Author: Dr. Song Won-seok (Chief Director, mail100yr kmd) This content has been prepared in compliance with the Medical Service Act and related laws.
For People in Their Mid-40s in Seoul, Weight Gain Despite Eating the Same Amount is Due to 'Body Changes,' Not 'Willpower'
Q. I eat the same as before, but why won't my weight drop?
A. By the mid-40s, basal metabolic rate, muscle mass, and hormones all begin to change simultaneously. As a result, even if you maintain the same eating and activity levels as before, much more calories are stored as body fat than previously. This isn't a willpower issue.
According to data from the National Cancer Center Ilsan Hospital Health Report, women in their 40s create a bodily environment where weight gain is more likely to occur due to increased caloric surplus remaining after basal metabolic needs. Additionally, according to the SWAN research from the U.S. National Institutes of Health (NIH) introduced by Kormedi.com, body fat increase and muscle mass decrease begin in the early stages of the menopausal transition, well before menstruation stops, as confirmed through large-scale longitudinal cohort research.
Related clinical data also show that weight tends to drop less easily than before even with the same eating and activity levels maintained, and this may be seen as a natural response to changes in the bodily environment rather than a willpower issue.
In other words, first understanding what is happening in your body right now is the starting point. Since the rate of hormonal change and body composition status differ for each individual, accurate identification of the cause must come first to find an appropriate approach.
4 Changes Happening Simultaneously in Your Mid-40s Body
The feeling of 'weight won't drop even if I eat less' is not simply a misconception. In the mid-40s, the following four changes act simultaneously and make weight management difficult.
| Change Factor | Mechanism | Result |
|---|---|---|
| ① Decreased Basal Metabolic Rate | Muscle mass reduction → decreased energy expenditure at rest | Caloric surplus occurs with the same food intake |
| ② Estrogen Decrease | Fat distribution changes, insulin sensitivity decreases | Concentrated accumulation of abdominal visceral fat |
| ③ Annual Muscle Mass Loss | Decreased metabolic capacity → creates vicious cycle structure | Decreased exercise efficiency, increased yo-yo risk |
| ④ Sleep and Stress Worsening | Ghrelin (appetite increase) ↑, Leptin (appetite suppression) ↓ | Appetite control function deterioration |
According to review research on menopausal muscle mass changes published in PubMed, the natural decrease in estrogen causes complex increases in visceral fat, decreases in bone density, and decreases in muscle mass and strength. World Obesity Federation data explains that menopausal muscle (lean mass) reduction lowers daily basal metabolic rate by approximately 200-250kcal. According to WebMD information, muscle mass can decrease by up to 8% per 10 years after age 40.
Additionally, the IMS 2025 recommendations introduced by Diabetes News emphasize that for middle-aged women in the menopausal transition and menopause stages, simple calorie restriction alone has limitations and an approach from the perspective of body composition reconstruction is necessary.
Ultimately, the conventional approach of "eat less and exercise more" alone is difficult to overcome this complex change. This is precisely why an approach that matches your body's changes is necessary.
mail100yr kmd's Basal Metabolic Rate Recovery-Centered Approach
Maeil Gambi Hwan, which Dr. Song Won-seok began researching personally for his wife's postpartum weight recovery and has been prescribing and improving for over 10 years, is a prescription specialized for mid-40s weight management centered on basal metabolic rate recovery and body fat-focused weight reduction.
It is designed not simply to suppress appetite or just reduce calories, but to reduce body fat by raising basal metabolic rate itself. The prescription process proceeds as follows:
• Understanding constitution and current status — Pre-confirm medications being taken, thyroid function, sleep status, etc. • Stages 1-8 fine-dose adjustment — If uncomfortable reactions such as headaches, nausea, or insomnia appear, immediately lower the stage to address • Transparent disclosure of Mahuang (ephedrine) component — If not suitable for constitution, we do not force prescription, following an honest principle • Yo-yo management design — After weight reduction, provide 6-month yo-yo management package to support weight maintenance
Based on internal prescription data, the average 2-month weight loss is 7.2kg (later average 48 days), body fat-focused reduction rate of 89.9%, and re-prescription rate of 72%. From a safety perspective, based on 17,089 prescriptions, the incidence rate of abnormal liver function tests was confirmed to be within 0.3%.
Responses may vary depending on constitution and symptom severity. Therefore, it is recommended to first confirm individual suitability through consultation.
Things to Definitely Check Before Treatment
Before receiving a prescription for Oriental medicine diet herbal medicine, checking the following items in advance makes safer and more effective prescription possible.
• Current medications being taken — Need to consult about co-administration with blood pressure medication, thyroid medication, neurology medication, etc. • Thyroid function status — If thyroid function is low, the approach to metabolic recovery may differ • Sleep quality and stress level — If there is a sleep disorder, appetite hormone imbalance may already be in progress • Recent liver function test results — Safe with incidence rate of abnormal liver function tests within 0.3% based on 17,089 prescriptions, but if there is existing liver disease, must be disclosed in advance • Plans to combine fasting or food restriction — According to related clinical data, if combined with excessive food restriction, basal metabolic rate decreases together, increasing yo-yo risk, so consultation on dietary direction is recommended • Abdominal obesity status — The Korean Society for the Study of Obesity Clinical Guidelines 2022 sets female waist circumference of 85cm or more as the abdominal obesity standard and recommends 5-10% body weight reduction as a primary goal within 6 months
For those looking for a diet Oriental medicine clinic in Jung-nang-gu, those needing Meokgol Station Oriental medicine diet consultation, or those considering Seoul menopausal weight management, consultation is available through in-person or non-face-to-face visit.
We Will Consult with You Step by Step from the Beginning
At mail100yr kmd, we provide step-by-step consultation from basal metabolic rate recovery to yo-yo management.
Weight gain in the mid-40s is not due to insufficient willpower. It is a result of simultaneous changes in hormones, muscle mass, sleep, and metabolic rate. Therefore, an approach that fits 'your body's condition' comes first.
If starting initially seems burdensome, trying a 1-month 110,000 won short-term option to check your body's response is also good. You can either visit mail100yr kmd directly near Meokgol Station in Jung-nang-gu, Seoul, or start from anywhere through nationwide non-face-to-face consultation and mail delivery prescription.
Frequently Asked Questions
Q1. Is weight gain in mid-40s due to hormones or age?
Both. Hormonal changes (estrogen decrease) and muscle mass loss due to aging work together to lower basal metabolic rate and increase body fat accumulation. Since it is not a problem of one factor alone but a complex cause, an approach that examines both constitution and body composition status is necessary.
Q2. I heard Mahuang (ephedrine) is included in Oriental medicine diet herbal medicine—is it safe?
Maill Gambi Hwan contains Mahuang (ephedrine) component, and this fact is disclosed transparently from the beginning. Through BMJ (2015) research, it has been confirmed that the hepatotoxicity of Mahuang-containing herbal medicine is similar to that of general pharmaceuticals, and the incidence rate of abnormal liver function tests based on 17,089 prescriptions is also within 0.3%. We maintain the principle of not prescribing if it is not suitable for constitution, so we first confirm suitability through consultation. Responses may vary depending on constitution and symptom severity.
Q3. I can't visit the hospital directly, but can I receive prescription through non-face-to-face consultation?
Yes, it is possible. mail100yr kmd operates nationwide non-face-to-face consultation and mail delivery prescription services, so those residing in areas outside Seoul can proceed from consultation to prescription without in-person visits. When providing information about current health status and medications being taken during the initial consultation, more accurate prescription is possible.
Responses may vary depending on constitution and symptom severity.