From the *Huangdi Neijing* to Modern Science: Constitutional Typology in Traditional Chinese Medicine and Personalized Wellness Practices

Introduction: Why Does Your Constitution Determine Your Health? The “密碼” of the Human Body That Everyone Today Needs to Understand

Have you ever noticed that even when people stay up late, some are still full of energy the next day, while others are so weak they have to take a sick day? Or that even when people eat ice cream, some have no digestive issues at all, while others get such severe diarrhea that they become dehydrated?
More than 2,000 years ago, traditional Chinese medicine noted: “Each person has unique imbalances in qi, blood, yin, and yang.” This is the mystery of “constitution.”

Modern science has further discovered that constitutional type not only influences susceptibility to disease but is also closely linked to gene expression, the gut microbiome, and the neuroendocrine system. For example, research by the World Health Organization (WHO) shows that people with a “cold” constitutional type are more prone to cardiovascular disease, while those with a “hot” constitutional type tend to have a faster metabolic rate.

This article will take you from the theory of Yin-Yang and the Five Elements in the *Huangdi Neijing* to a modern molecular biology laboratory. Through three international case studies and four authoritative research studies, you’ll gain a thorough understanding of “constitutional typing”—an ancient yet cutting-edge field of health science.

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The Foresight of the *Huangdi Neijing*: The Origins and Modern Evolution of Constitutional Typology

From the “Twenty-Five Types of Yin and Yang” to the “Nine Constitutions”

The *Huangdi Neijing* classifies people into five types—“Wood, Fire, Earth, Metal, and Water”—with each type further subdivided into five categories, forming the theory of the “Twenty-Five Yin-Yang Constitutions.” For example, people of the Wood type are often slender and cautious, corresponding to the “Qi-stagnation constitution” in modern constitutional typology; people of the Earth type are broad-minded and steady, similar to the “balanced constitution.”

Modern Traditional Chinese Medicine, drawing on clinical practice, has simplified constitutional types into nine categories: Balanced Constitution, Qi Deficiency Constitution, Yang Deficiency Constitution, Yin Deficiency Constitution, Phlegm-Dampness Constitution, Damp-Heat Constitution, Blood Stasis Constitution, Qi Stagnation Constitution, and Special Constitution. Among these, the Phlegm-Dampness Constitution is closely associated with obesity and hyperlipidemia, while the Qi Stagnation Constitution is prone to psychological issues such as anxiety and insomnia.

How does modern science validate the theory of constitutional types?

A research team led by Academician Wang Qi at Beijing University of Chinese Medicine published a study in *Cell Discovery* revealing that individuals with a “phlegm-dampness” constitution have significantly reduced levels of *Pseudomonas exoflavon* in their intestines, along with decreased levels of the metabolite phytospermidine, leading to disrupted lipid metabolism. This study not only corroborates the Traditional Chinese Medicine theory of “internal obstruction by phlegm-dampness” but also provides a molecular basis for the development of probiotic treatment regimens.

A team led by Professor Zhu Dong at Nanjing University of Chinese Medicine has developed a “dynamic monitoring technology for blood stasis,” which uses fluorescent probes to observe changes in blood viscosity in real time, demonstrating that traditional Chinese medicines such as Danshen—which promote blood circulation and dispel blood stasis—can significantly improve microcirculation. This technology was published in *Chemical Engineering Journal* and provides visual evidence for constitutional typing.

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A Detailed Explanation of the Nine Constitution Types: From Characteristics to Scientific Mechanisms

Balanced Constitution—The Natural "Healthy Standard Body Type"

Features: A rosy complexion, abundant energy, good sleep, and strong adaptability to the environment.
Scientific Basis: A WHO study shows that people with a "peaceful" temperament have lower levels of the inflammatory cytokine IL-6 and a more stable immune system.
Key Points for Health and Wellness: Maintain a balanced diet and exercise regularly; avoid overexertion.

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Qi Deficiency Constitution—People Who Always Feel “Low on Energy”

Features: Easily fatigued, short of breath, reluctant to speak, and prone to sweating at the slightest exertion.
Scientific Mechanisms: An NCBI study found that individuals with a qi-deficient constitution exhibit impaired function of the hypothalamic-pituitary-adrenal (HPA) axis and insufficient cortisol secretion, leading to a reduced ability to respond to stress.
Treatment Plan：

• Food and Drink: Eat more qi-tonifying foods such as Chinese yam and astragalus, and avoid raw and cold foods.
• Sports: The “Breathing and Qi-Nourishing Posture” from the Eight Brocades can improve cardiovascular and pulmonary function.
• Case Studies: Kelly, an American English teacher, lost 4 kilograms in half a month by drinking a spleen-nourishing, dampness-eliminating herbal tea substitute, and her energy levels improved significantly.

