during menopause can shift eating behaviors and lead to a greater likelihood of emotional eating or more cravings for sugary or salty foods.

• Cortisol spikes: Separate from sleep-related spikes, cortisol also rises in the later stages of the menopause transition, which may further contribute to weight gain.

Other hormone-related causes of weight changes

Menopause isn’t the only cause of hormonal weight gain. Here are some other common culprits that Dr. Knopman and Christel see in their practices..

Hypothyroidism

• What it is: When the thyroid doesn’t produce enough thyroid hormones for the body’s needs
• How it impacts weight: Thyroid hormones play a role in metabolism and energy use, so when the thyroid fails to  produce enough of these hormones, metabolism and energy use can slow and contribute to weight gain. 
• Other common symptoms: Fatigue, trouble tolerating cold, joint and muscle pain

Insulin resistance

• What it is: When the body doesn’t respond to insulin in the way it should
• How it impacts weight: Insulin resistance leads to higher blood sugar levels, and the excess blood sugar is often stored as fat. 
• Other common symptoms: Associated with prediabetes or type 2 diabetes, the latter of which is a chronic medical condition that can cause a variety of symptoms, such as increased thirst, vision problems, and fatigue

Polyendocrine Metabolic Ovarian Syndrome (PMOS)

• What it is: Recently renamed from polycystic ovarian syndrome (PCOS); hormonal health condition caused by an imbalance of reproductive hormones, like androgens and estrogen
• How it impacts weight: PMOS (formerly PCOS) can present a variety of symptoms, and two common ones are difficulty maintaining a healthy weight and insulin resistance. 
• Other common symptoms: Excess hair growth, more acne, feeling fatigued, irregular menstrual cycles

Sleep conditions

• What it is: When someone doesn’t get enough quality sleep due to a condition like insomnia or obstructive sleep apnea 
• How it impacts weight: A lack of sleep can disrupt the normal rhythm of cortisol, may increase ghrelin (aka the hunger hormone) and lead to a decrease in leptin (a hormone that regulates appetite). Together, these three changes may lead to weight gain. 
• Other common symptoms: Extreme fatigue or tiredness, difficulty falling or staying asleep, brain fog

Chronic stress

• What it is: High levels of stress due to emotional pressure, such as being in a toxic workplace or having to balance caretaking with a full-time job, or physical pressure, such as training for a marathon or Iron Man.
• How it impacts weight: High levels of stress over time can disrupt cortisol’s natural rhythm, which could increase  fat accumulation around the belly. Additionally, stress is associated with emotional eating.
• Other common symptoms: Diarrhea or constipation, headaches, lots of aches and pains, difficulty focusing, lack of energy
  
  

Signs your weight gain might be hormone-related

Hormonal weight often follows a few unique patterns:

• Weight gain despite no change in diet, exercise, or lifestyle
• Much of the weight gained is visceral fat, meaning it sits around the midsection
• Weight gain is accompanied by other hormone-related symptoms

Those exact symptoms vary depending on the underlying hormonal imbalance(s), but common ones include:

• Bloating 
• Appetite changes 
• Irregular periods
• Hot flashes
• Low libido
• Mood shifts, e.g. feeling more stressed, anxious, or depressed than usual
• Fatigue or low energy levels
  
  

Treatment options for hormonal weight gain

Weight-loss culture often promotes quick fixes and highly restrictive diets. But depriving yourself or over-exercising is hardly ever the answer—and extreme or unsustainable approaches to weight loss may worsen hormonal balance or be difficult to maintain. “The goal is to work with your hormones through nourishment and lifestyle,” says Christel. 

When researching how to lose estrogen weight gain or hormonal weight more generally, seek guidance and treatment from a qualified healthcare professional, such as an OB/GYN or endocrinologist.Your provider can diagnose the underlying condition and recommend  medications specific to your situation, such as metformin for PMOS/PCOS or hormone replacement therapy for menopause.

Lifestyle changes for hormonal weight gain

Alongside medical treatments and medications, a healthcare provider may offer tailored insight on lifestyle changes that can help address hormonal imbalances, such as the three below.

1. Eat a high-fiber diet and plenty of whole foods

“A high-fiber, whole-food diet is one of the most powerful tools we have because it stabilizes blood sugar, supports gut health, and helps regulate estrogen metabolism all at once,” says Christel. She recommends eating more whole foods than ultra-processed foods, such as packaged granola bars, pastries, and fried food, whenever possible.

