Loyal to boot camp classes? Check. Eating healthy food? Check. Drinking lots of water? Check. But still, pounds are creeping around your waistline – wondering why?

Fast weight gain reasons could involve many factors. There is no match for a satisfaction of wearing clothes which not only looks good but also fits perfectly. If your skinny jeans getting tighter and you haven’t done any practice differently, you need to figure it out.

TBH, there are simple weight loss hacks to follow, if you’re not under any medical condition. Medical problems are primary reasons for sudden weight gain from beta-blockers to birth control pills – everything in between – adds little or lots of fats.

over weight

Further, your midsection spread is most likely because of your couch and snack shelf but recent scientific studies indicated that there are less obvious factors which are the major contributors.

[fact text=”To keep track of your calories intake versus calories eat up, double check your routine to-do fitness list.” type= “hack”]


Rapid Weight Gain Reasons

Many of us get frustrated when we achieve disappointing results. In order to get some sound clues, we have listed 11 rapid weight gain reasons which might help you out to trail down your routine or health flaws that are currently going unchecked.

This article contains:

  1. Your Thyroid Gland is Out-of-Order
  2. A Portion Size Important, No Matter What You Eat
  3. Hormonal Imbalance
  4.  Dehydration
  5. Side Effects of Weight Loss Drugs
  6. Spinning Obsession
  7. Poor Digestion
  8. Overeating Iron
  9. Depression
  10. Staying Up Late Night
  11. Stressful Job & Workload

1. Your Thyroid Gland is Out-of-Order

Thyroid gland located in the neck area below Adam’s apple helps in regulating metabolism that is among other body functions.

Underactive thyroid can cause sudden weight gain, although it becomes inactive slowly weight gain is quick and obvious.

Doctor Checkup


Slow malfunctioning is the reason why most of us can’t detect the symptoms in order to do some sort of remedy.

[fact text=”The worst scenario is when thyroid stops working and no matter, how hard you follow your weight loss diet plan, shedding pounds becomes nearly impossible. In such a case, avoid do-it-yourself medication, consult your doctor.” type= “gen”]

2. A Portion Size Important, No Matter What You Eat

Meal portion size is as vital as eating healthy food. Like quinoa, avocado, nuts, dark chocolate, nut butter – all these often part of our diet plans. If overeaten, it can disturb our whole weight loss diet plans we’ve ever made.


Learning portion size is tricky and people confuse even cup of breakfast cereal sizing.

You might be thinking how to control portion meal?

Don’t worry, here we are providing some portion control life hacks to lose weight:

  • Shredded cheese or nut butter portions must not exceed ping-pong ball size.
  • Rice or pasta serving must not be more than your fist size.
  • Lean meat size must be about the size of the deck of cards.

3. Hormonal Imbalance

Hunger control hormone – Leptin guides us when to eat when you have already eaten enough of the food. Imbalance of this hormone keeps you hungry even after eating enough of the portion size.


Over-dosing yourself with fruit diet increases the quantity of fructose – a natural sugar often found in fruits. So watch out, because fructose can be converted into fat by your body before it is used as fuel.

More fructose intake the more leptin would be released, hence your body would skip the original functioning message altogether. In such a case, your brain won’t be able to tell that you don’t need any more food and you’re full.

Cortisol imbalance is among the other rapid weight gain reasons. Our body releases this hormone when it’s in stress. Higher the cortisol levels, higher the blood sugar conversion into fat. It is a kind of a body defense mechanism to store fat.

4. Dehydration

It is a state in which the ability of our body to burn fats lowers, calories start storing and body’s metabolism slows down. This way, our body starts gaining weight.


2/3 of a human body is composed of water that is 60-70% on average in adults. Water lubricates our joints and eyes, supports digestion, excretes body wastes and makes our skin glowing.

It is recommended by Dawn Jackson Blatner, RD – author of ‘The Flexitarian Diet ‘You should drink at least 16 ounces of water before eating any meal.

The water gives your belly a fuller feeling and it prevents your body from overeating.

5. Side Effects of Weight Loss Drugs

Taking medicines for treating fats can cause gain some extra pounds.
You may not know the reason behind it because we think taking medicines is good. In reality, drug overdose can increase our body’s tendency to gain weight massively.