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Yang Deficiency Constitution—People Whose Internal “Heater” Has Broken Down

Features: Sensitivity to cold, cold hands and feet, and a preference for hot food.
Scientific Mechanisms: Research has found that people with a yang-deficient constitution have abnormal mitochondrial function and reduced energy metabolism efficiency, similar to a malfunction in the “cell’s power plant.”
Treatment Plan：

• Food and Drink: Warm and tonifying ingredients such as lamb, ginger, and cinnamon, combined with moxibustion on the Guanyuan acupoint.
• Sports: Practicing Tai Chi in the morning can promote the rise of yang energy.
• Case Studies: The Acupuncture Department at Gansu Provincial Hospital of Traditional Chinese Medicine uses a combination of “moxibustion and acupoint thread implantation” to help obese patients regulate their yang-deficient constitution, achieving a 3-year weight maintenance rate of 76.8%.

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Yin-Deficiency Constitution—People Whose Internal “Reservoir” Has Dried Up

Features: Dry mouth and throat, heat in the palms and soles, and difficulty sleeping.
Scientific BasisA study published in *J Affect Disord* shows that abnormal serotonin levels in the hypothalamus among individuals with a "yin deficiency" constitution are strongly associated with depressive mood.
Treatment Plan：

• Food and Drink: Yin-nourishing ingredients such as silver ear mushrooms, lily bulbs, and goji berries; avoid spicy foods.
• Sports: Evening "Yin Yoga" helps relax the nerves.
• Case Studies: Xiaolin, a middle school student, not only improved her insomnia but also saw significant relief from her depression by taking Chinese herbal medicine that nourishes yin and reduces internal heat.

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Phlegm-Dampness Constitution—The Troubles of a “Greasy” Constitution

Features: Abdominal obesity, oily skin, and a thick, greasy coating on the tongue.
Scientific Mechanisms: A research team led by Wang Qi at Beijing University of Chinese Medicine has discovered that individuals with a phlegm-dampness constitution lack the bacterium *Fusobacterium perryi* in their gut microbiota, leading to lipid metabolism disorders.
Treatment Plan：

• Food and Drink: Ingredients that help eliminate dampness, such as Job's tears, dried tangerine peel, and poria, and avoid foods high in sugar and fat.
• Sports: Aerobic exercises such as brisk walking and swimming boost metabolism.
• Case Studies: Changchun University of Traditional Chinese Medicine has developed “Ginseng and Poria Paste,” which regulates the gut microbiota in individuals with a phlegm-dampness constitution; its clinical efficacy rate reached 82%.

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Blood Stasis Constitution—The Hidden Dangers of "Stagnant Blood" in the Body

Features: Dull complexion, purple lips, and menstrual cramps.
Scientific Mechanisms: Nanjing University of Chinese Medicine has developed a fluorescent probe technology that reveals significantly elevated blood viscosity and microcirculatory disorders in individuals with blood stasis constitution.
Treatment Plan：

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• Food and Drink: Ingredients that promote blood circulation, such as hawthorn, safflower, and black fungus.
• Sports: Activities such as jumping rope and dancing promote blood circulation.
• Case Studies: German engineer Mark underwent treatment with "tanshinone IIA," and within four days, his blood viscosity decreased by a factor of 1.59, and his chronic headaches disappeared.

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Qi Stagnation Constitution—An “Emotional Pressure Cooker”

Features: Depression, chest tightness, pain in the sides, and a tendency to sigh.
Scientific Basis: Research has found that individuals with a "qi stagnation" constitution exhibit abnormal functional connectivity between the amygdala and the prefrontal cortex, resulting in an excessive stress response.
Treatment Plan：

• Food and Drink: Ingredients that soothe the liver, such as roses, citron, and lemons.
• Sports: The "Cloud Hands" movement in Tai Chi helps promote the smooth flow of qi.
• Case Studies: Ms. Li, a white-collar worker in Shanghai, saw her anxiety scale score drop by 40% within three months through a combination of “stellate ganglion block” and traditional Chinese medicine.

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Damp-Heat Constitution and Constitutional Predisposition—A “Breeding Ground” for Modern Civilization Diseases

• Damp-Heat Constitution: Acne, a bitter taste in the mouth, and moisture in the scrotum—these conditions require a light diet and a decoction of red beans and Job’s tears for treatment.
• Special Quality: If you have a predisposition to allergies, you can boost your immunity with the traditional Chinese medicine formula “Yupingfeng San.”

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How Is Modern Science Redefining Health and Wellness Based on Constitutional Types?

