Why do thin people always eat and not gain weight? Revealing the scientific truth behind “easy to lose weight”
"Why some people don't gain weight no matter how much they eat" has been a hot topic on social media and health forums. Data from the entire network in the past 10 days shows that the amount of discussion about "easy to lose weight", "basal metabolism" and "intestinal flora" has surged. This article combines the latest research and hot data to analyze this phenomenon from three dimensions: physiology, genetics, and behavior.
1. Hotspot data on the entire network: Popularity trends of topics related to thin people
| keywords | Search volume (daily average) | Main discussion platform |
|---|---|---|
| Easy to lose weight | 18,500+ | Xiaohongshu, Zhihu |
| High basal metabolic rate | 12,300+ | Station B, Douyin |
| Gut flora and obesity | 9,800+ | Weibo and WeChat public accounts |
2. Physiological factors: the “hidden advantages” of thin people
1.genetic differences: Research shows thatFTOandMC4RIsogenic variation affects fat storage efficiency. About 15% of thin people carry "anti-obesity genes".
| genotype | Influence mechanism | Crowd proportion |
|---|---|---|
| FTO variation | Reduce appetite sensitivity | 8%~12% |
| MC4R mutation | Accelerate energy consumption | 3%~5% |
2.Basal Metabolic Rate (BMR): The BMR of thin people is usually 10% to 15% higher than the average. For a woman weighing 50kg, if her BMR is 1400kcal, her actual daily consumption may reach 1800kcal.
3. Behavioral patterns: the key that is easily overlooked
1.Non-exercise activity expenditure (NEAT): Thin people tend to have more unconscious activities, such as getting up frequently, shaking their legs, etc. Research shows that differences in NEAT can lead to daily caloric differences of up to 350kcal.
| behavior type | Calorie consumption (kcal/h) |
|---|---|
| sit still | 80~100 |
| Standing office | 120~140 |
| move around frequently | 200+ |
2.Differences in eating habits: Thin people are more inclined to "intuitive eating", chew 30% more times on average than fat people, and eat 20% slower.
4. Intestinal flora: an emerging research focus
In June 2024, a sub-journal of "Nature" pointed out that in the intestines of lean peopleBacteroidetesAccounting for a higher proportion (about 42% vs. 30% of obese people), this type of bacteria can break down dietary fiber more efficiently and reduce fat absorption.
5. Advice for those who want to gain weight
1. SelectHigh caloric density foods: Nuts, avocado, olive oil
2. carry outresistance training: Strength training 3 times a week
3. Monitoringactual intake: Most people who think they “eat a lot” actually consume less than 2500kcal per day.
Conclusion: The "eating but not gaining weight" of thin people is the result of the joint action of genes, metabolism and behavior. Instead of being blindly envious, it is better to adjust your own status through scientific methods.
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