Most of us eat mindfully and stay active, but the numbers on the scale keep climbing. And this feels very confusing and unfair. Weight gain is often attributed to the simple formula of calories in versus calories out. Well, the cause is not always food or lack of exercise. Energy balance matters; hormones are the biochemical regulators that determine how the body stores fat, controls appetite and manages metabolism. Hormonal imbalance can result in fat accumulation even when diet and activity seem to be under control.
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Take this two-minute read to learn how hormones influence weight, 5 hormones associated with weight gain, and evidence-based strategies to maintain them balanced and functioning well.
How Hormones Influence Body Weight?
Hormones act as a signalling component that controls hunger, satiety, insulin, stress and metabolic rate. When these signals are interrupted owing to stress, improper sleep patterns, poor diet quality, health conditions or ageing, then the body:
Increase appetite and unwanted cravings
Store more fat, especially around the abdomen.
Reduce metabolic rate, sluggishness and lethargy.
Increase water retention and bloating.
Also Read: Hormone Balancing Foods: Choose The Right Ones
Promote insulin resistance and fluctuation in blood sugar levels.
5 Hormones That Can Cause Weight Gain
Insulin
Insulin is the fat storage hormone that controls blood glucose by helping cells absorb sugar for fuel. Continuously high insulin levels lead to hyperinsulinemia, often caused by frequent intake of refined carbs or insulin resistance, promote fat storage and reduces fat burning.
How Does It Lead To Weight Gain?
Increases fat storage, especially around the abdomen.
Stimulates hunger feelings shortly after meals.
Promotes insulin resistance over time.
Common signs of this include frequent hunger, sugar cravings, fat accumulation and sudden energy crashes.
Cortisol
Cortisol, the stress hormone, is released during physical or emotional stress. While it is beneficial in the short term, a chronic rise leads to increased appetite and visceral fat accumulation.
How Does It Lead To Weight Gain?
Increases cravings for high-sugar and high-fat foods.
Promotes abdominal fat storage.
Raises blood sugar levels.
Common signs of high cortisol levels include stress eating, improper sleep, tiredness and belly fat even after having a normal diet.
Leptin
Leptin is the satiety hormone that sends signals to the brain when you are full. When you are in a leptin resistance state, the brain does not respond, causing persistent hunger feelings and making you overeat despite adequate amounts of fat stored.
Also Read: Why Am I Always Hungry? Here Are 7 Possible Reasons And Ways To Manage Increased Appetite
How Does It Lead to Weight Gain?
Lowers satiety signalling.
Increases overeating.
Sluggish metabolism
Common signs of leptin resistance include feeling hungry soon after eating, difficulty losing extra kilos, and late-night cravings.
Ghrelin
Ghrelin, the hunger hormones stimulate appetite and elevates up before meals. Poor sleep patterns, chronic stress and restrictive dieting practices can raise ghrelin levels, making you feel very hungry.
How Does it lead to weight gain?
Increases appetite and makes you binge eat.
Makes dieting difficult.
Common signs include strong hunger signals, increased appetite after poor sleep and unwanted cravings even during dieting.
Thyroid Hormones (T3 & T4)
The thyroid hormones (T3 and T4) play a vital role in controlling overall metabolism. Low thyroid function (hypothyroidism) slows metabolism, leading to weight gain even without increased calorie intake.
How Does It Lead To Weight Gain?
The rate of metabolism and calorie burning slows down.
Increases fluid retention and bloating.
Reduces energy levels.
Common signs include unexplained weight gain, exhaustion, cold intolerance and dry skin.
How to Prevent Hormone-Related Weight Gain
Prioritise Blood Sugar Control
Eat a wholesome and balanced diet including the right proportion of protein, dietary fiber and healthy fats. Avoid refined sugars and ultra-processed carbs. This helps to improve insulin sensitivity and regulate blood sugar spikes.
Manage Stress Effectively
Stress is a known factor that can wreak havoc with your hormone balance; hence, it is important to combat stress. Practise meditation, yoga or deep breathing exercises to stay calm, relaxed and maintain hormonal health. Spend quality time outdoors with your loved ones and engage in hobbies that interest you. Managing stress helps to regulate cortisol production.
Optimise Sleep Quality
Sound quality sleep is essential for augmenting overall well-being. Good sleep lowers ghrelin secretion, improves leptin sensitivity and reduces cortisol.
Exercise Regularly
Staying active boosts metabolism and maintains hormone balance. Combine strength training exercises with a moderate cardio workout. This improves insulin sensitivity, supports metabolism, and avoids overexertion, which can raise cortisol levels.
Power-up with Protein
Protein is a key macronutrient that maintains satiety hormone balance and controls blood sugar. Ensure you add high-quality protein foods to every meal and aim for 1.0-1.2 grams of protein per kg of body weight, depending on your activity level.
When to Seek Medical Help?
If you observe that weight gain is persistent or accompanied by extreme fatigue, irregular menstrual cycle, hair loss or mood swings, consult your doctor. Hormonally associated health problems like hypothyroidism, PCOS, or metabolic syndrome may require appropriate medical treatment.
Conclusion
Weight gain is not all about extreme dieting and exercise; it is strongly influenced by hormonal signalling. Maintaining a proper sleep schedule, easing stress, eating wholesome meals, and staying active can help you optimise your hormone function and promote weight loss.
References:
Hormonal Determinants of Growth and Weight Gain in the Human Fetus and Preterm Infant
Laura Page 1, Noelle Younge 2, Michael Freemark 1,
https://pmc.ncbi.nlm.nih.gov/articles/PMC10537367/
A Review of Weight Control Strategies and Their Effects on the Regulation of Hormonal Balance
Neil A Schwarz 1, B Rhett Rigby 1, Paul La Bounty 1, Brian Shelmadine 1, Rodney G Bowden 1,*
https://pmc.ncbi.nlm.nih.gov/articles/PMC3147122/
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