Thus, if you start gaining weight after having your prescribed medicine, you can’t blame it. Similarly, Beta blockers, steroids, breast cancer medicines and birth control pills are involved in quick weight gain reasons.

By any means, it isn’t possible to lose weight if you are on any such drugs.

Why? Simply because these drugs affect your appetite and metabolism.

However, it is not recommended to stop taking these medicines but do follow your doctor’s advice and medical prescription.

6. Spinning Obsession

People who choose for cardio-spinning for losing weight should be aware that it has some pitfalls. It only decreases 60% of fat and 40% of lean muscle.
As shared by senior fitness consultant, Mantell from the American Council on Exercise:

“And we don’t want to lose lean muscle, because lean muscle burns more calories per pound, per day than fat does.”


Spinning class obsession can indeed add up bulk to your thighs which aren’t fat but muscle.

How can spinning obsession lead to rapid weight gain? The workout would make you feel hungrier and many of us may think this gives us the chance to hop on fries as it could go with our personal cheat sheets.

Although cardio is effective and it has a high-intensity workout that supports in burning calories, you need more resistance training to control increasing weight.

If weight loss is your main goal, get some resistance training courses along with spinning exercises e.g. weight lifts (free weights), push-ups, lunges, and squats. This is a solid advice for everyone following weight loss program.
More the resistance training other than spinning, the better would be the outcome.

7. Poor Digestion

Healthy stomach lowers typical risks like inflammation, and it boosts your energy levels; While overall health of your stomach directly affects your body shape.
According to the NJ Nutritionist, more than 60 million Americans are facing digestive disorders that include: bloating, heartburn, diarrhea, constipation, and gastro.

stomach pain

Digestive system improper functioning leads to accumulation of wastes and toxins in the body. It leads the stomach ability to break down food suppresses, and in return, obesity occurs.

If you are struggling to drop extra pounds, do consider your digestive system because if it isn’t working properly, then you are not only heading towards gaining weight but it would probably induce several other health issues that include:

  • Fatigue
  • Depression
  • Stress
  • Bloating
  • Gastro
  • Heartburn
  • Constipation
  • Poor nutrients absorption
  • Hormonal imbalance

The absorption of essential nutrients, minerals, and vitamins is crucial in the body because if our digestive systems fails to work properly, then our body’s metabolism goes sluggish. The rate at which your calories were being burnt previously would reduce, leading to obesity and fatigue.

Common Digestion Issues & Quick Fixes

1-Acid Reflux Disease:

It is a burning sensation in the lower chest area when stomach acid pushes up.
Quick fix: Prilosec and Zantac are the counter meds without weight gain side effects.


Usually, ulcer develops along stomach lining because of too much acid production.
Quick fix: Stop taking ibuprofen or aspirin as both these pose the threat of internal bleeding. Instead, take Acetaminophen, or Tylenol to get relieved from pain.


It is a common digestion issue in which bowel movements aren’t frequent.
Quick fix: Take 25-30 grams of whole foods fiber each day, and drink 2-3 liters of water and exercise in routine.

4-Irresistible Bowel Syndrome (IBS)

It is a sort of leaky gut or imbalance of bacteria both good & bad. It can cause bloating and inflammation in the stomach.
Quick fix: Try gluten-free or FODMAP because it can control fast gain.

8. Overeating Iron

Higher the iron-based weight loss diet, the more you would feel hungrier. As a result, more would be your food consumption.

According to Wake Forest Baptist Medical Center in North Carolina that high iron intake suppresses the leptin, and the hormone responsible for appetite regulation.

Though iron is an important nutrient that your body requires, you need to be careful in its daily consumption. Note that in a 6-ounce steak there is about 6mg of iron.


It is said that people who consume iron-rich foods in a large quantity are at greater risk of getting few diseases like Alzheimer’s, diabetes and fatty liver disease.

Thus, take the necessary amount of iron and avoid over consumption to avoid the problem of weight gain.

Here are few recommendations made by Donald A. McClain, Director, Center on Diabetes, Obesity and Metabolism:

  • Women from 18 to 50 years of age should consume 18 mg per day.
  • Women from 51 and above years of age should consume 8 mg per day.
  • Eat one pound of red meat per week on an average.
  • The body absorbs iron from nuts, beans, tomatoes and spinach relatively easy in comparison to red meat.

