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What foods cause the fastest weight gain?

Aug 9, 2021
April 22, 2026
Medically reviewed by:
Dr Ivan Puah, Medical Director

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 

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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.

@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

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

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