Why Did I Gain 1 KG After One Late Night Snack? - Nutrition

Share to:

Just one late-night snack?


My height is 153 cm, and my weight has consistently been around 43 kg.
My food intake and caloric intake have not increased.
However, just because I had a late dinner the night before at around 9:00 PM (I only had two egg dumplings, two wontons, some cabbage, and a little vermicelli, without any soup, totaling just a small bowl), and went to bed before midnight, I woke up to find that my weight had increased by 1 kg.
It has been five days, and my weight has not decreased.
The amount I ate that day was not more than usual; it was just that I had dinner later.
I am very confused as to why just one late-night snack would cause a 1 kg increase! Thank you!

Xiao Qing Tian, 20~29 year old female. Ask Date: 2005/01/26

Dr. Cai Xiuwen reply Nutrition


Hello! Weight gain cannot be attributed solely to the food consumed the previous night; it also includes factors such as our activity level, overall health, and any medications taken, all of which can influence weight fluctuations.
Regarding the late-night snack you mentioned, it is unlikely to cause a weight increase of one kilogram.
To better understand the relationship between your weight changes and food intake, you may consider visiting a nutrition consultation clinic to discuss with a dietitian and keep a detailed food diary for several days, documenting 24-hour dietary intake.
This will provide a clearer understanding of your situation.
Wishing you good health.
This response is provided by Dietitian Tsai Hsiu-Wen from Nantou Hospital, Department of Health.

Reply Date: 2005/01/26

More Info


Gaining weight overnight, especially after a single late-night snack, can be perplexing and frustrating. However, it’s essential to understand that fluctuations in weight are not solely due to fat gain. Instead, they can be attributed to various factors, including water retention, food intake, and even the timing of meals.

Firstly, let’s address the concept of weight gain. To gain one kilogram of body weight, you would need to consume approximately 7,700 calories more than your body burns. Given that your late-night snack consisted of a small bowl of food, it is highly unlikely that you consumed enough calories to account for a one-kilogram increase in body weight. Instead, the weight gain you experienced is more likely due to temporary factors.

One significant factor is water retention. Eating late at night, especially if the food is high in sodium, can lead to increased water retention. Sodium causes the body to hold onto water, which can result in a temporary increase in weight. Even if your meal was relatively low in calories, if it contained any salt or if you consumed additional fluids, this could lead to a noticeable increase on the scale the next morning.

Additionally, the timing of your meal can play a role. Eating close to bedtime can affect digestion and metabolism. When you eat late, your body may not have enough time to process the food before you sleep, leading to a feeling of fullness and potential bloating. This can also contribute to temporary weight gain as your body processes the food overnight.

Another aspect to consider is the natural fluctuations in body weight that occur throughout the day. Weight can vary due to factors such as hydration levels, recent food intake, and even hormonal changes. For instance, if you weighed yourself at different times of the day, you might notice variations in your weight. It’s generally recommended to weigh yourself at the same time each day, preferably in the morning after using the bathroom, to get a more accurate picture of your weight.

Moreover, if you have been under stress or have had changes in your routine, this could also impact your body’s water balance and metabolism. Stress can lead to hormonal changes that may cause your body to retain water or alter your appetite.

In your case, since you mentioned that your weight has not returned to normal after five days, it might be worth considering other factors. Have you changed your activity level? Are you drinking more fluids than usual? Have there been any changes in your diet or stress levels? Keeping a food diary and noting your daily activities can help identify patterns that may be contributing to your weight fluctuations.

If you continue to experience unexplained weight gain or if you have concerns about your eating habits and weight management, it may be beneficial to consult with a healthcare professional or a registered dietitian. They can provide personalized advice and help you develop a balanced eating plan that suits your lifestyle and health goals.

In summary, a one-kilogram weight gain after a late-night snack is likely not due to fat gain but rather a combination of water retention, meal timing, and natural body weight fluctuations. Understanding these factors can help alleviate concerns and guide you toward healthier eating habits. Remember, weight management is a long-term process, and occasional fluctuations are normal. Focus on maintaining a balanced diet and regular physical activity for overall health and well-being.

Similar Q&A

Why Did I Gain a Kilo in Two Days? Understanding Weight Fluctuations

On the first day, I weighed 42.1 kg, but within two days, I didn't eat much more than usual. One day, I had a late-night snack, which was a 250-calorie pack of cookies. I maintained my caloric intake between 800-1000 calories. The day after the late-night snack, I noticed my...


Dr. Cai Xiuwen reply Nutrition
Hello! According to your statement, your average caloric intake is around 800-1000 calories. Generally, to gain one kilogram of body weight, you need to increase your caloric intake by an additional 7700 calories. Of course, individual factors such as basal metabolic rate, age, a...

[Read More] Why Did I Gain a Kilo in Two Days? Understanding Weight Fluctuations


Why Am I Gaining Weight Suddenly? Tips for Healthy Weight Loss

I am still a student, and due to many exams, I have developed a habit of eating late-night snacks. Recently, I noticed that I suddenly gained weight—my hip circumference has increased, and my belly has also protruded as if I were pregnant. Additionally, I have grown 3 centimeters...


Dr. Lin Mingxing reply Family Medicine
Eating late-night snacks is not the absolute culprit; the main issue is the lack of corresponding energy expenditure (caloric balance). Considering you have grown 3 centimeters (which is not easy for a 20-year-old female), you are still in your developmental stage. If you want to...

[Read More] Why Am I Gaining Weight Suddenly? Tips for Healthy Weight Loss


Does Eating at Night Really Cause Weight Gain? Nutrition Insights

Hello, I would like to ask if eating at night really makes it easier to gain weight. I've heard that as long as the total caloric intake for the day is within a certain range, it shouldn't lead to weight gain. However, some people say that eating later in the evening in...


Dr. Cai Xiuwen reply Nutrition
Hello! Changes in body weight are primarily determined by caloric balance. If you consume too many calories in the evening and have low physical activity, it will certainly affect your weight. However, some studies have found that excessive intake of simple carbohydrates can lead...

[Read More] Does Eating at Night Really Cause Weight Gain? Nutrition Insights


Does Eating Konjac Before Bed Lead to Weight Gain?

I heard that konjac doesn't cause weight gain, but if I eat one kilogram of it before bed, and then weigh myself the next morning after having a bowel movement, if I still weigh the same one kilogram, does that mean I've gained one kilogram? However, I've also hear...


Dr. Liu Yulai reply Nutrition
NONO: Hello! Wow! Your question is really cute, but it's also a fact! Theoretically, since we cannot distinguish between actual body weight, feces, or recently ingested food, the weight measured is all considered body weight. In research, there is something called error, whi...

[Read More] Does Eating Konjac Before Bed Lead to Weight Gain?


Related FAQ

Weight Gain

(Nutrition)

Eating Habits

(Nutrition)

Underweight

(Nutrition)

Leg Obesity

(Nutrition)

Post-Operative Diet

(Nutrition)

Exercise And Weight Loss

(Nutrition)

Bowel Movement

(Nutrition)

Weight Gain

(Family Medicine)

Thyroid

(Nutrition)

Elderly

(Nutrition)