Gut Microbiome—The Body’s “Second Genome”

A study by Harvard Medical School found that people with a “cold” constitution have a higher proportion of the “Firmicutes” phylum in their gut, while those with a “hot” constitution have a richer abundance of the “Bacteroidetes” phylum. This explains why different constitutions react differently to the same diet—for example, those with a balanced constitution can eat ice without any issues, while those with a yang-deficient constitution may experience gastrointestinal discomfort.

Molecular Biology—Unlocking the "Black Box" of Physiology

A research team from Beijing University of Chinese Medicine has discovered that individuals with a "damp-phlegm" constitution have reduced levels of "phytospermidine" in their bodies, and that supplementing this substance can reverse lipid metabolism abnormalities. This study was hailed by *Cell Discovery* as a "milestone in the modernization of traditional Chinese medicine," paving the way for the development of personalized medications.

Wearable Devices—"Real-Time Monitors" of Physical Condition

The "Dynamic Monitoring Technology for Blood Stasis Constitution," developed by Nanjing University of Chinese Medicine, uses a wristband-style device to track blood viscosity in real time, allowing users to adjust their exercise and diet based on the data. This technology has been granted an international patent and is expected to hit the market in 2025.

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A Practical Guide to Constitutional Health: From Identification to Regulation

30-Second Health Self-Assessment (Includes Links to Official Tools)

1. Scan the tongue: A pale, white tongue typically indicates yang deficiency, while a red tongue with little coating typically indicates yin deficiency.
2. Observing Posture: Abdominal obesity is often caused by phlegm-dampness, while flabby muscles are often caused by qi deficiency.
3. Emotional Tendencies: A tendency toward anxiety is often due to qi stagnation, while frequent depression is often due to yin deficiency.
   Official Tools: The National Physical Fitness and Health Network offers a free physical fitness test (https://www.csh.moe.gov.cn); simply answer 100 questions to generate a personalized report.

The "Golden Rules" of Constitutional Regulation

1. Food and Drink: Choose ingredients based on your constitution; for example, if you have qi deficiency, eat more foods that tonify qi, and if you have phlegm-dampness, eat more foods that drain dampness.
2. Sports: Morning exercise is recommended for those with yang deficiency, while relaxing evening exercises are recommended for those with yin deficiency.
3. Traditional Chinese Medicine Techniques: Acupuncture, moxibustion, and acupressure patches can be used to specifically regulate one’s constitution.
4. Lifestyle Habits: Avoid behaviors that harm your health, such as staying up late and overeating.

International Case Study: When Traditional Chinese Medicine’s Theory of Constitutional Types Meets Modern Medicine

"Wellness Academy USA" in Los Angeles has adopted Traditional Chinese Medicine (TCM) constitutional typing to provide clients with personalized nutrition plans. For example, individuals with a yang-deficiency constitution who take daily supplements of vitamin D and iron, combined with the TCM “Warming Yang Exercises,” experienced an average increase in body temperature of 0.5°C within three months, with a 60% reduction in fatigue.

The Dutch organization “Holistic Wellness Bonaire” combines constitutional typing with yoga therapy. For individuals with a “Qi-Stagnation” constitution, the “Liver-Soothing Breathing Technique,” combined with a lavender essential oil massage, achieved an anxiety symptom improvement rate of 78%.

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Conclusion: Nurturing one’s constitution is a “conversation” with one’s own body.

From the concepts of yin-yang and the Five Elements in the *Huangdi Neijing* to gene expression in modern molecular biology; from the “observation, auscultation, inquiry, and palpation” of traditional Chinese medicine practitioners to real-time monitoring via wearable devices—the essence of health preservation based on constitutional types has always been “aligning with the laws of life.”

As the WHO emphasizes in its *Global Report on Physical Activity*: “Health is not a state, but a capacity.” Physical fitness classification is key to helping us understand and strengthen this capacity.

The next time you feel that “something’s off” with your body, try asking yourself: Is this a sign of illness, or a call from your body’s constitution? Through scientific analysis and the wisdom of traditional Chinese medicine, everyone can find their own path to health.

What is your body type? Feel free to share your wellness experiences in the comments section—let’s work together to reignite our vitality through “constitution-based wellness”!

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Authoritative Sources and Further Reading

1. WHO Global Report on Physical Activity: https://www.who.int/zh/publications/b/66393
2. Research by Wang Qi's Team at Beijing University of Chinese Medicine: https://www.bucm.edu.cn/kxyj/27ae04c4654c4170a4b8ad969e7d3b7e.htm
3. Research by Professor Zhu Dong's Team at Nanjing University of Chinese Medicine: https://www.njucm.edu.cn/2025/0621/c6754a157596/page.htm
4. Physical Fitness Test on the National Physical Fitness and Health Website: https://www.csh.moe.gov.cn
5. Harvard Medical School's Anti-Inflammatory Diet Guide: https://www.health.harvard.edu