This diet also prioritizes sources of fiber, a nutrient that helps someone feel full for longer and assists with blood sugar regulation. 

Popular foods with fiber include:

• Brown rice
• Whole wheat pasta
• Quinoa
• Nuts
• Seeds
• Most fruits and veggies

2. Increase protein intake

Dr. Knopman also recommends increasing your intake of protein, since it plays a role in blood sugar regulation and helps you feel full for longer. Protein also provides the body with the necessary building blocks to build and maintain muscle, which in turn promotes metabolic health. 

Plus, protein may help with other symptoms from certain hormonal health conditions. A 2025 study published in Nutrients suggests an association between high protein intake and less severe menopausal symptoms, such as fatigue, vaginal dryness, and difficulty sleeping. 

Protein can be found in meat, seafood, and many plant foods, like beans and nuts. If you find it hard to get enough protein throughout the day, a high-quality protein powder, like Veracity’s Metabolic Protein Powder, can be an easy way to boost your intake. 

3. Make sustainable lifestyle changes

“Beyond food, consistent sleep, strength training, and stress management move the needle more than most people realize because they directly target the hormonal drivers of weight gain,” says Christel. 

There are many different ways to manage stress, build muscle, or develop a consistent sleep routine, including healthy habits and some supplements. If you want to try supplement support, it’s always best to discuss options with a healthcare provider.

Three Veracity supplements to consider: 

• Perimenopause Support: Made with five antioxidant-rich botanicals to help  promote estrogen balance before and during menopause.
• Cortisol Calming: Formulated with a blend of adaptogens, amino acids, and a nootropic to help your body build resilience to the “fight or flight” stress response.
• Metabolism Ignite: This targeted blend of  plant-based ingredients helps support metabolic health and appetite control. These include Metabolaid, a clinically-backed combination of lemon verbena and hibiscus extracts, caffeine-free green coffee bean extract, and magnesium.
  
  

Working with a healthcare provider and when to seek care

If the pounds are not dropping despite following a healthy diet and exercising regularly, see a healthcare provider. It may make the most sense to first visit a primary care provider who can then refer you to the right specialist, such as an OB-GYN or endocrinologist.

Ideally, you want to work with a clinician who treats the underlying cause instead of providing generic weight loss advice. The answer to this type of weight gain isn’t found in lifestyle alone, but in treating the underlying health condition(s) that’s disrupting metabolism alongside building and maintaining healthy habits. 

Key takeaways

• Hormonal health conditions and transitions can make it more difficult to lose weight, contribute to weight redistribution, or lead to changes in metabolism and appetite. 
• Signs of hormonal weight gain include gaining weight despite a healthy diet and regular exercise, accumulating fat around the belly, experiencing other symptoms associated with hormonal imbalances (like fatigue or bloating), and appetite shifts (like intense cravings or feeling hungry soon after a meal). 
• When hormones are to blame, healthy lifestyle habits still matter, but you might need medication, supplements, and/or medical treatments to move the scale.
• If you’re struggling to maintain a healthy weight and suspect hormones are involved, see a healthcare provider. They can identify the underlying cause and prescribe an appropriate treatment plan.
  
  

Frequently Asked Questions (FAQs)

Does estrogen cause weight gain?

Estrogen does not directly cause weight gain, though dips in estrogen levels are associated with increased fat storage, especially around the stomach. Levels often dip during the menopausal transition, though some hormonal health conditions like PCOS can cause fluctuations in estrogen too. 

What causes unexplained weight gain in women?

Unexplained weight gain in people who menstruate is often related to hormonal imbalances. Hormones are chemical messengers that communicate with systems throughout the body, including metabolism—the biological processes that determine how the body burns energy and stores food as fat. When that communication breaks down, metabolic processes may be disrupted leading the body to store more fat.

Is hormonal weight gain always menopause-related?

While menopause is a leading cause of hormonal weight, it’s not the only one. Thyroid conditions, PCOS, problems with cortisol, and insulin resistance may also result in weight gain. 

Deep dive recommendations 

• Office on Women’s Health. "Menopause."
• National Library of Medicine. "Thyroid diseases." 
• National Center for Biotechnology Information. "Polycystis Ovarian Syndrome." 
• Mary Claire Haver, MD. "The New Menopause."