9. Depression

Depression is one of the severe medical illnesses and it equally affects your physical and mental health.

According to Alissa Rumsey, the Spokesperson and Registered Dietitian from Academy of Nutrition and Dietetics:

[fact text=”As many as 25% of people taking certain antidepressants report gaining ten pounds or more.” type= “book”]

Taking antidepressants may cause the craving for more food like carbohydrates. Since in depression, there is a lack of appetite but once antidepressants come in effect, people start overeating.


By switching medication, body mass can be controlled, however changing meds might not be as effective for depression. So, there will be a lot of trial & error, says Rumsey.

Nearly all antidepressants cause weight gain, but our bodies react differently. Some people gain others don’t. But here are some common antidepressants that are likely to cause a sudden weight gain in comparison to other medicines.

  • Tricyclic antidepressants e.g. amitriptyline, imipramine (Tofranil) and doxepin
  • Monoamine oxidase inhibitors e.g. phenelzine (Nardil)
  • Paroxetine, selective serotonin reuptake inhibitor (SSRI)
  • Mirtazapine (Remeron)

Most of the people start gaining weight not only because of antidepressants but there are many other factors which could be popular life hacks to lose weight, must be considered during the therapy.

For example, depressed person overeats and stays inactive.

The mind-body relation is very complex. A very common question is, ‘Do we put on weight because of depression or we get depressed because of weight gain?’

Here are few practices that a person can adopt for reducing his depression.

Tips to Overcome Depression:

  • Spend time in nature.
  • Take a long, hot bath.
  • Exercise and eat healthy.
  • Watch a funny play or movie.
  • Keep a pet and try to spend time with him.
  • Talk to a friend, plan for a movie or lunch with him.
  • Pick up an old hobby or any sport you like to play.
  • Take a trip to mountains, museum, any place you like.

10. Staying Up Late Night

Nearly all of your efforts would be nullified if your sleeping pattern is disturbed or you take less sleep. Higher BMI (Body Mass Index) and larger waistline could be credited to shorter spells of sleep.

Research study proposes that our brain doesn’t respond to ‘portion control’ and strongly responds to ‘junk food’ especially when people tend to have a lack of sleep.


This causes Ghrelin- a hunger hormone production to increase and we take shorter amounts of sleep.
How to get a normal sleep?

For getting a better sleep, you should follow your body’s natural sleep cycle.

During the day, try to do some weight loss exercises, because tiredness leads to getting better sleep.

[fact text=”The eating and drinking patterns do impact your sleep. Therefore, minimize your caffeine and nicotine consumption, plus avoid alcohol and don’t eat heavy food before sleep.” type= “hack”]

Alissa Rumsey suggests 7-8 hours of night sleep. Make sure you take this much of sleep to follow the natural sleep pattern.

11. Stressful Job & Workload

Your demanding job may cause you stress more often, and that might be the weird reason why you are gaining weight.

In addition, Cortisol hormone is released when we are in stress relocating triglycerides to visceral fat cells, consequently, elevating fat storage in the belly.

job stress

The blood glucose levels increase due to cortisol that suppresses insulin affects and this is the reason, why we start feeling hungry and overeat. In a worst case, blood glucose stored as fat in our bodies.

In order to tackle job stress, you should share the workload with your manager. Come to the office early so that, you can start working when no one around is bugging or disturbing you.

Furthermore, take a break in the evening and have some stress relieving detox tea, it’s a life hack for weight loss too.

Consequently, your weight measuring machine scale won’t be sneaking upwards without any reason. There would always be a reason.

Nutrition promise has made it incredibly easy by listing out some of the rapid weight gain reasons that could be weird and troublesome. We hope after recognizing the above reasons, you can easily find a remedy to get back into a slimmer shape and a healthy lifestyle.

[fact text=”The information shared on this website is solely for awareness and educational purpose. For getting a medical advice/prescription or treatments, please consult your doctor. Any action you take upon the information provided by Nutrition Promise is strictly at your own risk.” type= “gen”]


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