Why You Are Gaining Weight: All You Need To Know

Why You Are Gaining Weight

Do you feel like you’ve been putting on weight lately, but you can’t seem to figure out why? You’re not eating any more than usual, and you’re exercising the same amount as always. What could be causing this unexplained weight gain? There are many possible reasons for it, some of which are quite surprising. In this blog post, we will discuss 9 of the most common reasons for unexplained weight gain. Keep reading to find out more!

9 Reasons For Unexplained Weight Gain

Here are 9 solid reasons for unexplained weight gain:

Lack of Sleep

When you don’t get enough sleep, your body releases hormones that can increase your appetite, leading to increased cravings and overeating. Moreover, when you don’t have enough energy, you won’t feel motivated to exercise.

Here are 5 reasons that might be affecting your sleep:

  • Too much caffeine, alcohol, or sugar
  • Stress and anxiety
  • Irregular sleeping patterns
  • Poor sleep quality
  • Certain medications

Unhealthy Eating Habits

Unhealthy Eating HabitsEating a diet that is high in unhealthy fats, refined carbs, and processed foods can lead to weight gain due to its high-calorie content. Processed foods are typically higher in calories and contain fewer vitamins, minerals, fiber, or healthy fats than whole foods. Furthermore, eating large portions can lead to weight gain.

Here are 5 reasons why you might be eating unhealthy:

  • Eating out often
  • Too busy to cook
  • Comfort eating
  • Boredom or stress eating
  • Mindless eating

Slow Metabolism

When the body’s metabolism is slow, it’s not able to burn off calories as quickly, leading to weight gain. Factors that can slow the metabolism include aging, genetics, and hormonal imbalances.

Here are 5 other things that can slow down your metabolism:

  • Eating too little
  • Overeating processed foods
  • Not getting enough protein in your diet
  • Not doing enough exercise routinely
  • Lack of sleep.

Sedentary Lifestyle

Sedentary LifestyleA sedentary lifestyle, or lack of physical activity, is one of the most common causes of weight gain. When you don’t exercise regularly, your metabolism slows down and you’re more prone to overeating and cravings.

Here are 5 reasons why you might not be getting enough physical activity:

  • Not having enough time in the day
  • Lack of motivation
  • Feeling too tired due to stress or other health issues
  • Not finding activities that you enjoy doing
  • Having an injury or disability that prevents exercise

Stress and Anxiety

Stress can cause people to eat more than they usually would, leading to weight gain. In addition, when cortisol (the stress hormone) is released by the body, it can cause cravings for unhealthy foods that are higher in calories, sugars, and fats.

Here are 5 reasons why you might be feeling stressed or anxious:

  • A busy work/home life
  • Overwhelming responsibilities or expectations from others
  • Negative self-talk or perfectionism
  • Feeling a lack of control over your life
  • Financial worries

Hormone Imbalance

An imbalance in hormones can lead to increased appetite, cravings for unhealthy foods, and weight gain. Common causes of hormonal imbalances include thyroid disorders, low testosterone levels, depression, and menopause.

Here are 5 signs of a hormone imbalance:

  • Fatigue or insomnia
  • Unexplained weight gain/loss
  • Low libido
  • Mood swings or irritability
  • Digestive issues


Some prescription medications can have the side effect of weight gain, such as certain antidepressants and corticosteroids. It’s important to speak to your doctor about any medication you are taking and ask if it could be causing you to gain weight.

Here are 5 medications that can cause weight gain:

  • Antidepressants
  • Birth control pills
  • Corticosteroids
  • Beta-blockers
  • Anti-seizure drugs

Poor Gut Health

The bacteria in our gut play an important role in metabolism, digestion, and overall health. If we don’t consume enough probiotics or prebiotics (such as yogurt, sauerkraut, and kimchi) our gut bacteria can become imbalanced, leading to weight gain, bloating, and other digestive issues.

Here are 5 signs of poor gut health:

  • Constipation or diarrhea
  • Abdominal pain or cramping
  • Bloating or gas
  • Food allergies/intolerances
  • Excess sugar cravings

Thyroid Issues

Thyroid IssuesAn underactive thyroid (hypothyroidism) can cause weight gain due to its effect on metabolism. Common symptoms include fatigue, dry skin, weight gain, constipation, and depression. If you are experiencing any of these symptoms it’s important to speak to your doctor.

Here are 5 other signs of an underactive thyroid:

  • Muscle aches and joint pain
  • Feeling cold when others don’t
  • Hair loss or thinning hair
  • High cholesterol levels
  • Irregular menstrual cycles

Alcohol Consumption

Consuming too much alcohol can lead to weight gain due to the high-calorie content of alcoholic drinks. Regular consumption of alcohol can also disrupt hormone production, particularly testosterone, leading to increased appetite and cravings for unhealthy foods.

Here are 5 tips for reducing your alcohol intake:

  • Set limits around how much you will drink each day/week
  • Replace alcoholic drinks with no-calorie alternatives such as sparkling water or unsweetened tea
  • Choose drinks with lower alcohol content such as light beer or wine spritzers
  • Don’t drink on an empty stomach; always have food alongside your drinks
  • Avoid pre-mixed alcoholic drinks that are high in sugar


Not drinking enough water can lead to dehydration which in turn can cause weight gain. Staying hydrated is essential for optimal health as it helps regulate hormones, flush out toxins, and improve digestion.

Here are 5 signs of dehydration:

  • Thirst or dry mouth
  • Headaches or dizziness
  • Muscle cramps or fatigue
  • Dark yellow urine
  • Dry skin


Unexplained weight gain is a common issue that many people grapple with. If you’re experiencing an increase in your body weight despite no changes to your diet or exercise, it’s important to talk to your doctor about the potential causes. They can help diagnose any underlying medical conditions and prescribe the appropriate treatments for them. Even if there isn’t an underlying medical issue, understanding the causes of your unexplained weight gain can help you make lifestyle changes and improve your overall health.

Consider contacting FitMantra for additional information on nutrition and fitness. You can also get in touch with their nutrition experts through our online nutrition counseling, who can guide you through the process and help you achieve your fitness goals. You can also lose weight with the help of our weight loss program. Download our Fitness app on  Android to learn more about us.

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