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What foods cause the fastest weight gain?

Aug 9, 2021
May 2, 2026
Medically reviewed by:
Dr Ivan Puah, MBBS, MOH-Accredited Lipo Doctor, Chairman of Lipo Peer Review Committee

If you're trying to lose weight or prevent weight gain, part of the solution is nutrition. It is challenging to restrain oneself but it is possible!

weight gain

Table of Contents

To help you along, here are some foods (and food groups) that you should avoid to prevent unwanted weight and, particularly, fat gain.

@amarisbclinic Need a game plan to lower your carb level? Here you go! You’ve been following advice on how to lose weight, but to date, nothing significant is happening. Maybe something’s amiss, or perhaps, you’ve been adhering to plain wrong advice. Source: MyFitnessPal #fyp #foryou #foryoupage #tiktoksg #singapore #amarisbclinic #drivanpuah #aesthetics #medicalaesthetics #food #carbs #carbohydrate ♬ original sound - Amaris B. Clinic Singapore

Refined starchy food

Several usual suspects fall under this category, but arguably the most common are potatoes, white bread and pasta.

Boiled potatoes are generally acceptable, but their processed versions in the form of French fries, hash browns and chips are definitely not. 

These are high in calories and are often quickly overconsumed as fries, chips, and mashed potatoes, leading to rapid weight gain.

White bread and pasta have little fibre, which means they are easily digested, causing a spike in our blood sugar levels.

In response, our bodies release a surge of insulin to counteract the effect, which can cause you to feel hungry soon after. Very soon.

Go for: Basmati rice, sprouted bread, sourdough bread, sweet potato, yam, low GI pasta, etc 

@amarisbclinic What foods cause the fastest weight gain? To help you along, here are some food (and food groups) that you should avoid to prevent unwanted weight and, particularly, fat gain. #fyp #foryou #foryoupage #tiktoksg #singapore #amarisbclinic #drivanpuah #aesthetics #medicalaesthetics #weightgain #weightloss #goodfood #weightmanagement ♬ original sound - Amaris B. Clinic Singapore

Sugar is not sweet

It may evoke all things sweet in the head, but sugar is harmful to the body. 

Candies, cookies, ice cream and just about every sugary food are synonymous with weight gain and bad health. 

They affect the body the same way as refined starches do.

Sugar-sweetened beverages, like that glass of your favourite soda, are disastrous for health! 

They contain calories, and consuming them on top of your daily solid food intake is a recipe for rapid weight and fat gain. 

We do need sugar for energy, but they are often extracted from the food we eat. So, added sugars are not necessary.

The tricky bit is that sugar in artificial sweetener form can be found in diet foods advertised as low-fat, low-calorie, and fat-free alternatives. So be mindful.

Go for: Dates, honey, organic peanut butter, high-fibre fruits, etc

@amarisbclinic We need sugar for energy, but it is often extracted from our food. So, added sugars are not necessary. Every sugary food is synonymous with weight gain and bad health. The tricky bit is that sugar in artificial sweeteners can exist in diet food advertised as low-fat, low-calorie, and fat-free alternatives. So be mindful! #fyp #foryou #foryoupage #tiktoksg #singapore #amarisbclinic #drivanpuah #aesthetics #medicalaesthetics #sugar ♬ original sound - Amaris B. Clinic Singapore

Processed meat

Processed meat, such as sausages and hot dogs, is a common contributor to weight gain. 

They contain high amounts of saturated fat, which can raise your cholesterol and blood pressure.

Eating them in large amounts can lead to the development of belly fat in particular, and that's the last thing anyone wants. 

Additionally, you are putting your heart at risk. This is not only true for processed meat but also for red meat in general.

Avoid: Bacon, sausage, hot dogs, pepperoni, deli meats, ham, beef jerky, etc

The ideal first step towards weight loss is to consult a doctor or a nutrition specialist who can advise you on what your body needs and doesn't.

When it comes to prevention or gain, it is best to watch what you eat in terms of amount and the type of food. 

However, weight loss is not as straightforward as we think.

@amarisbclinic Fat loss and weight loss are not the same thing. The terms are often used interchangeably, which contributes to the confusion, and often, many people think losing weight can also lead to stubborn fat loss. Unfortunately, this is not true. #fyp #tiktoksg #tiktoksingapore #weightloss #fatloss #foodsg #exercisesg #selfconfidence #food ♬ original sound - Amaris B. Clinic Singapore

Doctor-led weight management programme

Dr Ivan Puah has over 20 years of clinical experience treating people with weight issues and provides a comprehensive suite of programs to help patients reach their weight goals. 

Losing weight, however, is a process and can be stressful.

In addition to medical intervention, exercise, and nutritional counselling, Amaris B. Clinic offers supervised administration of prescribed GLP-1 medication to support the individual's weight-loss objective.

Approved by the Health Sciences Authority (HSA), GLP-1 medication slows digestion and reduces cravings. It does so by: 

  • Imitating the GLP-1 hormone, a metabolic hormone secreted after food ingestion
  • Slowing stomach emptying
  • Inducing satiety
  • Quelling food cravings
  • Improving insulin sensitivity

Offered in injection and tablet form, depending on the doctor's prescription, you take them weekly via injection or daily before you start your day.

Many clinical studies have shown that patients who combine a calorie-deficient diet, consistent HIIT workouts, and GLP-1 medications can achieve greater weight loss than those who adopt the strategy singularly or with other weight loss medications [1, 2, 3, 4, 5].

@amarisbclinic The horror of empty calories! Empty calories refer to food that has no nutritional value. There are so many foods out there that are masquerading as healthy food when it is, in fact, loaded with sugar and trans fat! Watch the video for more info. #fyp #foryou #foryoupage #tiktoksg #singapore #amarisbclinic #drivanpuah #aesthetics #weightgain #calories ♬ original sound - Amaris B. Clinic Singapore

FAQ

What should I avoid while taking GLP-1 medication?

While there are no restrictions, certain foods can hinder long-term weight management goals, such as ultra-processed, fatty, sugary, alcoholic, sodas, and spicy foods.

What foods should I eat on GLP-1 medication?

Eat smaller but more balanced meals. Focus on adding more lean proteins, high-fibre foods, healthy fats, and water.  

What type of meat should you avoid on GLP-1 medication?

We recommend limiting red meat intake, as it is high in cholesterol, saturated fats, and sodium, which do not help weight loss.

Why am I still hungry on GLP-1 medication?

Hunger is a normal human sensation, and taking GLP-1 medication will not entirely diminish appetite; it just makes you feel full quicker and longer.

What medications cannot be taken with GLP-1 medication?

Do not take GLP-1 medication with medications that lower blood glucose. Your doctor will give you a thorough list of medications to avoid.

LEARN MORE ABOUT WEIGHT LOSS MANAGEMENT

Tailored medical weight loss and management programmes prescribed and monitored by Dr Ivan Puah, who holds a Graduate Diploma in Sports Medicine.

Reference

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